Tru-Balance Stainless Steel Sifter

(Center Discharge Configuration)

Installation and Operations Manual

Great Western Manufacturing Company, Inc. 2017 South 4th Street

PO Box 149 Leavenworth, KS 66048-0149

USA Phone: (913) 682-2291 • Toll-Free Phone: (800) 682-3121 • Facsimile: (913) 682-1431

World Wide Web: http://www.gwmfg.com

Table of Contents TOC (TBS) 1 of 1

Model: TBS-711C-4 Shop Number(s): 4921

Purpose P Safety Alert Symbols SAS Product Description PD Flow Scheme Description FSD Flow Schematic(s) FSM Installation Drawing(s) ID General Safety Instructions GSI General Operation and Maintenance Instructions GOMI Lifting the Sifter LS Uncrating and Installing the Sifter UIS Inlet and Discharge Nylon Socks and Clamps IDSC Electrical Connections EC Vibration-Sensing Switch (Optional) VSS Low Pressure Switch (Optional) LPS Microswitches for Lift-Off Shields (Optional) M Pneumatic Connections (Optional) PNC Safety Decal Placement Guide SDPG Pre-Operation Checks POC Sieve Removal SRM Sieve Replacement SRP Pneumatic Clamping (Optional) PC Cable Clamping (Optional) CC Inspection Checklist IC Tailings Container TC Screen Replacement SR Lubrication Schedule LBS Flat Gasket Removal and Replacement with Silicone Adhesive (Optional) FGRS Flat Gasket Removal and Replacement with Pressure Sensitive Adhesive (Optional) FGRPSA Removing, Installing, Adjusting and Maintaining the Tie-Bar MTB Sifter Balance SB Troubleshooting T Vibration Troubleshooting VT Technical Data TD Parts List PL

Purpose P

(TBS) 1 of 1

This manual is part of the Tru-Balance Stainless Steel Sifter and should be kept near the machine for users to read.

This manual provides the reader with:

• Installation instructions

• Operation guidelines

• Safety information

• Maintenance instructions

• Parts information

Copyright© 2006 Great Western Manufacturing Company, Inc.

Safety Alert Symbols SAS

(TBS) 1 of 1

Safety alert symbols are used in this manual to indicate potential personal injury hazards. All personnel must observe these potential personal injury hazards and take appropriate preventative action where applicable.

Indicates an imminently hazardous situation that, if not avoided, will result in serious injury or death. This symbol is observed for the most extreme of situations.

Indicates a potentially hazardous situation that, if not avoided, could result in serious injury or death.

Indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

Indicates useful information gained through industry experience that, if not followed, may result in a caution, warning or danger situation.

Product Description PD

(TBS) 1 of 1

The Tru-Balance Stainless Steel Sifter is a precision built screening machine. The gentle gyratory sifting action provides accurate separation and sizing of a product. It is usually floor mounted, but can be attached to the ceiling. The Sifter is manufactured using sanitary construction; the sieves are welded without rivets, nuts, bolts or crevices. The Sifter opens easily for inspection, cleaning and maintenance. Sieve frames are nested one on top of the other between an upper and lower carrier. The stack of sieves is held together by a clamping system. Each sieve frame holds a removable tray with sieve screening material. The screens are attached to the frames using a glued-on attachment method. Screen cleaners unplug product from the screen openings. Gaskets seal the sieves and trays. The Sifter is operated by a motor mounted on the frame, V-belts and counter-balancing weights on eccentric shafts synchronized by a tie-bar. A pneumatic or cable clamping system ensures constant compression while the Sifter is in operation. Both systems provide for convenient assembly and disassembly. The Tru-Balance Stainless Steel Sifter has been assembled, balanced and tested at the factory prior to shipping. The Sifter may be cleaned through dry brushing, air cleaning, water wash down or steam cleaning.

Flow Scheme Description FSD

(TBS) 1 of 1

The Tru-Balance Stainless Steel Sifter is a multi-sieve gravity flow screening machine. The product is gently sieved through vertically nested sieve frames without being forced through the screens. When the product enters the Sifter, it is cascaded along the sieve screens by a horizontal gyratory motion. This gyratory sifting action accurately separates product particles and reduces the risk of fracturing oversize impurities and forcing them through the sieve screens.

Flow Schematic(s) FSM (TBS) 1 of 2

See Attached Sheet(s)

Installation Drawing(s) ID

(TBS) 1 of 3

See Attached Sheet(s)

General Safety Instructions GSI

(TBS) 1 of 1

For your protection, please read these instructions completely before installing, operating or maintaining the Tru-Balance Stainless Steel Sifter.

• Follow your employer’s plant safety guidelines. • The Sifter should be operated only from the type of power source indicated on the motor(s) labels. • Appropriate safety measures should be exercised during installation, operation and maintenance of the Sifter.

Work should be compliant with all appropriate local and national codes. • To ensure proper operation of equipment, periodic maintenance must be performed in accordance with the

manufacturer’s instructions. • Only trained and authorized personnel must be allowed to operate and perform maintenance on the

machinery. • Use caution, especially regarding hands and arms, when installing and operating the Sifter. Operate with

guards in place. • When performing maintenance on the Sifter, all power sources must be locked out to prevent injury to

personnel and potential damage to the equipment. • Use hearing and eye protection in accordance with plant safety guidelines when installing, operating and

maintaining the Sifter. • Dispose of any hazardous waste in accordance with established laws and regulations. Recycle as

appropriate. • Modifications, extensions, additional welding and rebuilding of the Sifter are not permitted without prior

approval of the manufacturer.

General Operations and Maintenance Instructions

GOMI (TBS) 1 of 1

For your protection, please read these instructions completely before installing, operating or maintaining the Tru-Balance Stainless Steel Sifter.

• Before starting the Sifter, make sure the sieve stack is clamped tightly between the top and bottom carriers.

The appropriate section (Pneumatic Clamping or Cable Clamping) of this manual has detailed instructions on this procedure.

• The Sifter has a 2-5/8” or 3-1/2” diameter circle of gyration. The 2-5/8” Sifter should be driven between 230

and 263 rpm. The 3-1/2” Sifter should be driven between 200 and 230 rpm. Do not vary the speed of the Sifter without consulting a Great Western representative.

• Do not allow product to build up inside the Sifter. The Sifter will become unbalanced, which may possibly

damage the drive mechanism. • Lubricating the Sifter is essential for the most efficient operation and the maximum life of the Sifter. See the

Lubrication Schedule section of this manual for the recommended lubrication schedule of the Sifter. • The tie-bar below the Sifter must be properly adjusted. For more information on the tie-bar, see the

Removing, Installing, Adjusting, and Maintaining the Tie-Bar section of this manual. • For advice on installation or operation of the Tru-Balance Stainless Steel Sifter not covered in this manual,

contact a Great Western representative. When calling Great Western, it is helpful to have the Shop Number and Model Number of the Sifter available. These numbers help Great Western identify characteristics and special construction features of the Sifter.

Lifting the Sifter LS

(TBS) 1 of 1

For your protection, please read these instructions completely before lifting the Tru-Balance Stainless Steel Sifter.

When Lifting the Sifter: Using a Crane: • When lifting the Sifter, use extreme care. • Use only hoists that are in good working condition. • Perform a suspension test. • Never work or stand below lifted loads. Using a Forklift: • Check the weight of the Sifter in the Technical Data section of this manual to verify needed carrying capacity. • When lifting the Sifter, lift carefully to avoid damaging the tie-bar and discharge fittings. • Perform a suspension test. • The Sifter can be top heavy. Lower carefully. • Since the shipping case also contains accessories, an out-of-balance situation could occur.

Uncrating and Installing the Sifter UIS

(TBS) 1 of 3

The Tru-Balance Stainless Steel Sifter will arrive in a heavy wooden crate, bolted to a skid. The Sifter may be supplied with an inlet spout support stand. □ Inspect the Sifter for shipping damage. Immediately notify the carrier, in writing, as well as Great Western if

any damages are discovered. □ Remove the crating, except for the skid to which the Sifter is bolted. □ Position the skidded Sifter as close as possible to its final location. □ Unbolt the Sifter from the skid. Lift and place the Sifter in position if using a forklift. Ensure forks go under

frame members at front and back of the frame to protect the tie-bar.

When lifting the Sifter, do not attach chains or straps to the top dome or bearing arms. Use the top or bottom frame members at the front and back for lifting.

PhPo

Photo 2: Proper Sifter Lifting Points, Option 2

oto 1: Proper Sifter Lifting ints, Option 1

Uncrating and Installing the Sifter UIS

(TBS) 2 of 3

□ Prior to final positioning of the Sifter, ensure that the inlet(s) and outlet(s) are properly situated for product line connections. They must be centrally located to allow for proper rotation of the Sifter. Also ensure that there is adequate space around the Sifter for proper safety, operation, and maintenance.

□ Prior to fastening the Sifter frame, ensure that the footpads of the frame sit flat and that all four corners of the

frame are level. If the Sifter frame is not level, place shims under the footpads.

Do not pull the legs down to meet the floor. Shim from the floor up to the legs.

When the Sifter is installed, the frame must be level front-to-back and side-to-side.

Photo 3: Inlet Support Stand

Uncrating and Installing the Sifter UIS

(TBS) 3 of 3

□ If the Sifter is equipped with an inlet support stand, install it at this time. See the instructions for connecting the Inlet and Discharge Nylon Socks and Clamps.

□ Connect the motor(s) and any other electr

of this manual. □ If necessary, connect the pneumatics i

manual.

Do not weld or attadomes. Do not usdestroy the precise

ical devices in accordance with the Electrical Connections section

n accordance with the Pneumatic Connections section of this

ch anything to the tubular frame or either the top or bottom e the frame to support other machinery. These actions will

dimensions of this Sifter.

Inlet and Discharge Nylon Socks and Clamps

IDSC (TBS) 1 of 1

Flexible connecting socks are provided for the inlet and discharge points of the Tru-Balance Stainless Steel Sifter. Two clamps per sock are also provided; use the clamps to secure the inlet, discharge and tailings socks to the Sifter. □ When installing socks for inlet, outlet and tailings, connect the socks over both ends. Securely clamp the sock

to one end. Manually collapse the sock and then securely clamp the sock to the other end. □ The socks should be loose enough to freely rotate with the Sifter. Check this by manually rotating the Sifter.

Standard socks furnished are twelve (12) inches long. These are intended to connect the gyrating Sifter to a fixed spout seven (7) inches apart.

Do not attempt to change the socks or adjust the sock clamps while the Sifter is running.

Photo 1: Flexible Sock and Clamp

Electrical Connections EC

(TBS) 1 of 1

For your protection, please read these instructions completely before performing electrical work on the Tru-Balance Stainless Steel Sifter.

• Only properly licensed electricians should perform electrical work on the Sifter. • All work must be performed in compliance with the technical specifications and regulations for local and

national electrical codes. • Electrical connections should only be made after electrical personnel have read and understood this section

of the manual. • Maintenance on electrically active parts should only be performed in the presence of a second person that

can turn off the electrical power. • The working area should be properly identified for the safety of workers. • Use only insulated tools. • The voltage ratings in the wiring diagram must coincide with the supply voltage. • Assure the Sifter is securely grounded before work begins. Connecting the Motor Connect the motor(s) in accordance with existing electrical codes. Refer to the diagram on the motor nameplate. The rotation of the drive does not matter. Sifters equipped with two motors should have two properly sized starters. The two starters can be connected to start and stop from a single control device. Both motors, however, must rotate in the same direction. Connecting Other Electrical Devices Connect other optional electrical devices in accordance with existing electrical codes. Optional devices include: • Vibration-sensing switch • Low pressure switch • Microswitches for lift-off shields

Vibration-Sensing Switch VSS

(TBS) 1 of 1

The vibration-sensing switch is an added safety feature of some models of the Tru-Balance Stainless Steel Sifter. When properly adjusted, the switch detects out-of-balance conditions, minimizing damage to the Sifter. This device contains an internal switch that activates when there is vibration or shock above a pre-set level. Connecting the Switch □ Carefully read the included instructions before installing the vibration-sensing switch. The switch must be

connected to the motor controller in accordance with existing electrical codes. □ The switch should be connected to stop the Sifter immediately upon activation. Adjusting the Switch □ The vibration-sensing switch arrives pre-set. Under normal operating conditions, it should not need adjusting.

However, should adjustment be needed, Great Western recommends adjusting the switch so that the Sifter is just able to start without tripping the switch.

□ Turn the set point adjustment screw clockwise 1/4-turn to further decrease the sensitivity of the unit.

Turning the set point adjustment screw clockwise decreases the sensitivity to vibrations, while a counter-clockwise turn increases the sensitivity.

Low-Pressure Switch LPS

(TBS) 1 of 1

The low-pressure switch is a standard component of the Tru-Balance Stainless Steel Sifter equipped with a pneumatic clamping system. The switch arrives pre-set in the pneumatic control box. It is intended to function with a programmable logic controller. The switch provides both normally open and normally closed contacts limited to the current rating specified in the Pneumatic Connections section. Normal operating pressure for the sifter is between 120 and 140 psi. Some systems may require a booster to maintain adequate air pressure. If pressure falls below 80 psi, the switch will cause the sifter to shut off or sound an alarm. If the sifter suddenly shuts off due to inadequate air supply: □ Check air supply and air line. □ Re-establish adequate air pressure. □ Initiate start-up procedure and continue operation.

Microswitches for Lift-Off Shields M

(TBS) 1 of 1

Lift-off shields equipped with microswitches are an added safety feature of some models of the Tru-Balance Stainless Steel Sifter. The microswitches on the lift-off shields must be connected to the motor controller in accordance with existing electrical codes. The microswitch prevents the Sifter from running when the lift-off shields are not installed. They may also be wired to shut off the Sifter and/or sound an alarm when the lift-off shields are removed or become improperly aligned during operation. If the Sifter will not run, or the microswitches shut off the Sifter and/or sound an alarm: □ Ensure the lift-off shields are properly installed. □ Initiate start-up procedure and continue operation.

Pneumatic Connections PNC (TBS) 1 of 2

Figure 1: Tru-Balance Stainless Steel Sifter Pneuma

tic Schematic

Pneumatic Connections PNC (TBS) 2 of 2

Figure Number Great Western Item Number Description

1 028-000-211 One Touch Check Valve 2 028-000-799 Silencer 3 028-000-305 Pneumatic Control Box with Screw Cover 4 028-000-502 Dial Gauge w/Pressure Switch 5 028-000-242 Pilot Operated 4-Way, 5-Port Valve 6 028-000-535 Compact Pressure Switch 7 028-000-199 One Touch Female Union 8 026-000-054 One Touch “Y” Union 9 028-000-306 One Touch Connector Bulkhead

10 028-000-320 Conduit Bulkhead 11 400-324-001 One Touch 90° Male Elbow 12 028-000-309 One Touch Male Connector 13 028-000-298 Air Cylinder 14 026-000-039 Metering Valve with Silencer 15 028-000-383 One Touch Plug-In “Y” 16 026-000-057 One Touch Union Bulkhead 17 028-000-311 One Touch Double Universal Male Elbow 18 000-002-088 Pneumatic Cover Plate

Supply Pressure: • Minimum = 100 psi

• Maximum = 120 psi

Connection:

• Connect the air supply line directly to the pneumatic control box.

• In the pneumatic control box, the supply line is equipped with a check valve.

• Use clean, dry air.

• The low pressure switch (optional) is intended to function with a programmable logic controller.

During periods of scheduled maintenance, check the condition of the pneumatic connections and lines to assure they are not worn and no leakage is occurring. If leaks or worn areas are discovered, repair immediately.

Safety Decal Placement Guide SDPG (TBS) 1 of 1

Decal Location Decal

A (Motor Side End Guard)

B (Front and Back Shields)

Pre-Operation Checks POC (TBS) 1 of 1

Always lock out the electrical power before working on the Tru-Balance Stainless Steel Sifter.

□ Before starting, open the Sifter. Remove the sieves and completely clean the Sifter and sieves. This will

ensure that foreign matter has not contaminated the Sifter during shipping or installation. See the Sieve Removal section of this manual.

□ Reassemble the Sifter. Make sure the lift-out trays are properly installed in the sieve frames. See Photo 1

below and the Sieve Replac □ Manually rotate the Sifter to

ement section of this manual.

ensure that it turns freely and that there are no obstructions.

Photo 1: Nested Sieve Stack

Sieve Removal SRM (TBS) 1 of 2

One person can lift and remove the sieves; however, two people work best. The nested sieves are stacked on top of each other above the bottom carrier. The sieves are numbered in order, with the number “1” at the top of the stack. A top spacer may be stacked above sieve 1. □ For pneumatic clamping systems, turn the Pneumatic Control Key to the unclamped position. □ For cable clamping systems, release the two cable clamping devices by loosening the cable take-up shaft in a

counter-clockwise direction. This procedure will lower the bottom carrier.

Do not loosen one side of the cable clamping system all of the way; loosen one side part way and then the other side, or both sides simultaneously. Continue until the bottom carrier is completely lowered.

□ Move to the opposite side of the Tru-Balance Stainless Steel Sifter from which you will remove the sieves. □ A sieve slide comes with the Sifter and helps prevent damage to the sieve screens. Raise the top sieve and

carefully insert the sieve slide with the lip of the sieve slide down. The lip will stop the sieve slide from moving as you remove the sieve from the Sifter.

Photo 1: Initial S

ieve Removal Procedure

Sieve Removal SRM (TBS) 2 of 2

□ Return to the front of the Sifter. Remove the top sieve. Continue removing sieves, one at a time, using the sieve slide.

When removing sieve frames, be careful not to drag the sieve frame on the sieve below. This can damage the screen on the sieve below.

Photo 2: Intermediate Sieve Removal Procedure

Sieve Replacement SRP (TBS) 1 of 3

One person can lift and replace the sieves; however, two people work best. □ If the lift-out trays were removed from the sieve frames during the sieve removal process, they should be

replaced before replacing the sieves.

When inserting the lift-out trays in the sieve frames, ensure the tray mates with the pattern on the sieve frame to create the proper tray-to-sieve frame seal.

□ First install the bottom sieve, which is the highest numbered sieve. Ensure it is lined up with the outlets on the

bottom carrier. □ Place the sieve slide on top of the bottom sieve. Insert the slide on the same side of the frame from which

you will be inserting the sieves. The slide lip must point down. The lip will stop the slide from moving as you push the sieve into the Tru-Balance Stainless Steel Sifter.

When replacing the sieve frames, be careful not to drag the sieve frame on the sieve below. This can damage the screen on the sieve below.

Photo 1: Tray Insertion Procedure

Sieve Replacement SRP (TBS) 2 of 3

□ Carefully place the next siev nsure sieves are placed in reverse numerical order. □ Gently push the sieve acro

damage to the screen on the □ When this sieve is replaced,

Photo 2: Initial Sieve Replacement Procedure

Photo 3: IntermeReplacement Pro

e on top of the sieve slide. E

ss the sieve slide making sure not to rock the sieve frame. This will prevent sieve below.

carefully pull the sieve slide out while holding the sieve frame in place.

diate Sieve cedure

Sieve Replacement SRP (TBS) 3 of 3

□ Repeat this procedure until all of the sieve frames have been replaced.

□ Inspect the sieve frames to ensure they are properly nested together. Make adjustments as necessary.

□ To complete the sieve replacement process, see the appropriate clamping (Pneumatic Clamping or Cable

Clamping) section of this manual for detailed instructions.

Photo 4: Proper Sieve Alignment

Pneumatic Clamping PC

(TBS) 1 of 1

The sieve stack is clamped by a pneumatic clamping system. The system keeps constant pressure on the sieve stack and ensures proper gasket compression.

Do not place fingers near top or bottom of sieves during clamping operation. □ When all the sieve frames with lift out trays are in place, turn the Pneumatic Control Key to the clamped

position. The top carrier will lower.

Ensure a minimum of 100 psi to a maximum of 120 psi of compressed air is available at the Tru-Balance Stainless Steel Sifter.

While the top carrier is lowering, ensure that the top carrier and top spacer properly nest together.

□ After completion of these clamping steps, the Sifter is ready for operation.

The pneumatic control key should be removed to prevent operation of the pneumatics while the Sifter is in operation.

Cable Clamping CC

(TBS) 1 of 1

The sieve stack is clamped by a cable clamping system. If the sieve stack is not clamped tight enough, leaks may occur. If the sieve stack is clamped too tight, carrier/sieve failure and premature gasket wear may occur. □ When all the sieves are in place, tighten the two hold down shafts in a clockwise direction. This will raise the

bottom carrier. □ Do not tighten one hold down shaft all the way. Tighten one side part way and then the other. This will

prevent binding of the system. □ The hold down shafts should be torqued to 25 ft-lbs. This will ensure proper gasket compression and Tru-

Balance Stainless Steel Sifter operation.

Maintain proper alignment of the top carrier and top spacer during this tightening procedure.

□ Periodically check the system to ensure proper clamping.

There should be no sieve movement. There should be no noises from sieve movement. There should be no signs of slippage on the gaskets.

□ After completion of these cable clamping steps the Sifter is ready for operation.

Inspection Checklist IC

(TBS) 1 of 1

The Tru-Balance Stainless Steel Sifter is intended to serve as a quality assurance tool. Inspect the entire Sifter regularly in accordance with an established preventive maintenance and quality control program to ensure proper function.

Disconnect and lock out Sifter motor. Inspection □ Check for evidence of leaks or dusting out. □ Check condition of inlet and discharge socks. □ Check condition of all gaskets (sieve to sieve and sieve to tray) in accordance with plant policy. □ Check screen condition for wear and/or holes on all trays in accordance with plant policy. □ Check screens for blinding (plugging) of product in accordance with plant policy. □ Ensure screen cleaners are in good condition (must be ≥ Ø3/8”). □ Check sieve pans (they should be free of product accumulation). □ Lubricate in accordance with the Lubrication Schedule section of this manual.

Tailings Container TC

(TBS) 1 of 1

Removing Tailings from the Tailings Container □ Loosen hand wheels to open the container. Remove (or open) the tailings container and empty the tailings. □ Re-install the tailings container and securely tighten the hand wheels.

Photo 1: Tailings Container

Screen Replacement SR

(TBS) 1 of 1

The center discharge stainless steel lift-out trays used in the Tru-Balance Stainless Steel Sifter have screens that are mechanically stretched and then glued to the frame. This method of attachment results in a more uniformly and highly tensioned screen, which improves sifting performance. This method is also more sanitary than conventional methods of attachment. When it is necessary to replace the screens or the screen cleaners due to wear or damage, two alternatives exist: • The first alternative is to return the trays to Great Western for replacement. Great Western will

remove the old screens and cleaners, clean the tray frame, and replace the screens and cleaners.

• The second alternative is to purchase a mechanical stretcher so that the repairs can be made in your facility. The equipment required is simple to operate and takes only minutes to replace the screens. Great Western can provide the equipment and supplies for this option.

Lubrication Schedule LBS

(TBS) 1 of 2

Always lock out the electrical power before lubricating the Tru-Balance Stainless Steel Sifter.

Under Normal Operating Conditions The following should be lubricated with Mobilux® EP2 grade grease or a proven, compatible equivalent every 60 days: • 8 pillow-block bearings • 2 tie-bar bearings • 2 cable take-up assembly shafts (for cable clamping

systems)

Photo 2: Tie-Bar Bearing

Photo 1: Pillow-Block Bearing

Photo 3: Cable Take-Up Assembly Shaft

Lubrication Schedule LBS

(TBS) 2 of 2

Under Severe Conditions When operating in an extremely dusty environment, lubricate all bearings and lube points more frequently. Other Lubrication Points □ If a pneumatic clamping system is installed, an anti-seize lubricant should be applied to the upper eccentric. □ If a cable clamping system is installed, an anti-seize lubricant should be applied to the lower eccentric.

Photo 4: Eccentric

Flat Gasket Removal and Replacement with Silicone Adhesive

FGRS (TBS) 1 of 2

The flat gasket material in the Tru-Balance Stainless Steel Sifter will occasionally have to be replaced because of normal wear or damage. Items needing gasket replacement may either be repaired at Great Western or on-site. Great Western can provide the appropriate gasket material and adhesive used when performing the on-site repair process. Gasket Removal □ If possible, pull off the loose gasket material. If the gasket remains, scrape the worn or damaged gasket with

a chisel or scraper using the two-handed method shown in Photo 1.

When the old gaskeremoved as well. material.

Gasket Replacement □ Be sure the gasket surface is dry and free □ Place three beads of adhesive (Great Wes

Adhesive Sealant or equivalent), about 1/8 □ Place appropriate gasket material on the b

from under the gasket.

Photo 1: Gasket

Material Removal

t material is removed, make sure that the old adhesive is This will help provide a clean surface for the new gasket

of dirt and debris.

tern recommends General Electric IS800 Series Silicone Rubber ” wide, along the stainless steel gasket surface.

eads, applying just enough pressure to make the adhesive ooze

Flat Gasket Removal and Replacement with Silicone Adhesive

FGRS (TBS) 2 of 2

□ Wipe off the excess adhesive with a rag. □ Allow adhesive to dry in accordance with manufacturer’s recommendations.

Photo 2: Adhesive Bead Placement

Photo 3: Flat Gasket Application

Flat Gasket Removal and Replacement with Pressure Sensitive Adhesive

FGRPSA (TBS) 1 of 2

The flat gasket material in the Tru-Balance Stainless Steel Sifter will occasionally have to be replaced because of normal wear or damage. Items needing gasket replacement may either be repaired at Great Western or on-site. Great Western can provide the appropriate gasket material and adhesive used when performing the on-site repair process. Gasket Removal □ If possible, pull off the loose gasket material. If the gasket remains, scrape the worn or damaged gasket with

a chisel or scraper using the two-handed method shown in Photo 1.

When the old gaskeremoved as well. material.

Gasket Replacement □ Be sure the gasket surface is dry and free

with denatured alcohol. □ Remove the backing from the gasket mate

3M 468MP Adhesive or equivalent). □ Place the gasket material on the appropria

Photo 1: Gasket

Material Removal

t material is removed, make sure that the old adhesive is This will help provide a clean surface for the new gasket

of dirt and debris. This procedure involves cleaning the surface

rial to expose the adhesive surface (Great Western recommends

te surface applying enough pressure to ensure adequate adhesion.

Flat Gasket Removal and Replacement with Pressure Sensitive Adhesive

FGRPSA (TBS) 2 of 2

The two-handed technique for applying flat gasket with the pressure sensitive adhesive is shown in Photo 2.

Photo 2: Gasket Material Application

Removing, Installing, Adjusting, and Maintaining the Tie-Bar

MTB (TBS) 1 of 3

The Tru-Balance Stainless Steel Sifter is provided with a tie-bar assembly to synchronize its two counterweights.

Do not attempt to operate the Sifter with the tie-bar assembly loose or disconnected.

□ When removing, installing, or adjusting the tie-bar,

begin by positioning the Sifter’s counterweights so that both are parallel and facing the rear as shown in Photo 1. Both throw blocks should be positioned in the same direction, facing to the right of the Sifter.

Removing the Tie-Bar □ Loosen the throw block clamping bolts with a 9/16”

wrench as shown in Photo 2. □ Remove the tie-bar and throw blocks as one unit.

ing Bolt

Photo 1: Counterweight Placement

Photo 2: Throw Block Clamp

Removing, Installing, Adjusting, and Maintaining the Tie-Bar

MTB (TBS) 2 of 3

The original tie-bar equipped on a new Sifter will arrive from the factory pre-adjusted; however, replacement tie-bars will need adjustment.

Installing the Tie-Bar □ Loosen the set collar. □ Position the tie-bar (with the throw blocks attached) under the Sifter and lift towards the Sifter from both ends. □ Slide the throw blocks on to their respective shafts; ensuring that the key slot located in the throw block aligns

with the key located in the shaft. □ Continue to slide the throw blocks up the shafts until the bottom of each shaft and the bottom of each throw

block are flush. □ Securely tighten both throw block clamping bolts as shown in Photo 2.

Adjusting the Tie-Bar The preferred method for adjusting the tie-bar consists of aligning and adjusting the length of the tie-bar. □ Adjust the tie-bar using the counterweights to rotate the Sifter to top dead center position, allowing the tie-bar

to adjust itself to proper length. Tighten the set collar and rotate Sifter by hand. The Sifter should freely rotate.

If tight spots in the rotation are detected, first inspect the tie-bar assembly for possible problems. If no apparent physical problems exist, perform the following alternate tie-bar adjustment procedure:

Photo 3: Straight Edge Placement

Removing, Installing, Adjusting, and Maintaining the Tie-Bar

MTB (TBS) 3 of 3

□ With the counterweights properly positioned parallel towards the rear of the Sifter and the throw blocks pointing to the right, place a straight edge that is long enough to span the width of the Sifter across both of the throw blocks. This straight edge placement is depicted in Photo 3.

The tie-bar is properly adjusted when the straight edge is flat against both throw block edges.

□ Adjustment of the length of the tie-bar may be necessary to align the tie-bar. One end of the tie-bar is

equipped with a split set collar. This is the side from which the length adjustment takes place. □ Loosen the socket head screw located in the set collar with a socket wrench. This will adjust the length of the

tie-bar. □ After performing the tie-bar length adjustment, check the alignment with a straight edge as described above. □ When the alignment is correct, retighten the socket head screw located in the set collar with a socket wrench. □ Check for freedom of rotation. □ If the above procedures fail to bring the tie-bar into proper adjustment, the frame may be damaged. Contact a

Great Western representative for further technical assistance. Maintenance Great Western recommends lubricating the bearings on the ends of the tie-bar a minimum of every 60 days and/or per plant maintenance schedule.

Sifter Balance SB

(TBS) 1 of 1

The Tru-Balance Stainless Steel Sifter was assembled and tested at the factory before shipping and has been balanced to minimize vibration. If, after installation, the Sifter does not run smoothly, review the Vibration Troubleshooting section of this manual for a listing of the most common causes. Some of the typical balance problems that occur during installation and initial start-up are: • The mounting platform could be too weak for the Sifter and its load.

• The Sifter is not securely fastened and leveled to the floor or ceiling.

• The tie-bar is out of adjustment.

• The lift-out trays are not in the Sifter.

• The Sifter has become overloaded.

Troubleshooting T

(TBS) 1 of 2

Always lock out motor.

Never run without guards.

Never run without sieve frames and trays.

Don’t start without notice. Problems and Possible Causes:

Leaking or Dusting-Out:

Sieve frames not tightened. Gasket(s) worn or damaged or improperly installed. Connecting sleeves damaged or improperly installed. Improper sieve alignment. Inadequate air pressure.

Troubleshooting T

(TBS) 2 of 2

No Tailings:

Broken or damaged screen. Sieves turned wrong or improperly installed.

Excessive Tailings (Tailings Contain Too Much Product):

Leak at tailings pot lid or damaged tailings hose. Load to Sifter or product changed (a distinct possibility with truck loading). Screens blinded. Screens too loose (unlikely). Sieves turned wrong or improperly installed.

Sifter Backs Up and Chokes the System:

Sieves turned wrong or improperly installed. Air bypass blinded. Screens blinded. Cleaners worn out. Change in Sifter load. Failing system after the sifter.

Pneumatic Clamping System Not Functioning (If Installed):

Build up of material on upper eccentric. Pneumatic set collars improperly adjusted. Inadequate air pressure. Ruptured air line. Faulty cylinder.

Cable Clamping System Not Functioning (If Installed):

Build up of material on lower eccentric. Threaded shafts of take-up assembly not lubricated. Damaged or misaligned cable.

Excessive Vibration:

See the Vibration Troubleshooting section of this manual.

Vibration Troubleshooting VT

(TBS) 1 of 2

When the Tru-Balance Stainless Steel Sifter is producing excessive vibrations, first identify whether it is due to an imbalance or a mechanical problem; this can normally be done by simply grasping the frame. If the frame has a shock or mechanical jolt with each revolution, it is probably not out of balance. If the frame feels solid but has a swaying or pulling feel, then it is out of balance. A list of probable causes of excessive Sifter vibration, in the sequence generally found to be the cause, follows: • Faulty Bearings in Tie-Bar: If there is significant movement or play in the bearing, or if you can tell the

bearing itself is loose, the bearing should be replaced. • Improperly Adjusted or Installed Tie-Bar: Follow the instructions for the type of tie-bar installed on your

Sifter. Throw blocks should always be installed flush with the bottom of the shaft. Once the tie-bar is installed and tightened, the Sifter should be revolved by hand. The movement should be uniform with no tight spots or binding feeling. See the Removing, Installing, Adjusting and Maintaining the Tie-Bar section of this manual.

• Accumulation of Material in the Sifter: The increased weight of product accumulated in the Sifter will cause

it to be out of balance. This is checked and corrected by opening the Sifter and removing the sieves. Clean out and re-install the sieves.

• Loose or Broken Weight Bucket Keys: A full-sized key is used to hold the weight bucket in the proper

position on the drive shaft. Occasionally the key can wear the bucket knuckle, causing the bucket to shift slightly and cause the Sifter to vibrate. This is checked and corrected by loosening the weight bucket, prying it up, and observing the key; if the key is worn or broken, replace the key and securely tighten the bucket. If the knuckle is worn, the bucket should be replaced.

• Improper Leveling or Loose Mounting: The Sifter should be level on the floor or mounting platform. On

installation, shims should be placed under legs. The anchor bolts should not be used to pull the legs down to the floor. Check for an out of level condition. Movement can also occur if the bolts holding the Sifter to the floor or ceiling are loose or if the mounting pads have broken.

• Mounting Platform Too Weak: Occasionally, platforms are designed and built which are not rigid enough to

support the Sifter or adequately absorb small vibrations that may occur. This is apparent when a Sifter runs smoothly without a load but causes the platform to shake when loaded. Consult a structural engineer regarding reinforcement of the platform or consult with Great Western about adding bracing to the Sifter.

• Bad Pillow-Block Bearings: The Sifter uses eight (8) pillow-block bearings. Normally, even if the four

attached to the Sifter frame go bad, little can be detected from the Sifter’s operation. However, if any of the four bearings attached to the upper and lower dome drive frames wear, to where they have significant play, the Sifter will shake excessively. Remove these bearings and replace them if excessive play or wear is detected.

Vibration Troubleshooting VT

(TBS) 2 of 2

• Broken Drive Component: If the upper or lower dome drive frames or any of the four bearing frame support arms have broken, a mechanical punch or vibration will result when operating the Sifter. Due to the precision to which these Sifters are manufactured, it is not possible to weld the broken components; they must be replaced. Also verify that the knuckle has not broken loose from the weight bucket. If it has, the entire bucket assembly should be replaced.

• Out of Balance: Verify that the lead weights and wooden spacers are in the bucket in the number and

sequence shown by checking the weight chart on the weight buckets. Generally, if the housing, sieves, and weights in the weight bucket have not changed, then the originally balanced Sifter will remain in balance.

Technical Data TD

(TBS) 1 of 3

TBS-500 Series

TBS-700 Series

TBS-700C

Series

TBS-800 Series

TBS-800C

Series

Dimensions: (W x D x H)

Inch

Centimeter

75 x 40 x (59 to 70)

191 x 102 x (150 to 178)

76 x 40 x (59 to 75)

193 x 102 x (150 to 191)

76 x 40 x (59 to 75)

193 x 102 x (150 to 191)

76 x 40 x (62 to 75)

193 x 102 x (158 to 191)

76 x 40 x (62 to 75)

193 x 102 x (158 to 191)

Space

Demand: (W x D x H)

Inch*

Centimeter*

105 x 70 x (79 to 90)

267 x 178 x (201 to 229)

109 x 73 x (79 to 95)

277 x 186 x (201 to 242)

109 x 73 x (79 to 95)

277 x 186 x (201 to 242)

116 x 80 x (82 to 95)

295 x 204 x (209 to 242)

116 x 80 x (82 to 95)

295 x 204 x (209 to 242)

Total Weight: (With Crating)

Pound

Kilogram

≈ 2200

≈ 1000

≈ 2600

≈ 1180

≈ 2600

≈ 1180

≈ 2950

≈ 1340

≈ 2950

≈ 1340

Electrical Data:

Voltage

Horsepower

230/460

1.5

230/460

1.5

230/460

1.5

230/460

1.5

230/460

1.5

Noise Emission:

< 85 dB(A)

< 85 dB(A)

< 85 dB(A)

< 85 dB(A)

< 85 dB(A)

In addition to machine dimensions, ensure adequate space is in front of, behind and on each side of the sifter for proper safety, operation and maintenance. These dimensions reflect the space needed to remove the sieves plus an additional 18 inches all around the Sifter.

Technical Data TD

(TBS) 2 of 3

TBS-500 Series

TBS-700 Series

TBS-700C

Series

TBS-800 Series

TBS-800C

Series

Pneumatic Data:

Minimum Pressure

Maximum Pressure

Quality

100 psi 5.5 bar

120 psi 8.3 bar

Dry, oil free

100 psi 5.5 bar

120 psi 8.3 bar

Dry, oil free

100 psi 5.5 bar

120 psi 8.3 bar

Dry, oil free

100 psi 5.5 bar

120 psi 8.3 bar

Dry, oil free

100 psi 5.5 bar

120 psi 8.3 bar

Dry, oil free

Sieve

Dimension:

Inch

Centimeter

30 x 30

77 x 77

33 x 33

84 x 84

33 x 33

84 x 84

35 x 40

89 x 102

35 x 40

89 x 102

Net Screen Area:

Feet2/Sieve

Meter2/Sieve

3.9

0.36

4.8

0.45

4.7

0.44

6.4

0.59

6.5

0.60

Net Sieving Area:

Feet2

Meter2

(15.6 to 31.2)

(1.45 to 2.90)

(19.2 to 43.2)

(1.78 to 4.01)

(18.8 to 42.3)

(1.76 to 3.96)

(38.4 to 57.6)

(3.57 to 5.35)

(39 to 58.5)

(3.6 to 5.4)

Spouting Diameter:

Inch

Centimeter

(4 to 8)

(11 to 21)

(4 to 8)

(11 to 21)

(4 to 8)

(11 to 21)

(4 to 8)

(11 to 21)

(4 to 8)

(11 to 21)

Technical Data TD

(TBS) 3 of 3

Ambient Conditions:

(For All Models)

Transport and Storage Operation

Operating Temperature:

Humidity:

Installation Location:

Normal room temperature

Dry, roof over

Read transport instructions on

packing

Normal room temperature

Dry, roof over

Dust free, horizontal solid

foundation

Parts List PL

(TBS) 1 of 8

Figure Number Description 1 Inlet 2 Inlet Hose Clamp 3 Inlet Sock 4 Flanged Hex Nut w/ Set Screw 5 Top Carriage 7 Intermediate Sieve

7-A Sieve Slide 7-B Cleaner Cube 7-C Cleaner Ball 7-D Tray Screen 7-E Tray 7-F Sieve to Tray Gasket 7-G Sieve 7-H Sieve to Sieve Gasket 8 Bottom Sieve 9 Right Side Alignment Bar

11 Bottom Carriage 12 Transition 13 Tailings Container Sock 14 Tailings Container Assy

14-A Lid Assy 14-B Gasket 14-C Eyebolt Assy with Knob and Washer 14-D Container Bracket 14-E Tailings Container 15 Tailings Container Sock Clamp 16 Cylinder 17 Cylinder Rod 18 Left Side Alignment Bar 19 Front/Back Alignment Bar 20 Suction Attachment Sock 21 Suction Attachment Clamp 22 Inlet Support Stand 23 Vibration Switch 24 Frame Assy

24-A Upper Bearing Arm Assy 24-B Lower Bearing Arm Assy 25 Pillow Block Bearing 26 Top Eccentric 27 Center Shaft 28 Bottom Eccentric 29 Woodruff Key 30 Pneumatic Control Box Assy 31 Pin-Type Throw Block

Parts List PL

(TBS) 2 of 8

Figure Number Description 32 Tie-Bar Assy

32-A Shaft-End Bearing 32-B Steel Pipe Assy 32-C Adjuster Assy 33 Driver QD Bushing 34 Driver Sheave 35 Motor 36 Weight Bucket Dust Cover 37 Lead Weight 38 Weight Bucket Assy 39 Driven QD Bushing 40 V-Belt 41 Driven Sheave 42 Vibration Switch Mounting Plate 43 End Guard 44 Right Guard 45 Front/Back Shield 46 Motor Guard 47 Back Left Guard 48 Microswitch 49 Front Left Guard 50 Eccentric Guard

Parts List PL

(TBS) 3 of 8

Parts List PL

(TBS) 4 of 8

Parts List PL

(TBS) 5 of 8

Parts List PL

(TBS) 6 of 8

Parts List PL

(TBS) 7 of 8

Parts List PL

(TBS) 8 of 8