M Series Motors L Series Motors - SAi Hydraulic Motorssaihyd.com/old/M-L General Info.pdfseries...

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L Series Motors M Series Motors HYDRAULIC MOTORS MAINTENANCE MANUAL SECOND EDITION 939351

Transcript of M Series Motors L Series Motors - SAi Hydraulic Motorssaihyd.com/old/M-L General Info.pdfseries...

L Series Motors

M Series Motors

HYDRAULIC MOTORS

MAINTENANCE MANUAL

SECOND EDITION 939351

1

GUARANTEE CONDITIONS

THE FOLLOWING IS A SUMMARY OF THE GUARANTEE FOR PRODUCTS MANUFACTUREDBY SAI HYDRAULICS, INC. IT DOES NOT SUBSTITUTE THE TEXT IN THE ORIGINAL DOCU-MENT.

CONDITIONS

Guarantee periodThe guarantee on products made by SAI Hydraulics,Inc. is valid for a period of six (6) months from thedate of first use or twelve (12) months from the dateof the shipment from SAI Hydraulics, Inc., whicheverperiod expires last.

NoticeClaims against defects must be received by SAI Hy-draulics, Inc. before the end of the guarantee periodand must cite the factory reference number punchedon the distributor and/or motor cover lead seal.

On Site InspectionSAI motors or other SAI products, whether they areapparently defective or not, must not be opened forinspection, alteration or repair. In these cases SAIHydraulics, Inc. reserves the right to declare the guar-antee null and void. Components may only be openedwith prior written authorization from SAI Hydraulics,Inc. and claims will only be accepted if sufficient evi-dence of the defect in question is sent to SAI Hydrau-lics, Inc. SAI reserves final judgement on all such cases.

Return Under GuaranteeProducts shall be returned to SAI Hydraulics, Inc. orto SAI service centers only with prior acceptance fromSAI Hydraulics, Inc. It is the Buyer’s responsibilityto return the components under guarantee (or not),freight pre-paid, for inspection. If the component isfound to be defective it will be replaced or repairedfree of charge. Motors without the original factoryseal on the distributor and/or motor cover will not beaccepted.

ExclusionsThe guarantee is limited to the replacement or repairof defective products and does not include labor,comsumables or other costs incurred in removing,dimantling or reinstalling the defective articles, SAIHydraulics, Inc. shall in no circumstances be liable forconsequential damages.

GUARANTEESAI guarantees that at the time of shipment all standard production motors manufactured by SAI Hydraulics, Inc.will be free of defects in materials and workmanship, and undertakes to replace or otherwise correct any compo-nent, or part thereof, which is found to be defective.

2

MOUNTING INSTRUCTIONSBefore mounting the motor, ensure that it has notbeen damaged during transport.

The motors have a mounting flange with slots or holesfor the mounting bolts and a spigot centered on theaxis of the motor shaft. The bolts used for the instal-lation should be of a diameter corresponding to thesize of the slots or holes provided and should beinstalled in such a way that they cannot come un-screwed. Particular attention is required when themotor is mounted to a thin flange or sheet metalmounting.

Larger than specified installation tolerances cancause excessive loading of the shaft resulting in a

considerable reduction in duration or failure of theshaft bearings or of the shaft. For installation meth-ods that allow for larger installation tolerances, con-tact your SAI representative.

Radial Loads: Consult the bearing lifetime graphsgiven in the technical catalog for allowable radialloading.

Axial Loads: The shafts must not be subjected toaxial shocks. Motors with roller bearings cannotsustain axial loads; motors with ball bearings orspherical roller bearings can sustain light axial loadsin compression and heavier axial loads in traction.Contact your SAI representative for applications thatrequire axial loading.

DRAIN LINE POSITIONING (Fig. 1)The drain line must be positioned in such a way thatthere is always sufficient oil in the casing for the lu-brication of the dynamic components in the motor.If the motor is installed with the shaft in a horizontalposition, the drain line should be connected to theuppermost drain line port.If the motor is installed with the shaft pointing down-ward, the drain line can be connected to either ofthe two drain line ports.If the motor is installed with the shaft pointing up-wards, the motor casing has to be entirely filled withoil before being installed and the drain line connectedin such a way that no air can enter into the motorcasing causing the front bearing to run dry. This isespecially important if the motor operates at very lowspeeds or remains inactive for long periods. For al-ternative systems, contact your SAI representative.The drain line should be of a diameter correspond-ing to the size of the drain port and flow must not beobstructed by sharp corners, restrictions, etc.

Fig. 1 Drain Line Positioning

15 psi

INSTALLATION

3

HIGH PRESSURE PIPELINESSAI recommends the use of high quality flexible or rigid pressure pipelines. Follow pipe manufacturer’srecommendations on suitable sizes for different flow velocities, pressures and resistances. To mini-mize the effects of oil compressibility, pipelines should be kept to a minimum length, minimum diam-eter (compatible with flow requirements) and maximum rigidity.

DIRECTION OF SHAFT ROTATION (Fig. 2)All motors are bi-directional. The direction ofshaft rotation is determined by the direction ofoil flow. With standard motors (set “in phase”),flow entering in port A causes the shaft to rotateclockwise (as seen from the shaft side of themotor). Flow entering port B causes anti-clock-wise rotation. This configuration may be re-versed by changing the phase of the motor (seepages 25-26).

Fig. 2 Direction of Shaft Rotation

TYPICAL INSTALLATION OF A VARIABLE DISPLACEMENT PUMPAND FIXED DISPLACEMENT MOTOR

1 Variable displacement pump2 Fixed displacement motor3 Tank4 Shut-off valve5 Filter6 Pump inlet line

7 Pump case drain line8 Motor case drain line9 High pressure lines10 Heat exchanger11 Heat exchanger by-pass12 Tank fill cap

4

HYDRAULIC FLUIDS

MINERAL OILSSAI recommends the use of high quality mineralbased hydraulic oil containing anti-wear, anti-foaming, anti-oxidation and extreme pressure ad-ditives.

Allowable oil temperature range:Ideal +86°F to 122°F

Allowable -0°F to 180°F

Motors are available on request for operation atlower temperatures (-10°F) or higher tempera-tures (to 200°F).

Operating viscosity range:Ideal 100 SUS

Allowable 8 cSt to 3000 cSt

Temperature TEXACO B.P. ESSO SHELL MOBIL ISO Rating

60 - 100°F RANDO HLP 32 NUTO H32 TELLUS 37 DTE 24 32

100 - 125°F RANDO HD46 HLP 46 NUTO H46 TELLUS 46 DTE 25 46

125 - 150°F RANDO HD 68 HLP 68 NUTO H68 TELLUS 68 DTE 26 68

150 - 170°F RANDO HD100 HLP 100 NUTO H100 TELLUS 100 DTE 26 100

FIRE RESISTANT FLUIDS(i) Synthetic fluids: (phosphate esters, poly-esters, ...) These fluids have similar character-istics to mineral oils and the same temperatureand viscosity specifications apply. These fluidsmay, however, require suitable seals (such asViton) available on request.

(ii) Water-based fluids: (water-oil emulsions,water-glysol solutions, ...) Due to the low lubric-ity of these fluids, the lifetime of the componentswill be reduced and the following limitations ap-ply:

Maximum continuous pressure 1500 psiReduction in maximum speed 50%Allowable temperature range +50°F to 140°F

The guarantee on motors operating with fluidsother than mineral oils for hydraulic applicationsis only valid if the application is first approved bySAI.

FILTRATIONSAI recommends filters of up to 25 micron, 10mircon filters are preferrable.

Even though SAI motors are relatively resistantto polluted oil, clean oil and efficient filters areimportant for the correct functioning and reliabil-ity of all the components in the hydraulic sys-tem.

Efficiency of the filters is impaired by the gradualaccumulation of particles intercepted and filtersshould be regularly inspected. The relative effi-ciency of a filter may be measured, for example,by taking regular readings of the pressure dropacross the filter.

Special attention is required when the hydraulicsystem is first put into operation or when any ofthe components are replaced or have becomeworn through.

Follow filter manufacturer’s recommendations forfilter element lifetime and cleaning or substitu-tion cycles.

5

MOTOR OPERATION AND SERVICING

KEEPING MOTORS IN STOCK OR INACTIVEIf the motors are kept in stock or inactive for morethan 3 months, the casing and the cylinders mustbe completely filled with oil to prevent rusting.

START-UPBefore connecting any tubes, ensure that theyare thoroughly clean. Any excess material thatcould work loose should be removed and thereshould not be any oxidation of surfaces that comeinto contact with the oil.

Before starting work, the motor casing must befilled with oil and the hydraulic circuit should bepurged of air. This can be achieved by runningthe motor without load for 10-20 minutes, duringwhich time checks should be made for leakagesfrom connections.

During the first few hours of working under load,checks should be made for leakages from con-nections and to ensure all components remainfirmly fixed to their supports.

All motors are factory tested and do not requireto be run in.

CYLINDER LEAKAGE TEST FLANGE (Fig. 3)The flange shown below may be used to test theefficiency of individual cylinders by measuringtheir leakage rates under pressure. The flangeis fixed to the motor in the place of the distribu-tor. This flange may be used in the place of alldistributors except D43, D80, D81, D90, D91,D250 and all older type distributors.

Fig. 3 Cylinder Leakage Test Flange

Dimensions in mm

6

TROUBLESHOOTING

Repair worn or damaged components

Align correctly

Bleed circuit

Install anti-cavitation valves

Pressurize return line

Overhaul motor

Reduce temperature or replace oil

Check or improve system

Replace w/ larger displacement motor

Set correctly

Replace pump

Replace with smaller motor

Overhaul motor

Replace pump

Replace seals

Overhaul motor

Replace distributor

Adjust or replace

Bleed circuit

Adjust or replace

Connect directly to reservoir

Replace drain line

Overhaul motor

Reverse the connection

Change distributor phase

PROBLEM POSSIBLE CAUSE REMEDY

Excessive noise levels

Motor overheating

Inadequate torque

Pulsating drainage

Continuous excessive drainage

Excessive pressure or speedfluctuation

Pressure in drain line or burstshaft seal

Incorrect direction of shaftrotation

Mechanical vibrations

Motor incorrectly aligned

Air in the circuit

Cavitation

Insufficient back pressure

Motor or cylinder seals worn

Oil viscosity too low

Inadequate cooling system

Motor displacement too small

Pressure relief valve set incorrectly

Inadequate pump

Motor displacement too large

Excessive drainage

Inadequate pump

One or more cylinder seals worn

All cylinder seals worn

Seized distributor

Defective flow regulators

Air in the circuit

Instability of relief valves

Drainage connected to return line

Drain line pinched or too small

Excessive motor drainage

Tubes connected incorrectly

Distributor assembled incorrectly

Inadequate speed

7

TECHNICAL DETAILS

MOTOR IDENTIFICATION

IMPORTANT:On assembly the distributor cover and/or the mo-tor cover are closed with a numbered lead seal(from 1/1/91). This seal is very important: see“Guarantee Conditions”. The number on the sealis a factory reference number that identifies thefactory of origin and the assembly worker in-volved and should always be cited in correspon-dence regarding the motor.

IDENTIFICATION OF MOTOR SERIESShould the motor identification plate be missingor damaged, it is possible to identify the motorfrom its external diameter.

IDENTIFICATION OF MOTOR DISPLACEMENTThe displacement may be found on the motoridentification plate or from the reference num-ber punched on the motor cover (from 1/1/85).In some cases the actual displacement of themotor is punched instead.

Identification of motor displacement

MOTOR BOLT TIGHTENING TORQUES DISTRIBUTOR BOLT TIGHTENING TORQUES

seireSlpsiD

)"78.7.maiD(50M )"26.01.maiD1L,"52.9.maiD1M(1L,1M04 06 57 09 011 031 051 071 002 05 57 09 001 051 571 002 022 052 003

.oN 1 2 3 4 5 6 7 8 9 9 1 2 3 4 5 6 7 8 01

seireSlpsiD

)"47.21.maiD2L,"18.11.maiD2M(2L,2M )"53.51.maiD3L,"79.31.maiD3M(3L,3M531 061 091 012 052 003 053 004 024 054 094 053 004 005 055 006 007 008

.oN 1 2 3 4 5 6 7 8 9 01 11 1 2 3 4 5 6 7

seireSlpsiD

)"47.51.maiD4M(4M )"05.81.maiD5L,"07.81.maiD5M(5L,5M054 055 006 026 586 007 008 009 0001 0011 0521 008 0001 0021 0531 0061 0081 0002

.oN 1 2 3 4 5 6 7 8 9 01 11 1 2 3 4 5 6 7

seireSlpsiD

)"33.32.maiD(7L )"07.03.maiD(9L0002 0052 0003 0063 0034 0074 0075 0066 0077 0088 000,01 000,21

.oN 1 2 3 4 5 6 1 2 3 4 5 6

ROTOMTEKSAGHTIWSROTOM GNIR-OHTIWSROTOM

TLOB EUQROT)bl/tf( TLOB EUQROT

)bl/tf(50M 21M9.21 881M 01M9.21 84 01M9.21 851L 21M9.21 882M 21M8.8 66 21M8.8 372L 21M9.21 683M 01M9.21 66 41M8.8 0113L 41M8.8 594M 61M8.8 641 61M8.8 6415M 41M8.8 301 81M8.85L 81M8.8 5027L 02M8.8 5829L 42M8.8

ROTUBIRTSID TLOB EUQROT)bl/tf(

,..73D,..13D,03D,74D,54D,..24D,04D

,..05D,..94D,..84D15D

21M9.211395INU 88

09D,08D,34D 41M9.211395INU 641

8

CYLINDER SEAL WITH/WITHOUT O-RINGThere are two types of cylinder seals: those withslipper with a compression o-ring and those withonly a slipper seal.

CC - nominal motor displacementDiam - cylinder diameterX - without o-ringO - with o-ring

DIAMETER IS IN MILLIMETERS (1 in. = 25.4 mm)

With O-Ring Without O-Ring

50M 1L,1M 2L,2M 3L,3M 4M 5L,5M 7L 9L

CC maiD X/O CC maiD X/O CC maiD X/O CC maiD X/O CC maiD X/O CC maiD X/O CC maiD X/O CC maiD X/O

0406

52 X 055709

82 X 531061091

53 O 053004005

74 O 054055026

25 O 00800010021

36 O 00020003

001 O 0075 021 O

57 82 O 001051

53 O 012052003

44 O 055 05 O 006007008

95 O 0531 76 X 00520063

011 O 0066 031 O

011 53 O 571 73 X 053 74 X 006 25 X 586009

36 O 0061 47 O 0034 021 O 0077 041 O

09031

73 O 002 04 O 004 05 O 007 65 X 0001 76 X 0081 87 X 0074 521 O 0088 051 O

051 04 X 022 24 X 024 25 X 008 06 X 0011 07 X 0002 28 X 00001 061 O

071 24 X 052 44 X 054 45 X 0521 47 X 00021 571 O

002 54 X 003 84 X 094 65 X

Special Cylinders:M3, L3: Ø35 and Ø40mm with o-ringM4: Ø42 and Ø47mm with o-ringM5, L5: Ø47 and Ø52 with o-ring

INTERCHANGEABILITY OF CYLINDERS/PISTONSThe tolerances between cylinders and pistons aresufficiently wide to enable most pistons to be inter-changeable between cylinders with the same nomi-nal diameter. However, to avoid possible incompat-ibility, it should be assumed they are not interchange-able and worn cylinders or pistons should only besubstituted with cylinder+piston sub-assemblies assupplied by SAI.

WIDENED CYLINDERSIn M series and L1 - L5 series motors, the larger dis-placement motors have wider cylinders than the otherdisplacements. See also “Cylinder Bushings” onpages 9 and 10.

1L,1M 2L,2M 3L,3M 4M 5L,5M

maiD L maiD L maiD L maiD L maiD L

lamroN 73-82 64 74-53 85 25-74 46 36-25 08 76-36 78

denediW44-04 1 05 65-05 36 06-65 86 47-76 68 28-47 49

44 2 84- 55

CYLINDER WIDTHS

1 Up to 7/92 2 From 7/92

9

CC - motor displacementX1 - motor coverX2 - motor body (mm)

Note: M5, L5 motors manufactured before 01/91,X1 = 2; X2 = 5

Normal Cylinders Wide Cylinders

MOTOR COVER AND BODY MODIFICATIONS FOR MOTORS WITH WIDENED CYLINDERSThe table below indicates the differences in motor body and cover for motors with widened cylinders.

BUSHINGSThe design of the bushings was modified during the period 1990-92. Current motors have split bush-ings with a separating circlip to prevent the bushing from dislodging under extreme pressure. Thetable below shows the installation dimensions and tolerances.

M05, L7 and L9 series motors, with the radial injection design, have integral bushings as these are notsubjected to axial pressure loading. The bushings in the motor cover (A) have a radial hole in them;those in the motor body (B) do not. M05 series motors do not have bushings in the motor body.

The normal length bushings are used with the normal width cylinders and the short bushings for thewidened cylinders. With the widened cylinders, the motor body and cover castings are also modifiedas shown above. See also “Widened Cylinders” on page 8.

DIAMETER IS IN MILLIMETERS (1 in = 25.4 mm)

50M 1M 2L,2M3L,3M 4M 5L,5M 7L

A 5.82 7 8 5.21 5.21 84B - 9 31 51 - 84C - 7 11 31 31 -

.txE-.maiD 23 6.0+80.0+

03 71.0+51.0+

83 71.0+51.0+

64 71.0+51.0+

64 71.0+51.0+

06 40.0+60.0+

.tnI-.maiD 52 41.0+61.0+

22 62.0+42.0+

03 62.0+42.0+

83 62.0+42.0+

83 62.0+42.0+

05 31.0+51.0+

M1 - M5, L1 - L5 M05, L7, L9

DIAMETER IS IN MILLIMETERS (1 in = 25.4 mm)

X1

1L,1M 2L,2M 3L,3M 4M 5L,5M

CC002022052

003 004024054094

007008

000100110521

006100810002

X1 2 5.4 5.2 2 3 0X2 2 5.4 5.2 2 3 7

10

OLD TYPE BUSHINGSBefore 1990-92, the cylinder trunnion bushings were single bushings without circlip. The table belowshows the dimensions of the old type of bushing used. The dimensions of the cylinder widths (seepage 8) have remained unchanged. The motor body and cover dimensions have also remainedunchanged, except for M5 and L5 series motors (see page 9).

STANDARD AND OPTIONAL BEARINGS

SERIES: M3E and M5EMotors with reinforced shaft with larger central bearing and modified pistons, cylinders and castings.

SERIES: M4-3 and M5-3Motors with internal shafts. The rear bearing is always standard M4 or M5 roller bearing.

TYPE: B - ball bearingsH - roller bearingsG - spherical roller bearings

1 Requires modified shaft and/or castings 2 Front bearing 3 Rear bearing

ST/OP: ST = StandardOP = Optional

SEIRES EPYT PO/TS SNOISNEMID EDOC

50MB TS 91-58-54 3307000100

H PO 91-58-54 0607000100

1M

B TS 91-58-54 3307000100

H PO 91-58-54 0607000100

G PO 1 32-58-54

2M

B TS 12-001-55 7307000100

H PO 12-001-55 5107000100

G PO 1 52-001-55 7907000100

3M

B TS 12-001-55 7307000100

H PO 12-001-55 5107000100

G PO 1 52-001-55 7907000100

E3M

B TS 32-021-56 9317000100

H PO 32-021-56 3907000100

G PO 1 13-021-56 8317000100

SEIRES EPYT PO/TS SNOISNEMID EDOC

4MH TS 33-041-56 2607000100

G PO 33-041-56 9707000100

3-4MH TS 2 33-041-08 0907000100

G PO 2 33-041-08 6907000100

5MH TS 33-041-56 2607000100

G PO 33-041-56 9707000100

3-5MH TS 2 33-041-08 0907000100

G PO 2 33-041-08 6907000100

E5M

B TS 73-061-57 4907000100

H PO 73-061-57 1907000100

G PO 73-061-57 7317000100

7L G TS 35-002-011 5907000100

9LG TS 2 09-032-031

G TS 3 09-032-031

1M3L,3M

2L,2M5L,5M 4M

lamron-L 61 12 82trohs-L 41 91 52

lanretxe-eØ 03 71.0+51.0+

83 71.0+51.0+

64 71.0+51.0+

lanretni-iØ 22 62.0+42.0+

03 62.0+42.0+

83 62.0+42.0+

noitresniretfa-iØ 22 01.0+80.0+

03 01.0+80.0+

83 01.0+80.0+

11

TECHNICAL EVOLUTIONSAI motors have evolved over the years with the following variations in the denominations of the motor series:

from to Name1964 - 1971 SL1971 - 1974 MS1974 - 1988 MT1977 - 1988 MTcp, MU, LA ... LE1988 - today M05 ... M5, L1... L9

1971 - 1974The MS Series replaces the SL Series with thefollowing modifications:

1. Introduction of the central bearing design withspherical piston support ring, replaceing the de-sign with direct sliding contact between pistonsand crankshaft (Fig. A).

2. Introduction of a new, hydraulically balanceddistributor which improves the overall efficien-cies of the motor.

3. Substitution of the polyurethane seal on thecylinder trunnions with a solid design polyure-thane seal.

1974 - 1977The MT Series substitutes the MS series withthe following modifications:

1. The solid piston is replaced with the hollowpiston to reduce motor weight and to increaseits speed (Fig. B).

2. Substitution of the solid polyurethane seal onthe cylinder trunnions with a U-shaped designseal in PTFE1 with o-ring (Fig. C).

3. Subsequently the material used for the sealis changed from PTFE1 to PTFE2.

1977 - 1980The MTcp series substitutes the MS series witha number of important modifications:

1. A hydrostatically balanced piston is intro-duced, improving mechanical efficiency, lifetimeand back-pressure characteristic of the motor(Fig. D).

Fig. A

Fig. B

Fig. C

Fig. D

12

2. The design of the central bearing with pin rollers isreplaced with a design of fully packed short roller bear-ings of large diameter, resulting in a significant in-crease in the load capacity of the bearing as well asan increase in speed capacity of the motor (Fig. E).

3. Introduction of the MU300 and MU800 series mo-tors placed between the three existing series.

4. The motor body and cover castings are modifiedto eliminate some inconveniences encountered pre-viously.

5. The bronze bushings are introduced to substitutethose made of a plastic material enabling the operat-ing temperature of the motor to be increased from122°F to 176°F and significantly improving the motor’sreliability.

6. The cylinder trunnion seal material is changed fromPTFE2 to PTFE3 improving its resistance in heavyduty applications.

7. Introduction of the cylinder slipper seal with thefollowing advantages: Increased tolerance betweenpiston and cylinder; elimination of piston seizure prob-lems; improved volumetric efficiency; improved me-chanical efficiency (Fig. F).

1980 - 1985The detail design of the MTcp and MU series motorsis improved and new series of motors are introduced.

1. Range of displacements in each series is increasedwith the introduction of widened cylinders.

2. Introduction of the star-shaped motors LA... LE(Fig. G).

3. Introduction of the MTcp 500 and 1200 series withreinforced shaft and heavy duty bearings.

4. Introduction of HP series high pressure motors:nodular cast-iron castings and other modificationsenable peak operating pressures of 8500 psi.

5. Introduction of the two-speed motors.

Fig. E

Fig. F

Fig. G

13

1985 - 1990A number of modifications and a new distributor bringthe evolution of the motor up to its current configura-tion.

1. New distributor with its highly efficient and com-pact design has flow pressure and speed character-istics which enable the same basic distributor to beused on nearly all motors (Fig. H).

2. New motor body and cover castings are introducedfor M series motors, with the substitution of the papergaskets between motor body and cover with an o-ring,reduction in the number of drain-line ports from threeto two (Fig. I).

3. The names of the MTcp and MU series motorschanges to M1...M5, LA...LE series to L1... L5.

4. Introduction of L7 series increases maximum avail-able displacement to 263 cu in/rev.

5. Introduction of small, lightweight M05 series.

1990 - Today1. The design of the cylinder trunnion bushes is modi-fied to prevent them from moving under extreme pres-sures (Fig. J).

2. Introduction of the P series motors in aluminumThese new motors use the latest production technolo-gies to reduce costs, weight and dimensions but main-tain the performance characteristics of the M Series.

3. Introduction of high speed high power S series(Fig. K).

4. Additions to the range of distributors; introductionof the B5 valve for 2-speed circuits.

5. Introduction of the 9 piston T series motors forapplications that require very steady and flat torqueoutput at low speeds (Fig. L).

6. Introduction of L9 series increases maximum avail-able displacement up to 736 cu in/rev.

7. Introduction of hollow through shaft motors.

8. 1993: The design of cylinder trunnions is modifiedto provide better lubrication of bushings. This signifi-cantly reduces friction, heat buildup and bushing wear-ing and improves back-pressure and high operatingpower motor characteristics (Fig. M).

Fig. H

Fig. I

Fig. J

Fig. M

Fig. K Fig. L

SAI Hydraulics, Inc.3905 W. 9th StreetTrainer, PA 19061(610) 497-0190 Fax (610) 497-0194

SAI Hydraulics Canada Ltd.6105 Boulevard CoutureSt. Leonard, PQ H 1P3G7(514) 323-4552 Fax (514) 323-8780

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