Serv

ice

Man

ual

Service Manual

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF CATERPILLAR OR IT’S SUCCESSORS. CATERPILLAR AND IT’S SUCCESSORS ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

Cable Control 126 S/n 32E1 & Up

CT-S-CC126

Clutch

CABLE CONTROL SPECIFICATIONS

Specifications

SD-300

Over-all width of 6 new discs and 7 new disc assemblies 1.844 - 1.906 in. Minimum over-all width of 6 discs and 7 disc assemblies (Worn) 1.344 in.

Main Drive Shaft End clearance

Cable Drum Bearings Bearing preload:

Shims to be removed after end clearance taken up .. Or, torque to rotate at drum diameter ..

Bevel Gear Bevel gear and pinion backlash, minimum Bevel pinion bearing preload:

Torque required to rotate bevel pinion without seals installed

.002 - .010 in.

.008 - .010 in. 28 - 30 Ibs.

.010 in.

.05 - 2.0 lb. in.

Group 40

Page I

5D-300 CABLE CONTROL

OPERATION AND LUBRICATION

Group 70

Page I

Operation and Lubrication OPERATION

It is possible to remove and replace many parts in the cable control case assembly without having to remove the whole unit from the tractor.

These major parts are as follows: The brake band, the cable drum and clutch disc assembly, the hub and bearing assembly, the clutch inner drum, the pressure plate, the clutch lever, the engagement nut and screw assembly, the drive gear and main drive shaft.

The cutaway and cross section illustrations of the cable control show the operating mechanism. The roller (3) on the clutch lever (5) is in contact with the curved brake lever (4), which is linked to the brake band (8) and the brake spring (2). This mech­anism synchronizes the application of the brake and clutch release.

T56164

CABLE CONTROL (Right Side Cutaway View)

I-Clutch lever return spring. 2-Brake spring. 3-Roller. 4-Brake lever. 5-Clutch lever.

When the operator's control lever is in the neutral position, the spring (1) holds the clutch in the re­leased position and the spring (2) holds the brake in the engaged position.

Cable is spooled onto the drum when the control lever is moved to the clutch engaged position. In this position, the engaging mechanism turns the clutch engagement screw (9) in to engage the clutch (7) thereby turning the cable drum (6).

CABLE CONTROL (Rear View)

6-Cable drum. 7-Clutch. 8-Brake band. 9-Clutch engagement screw.

8

The caple drum is held by the self energlZlng brake when the contrOl lever is in the neutral posi­tion. Cable is unspooled from the drum when the control lever is moved to the brake released posi­tion. The control lever can be moved to the extreme brake released position where it is held in the lock­out position permitting the drum to be turned by hand with the: engine stopped.

LUBRICATION The cable control is splash-lubricated by action of

the input drive gear. Oil is carried up by the input drive gear and idler to the bearings and the main shaft drive gear. A passage in the housing allows the oil to return to the oil sump located in the bevel gear compartment of the cable control housing.

CABLE DRUM AND SHAFT BEARING LUBRICATION I-Main drive shaft bearings. 2-0il seal. 3-Hole in cable drum. 4-Bearing retainer.

5-Drilled hole in bearing retainer.

S-Cable drum. 7-Cable drum bearings. 8-Clutch inner drum.

Over

50-300

CABLE CONTROL CLUTCH AND BRAKE MECHANISM

Group 80

Page I

Clutch and Brake Mechanism BRAKE BAND ASSEMBLY

The brake band assembly can be removed while the cable control is mounted on the tractor. However, for illustration purposes the cable control is shown mounted on a floor stand.

Removal and Installation

PREPARING TO REMOVE COVER ASSEMBLY

o Remove

I-Bolts (eleven). 2-Clamp bolt. 3-Cover assembly.

1. Loosen the clamp bolt (2), spread the clamp and remove the cover assembly (3) as shown.

if-~J~ ,. I

A." !!""

T5 6144

REMOVING COVER ASSEMBLY

2. Compress the brake spring (4) and insert an !fa/l cotter pin, as shown, to hold the brake spring in the compressed position.

3. Remove the bolts (II) which secure the brake lever bracket (7) to the cable control housing.

4. Remove the brake band assembly as shown.

COMPRESSING BRAKE SPRING . 4-Brake spring.

PREPARING TO REMOVE BRAKE BAND ASSEMBLY

• Disconnect 0 Remove

5-Pin. 6-Control rod linkage. 7-Brake lever bracket. S-Return spring anchor bracket. 9-Clutch lever. IO-Pin.

11-Bolts (three).

REMOVING BRAKE BAND ASSEMBLY

5. Install the brake band assembly in the reverse order of removal.

6. Install the cover (3) and tighten the bolts (1) just enough to position the cover.

5D-300 Group 80

Page 2 CABLE CONTROL CLUTCH AND BRAKE MECHANISM

7 TIghten the clutch adjusting clamp bolt (2) securely.

8. Bump the cover (3) with a soft hammer. This will center the cover with the drive shaft.

9. Tighten the bolts (1) securely.

10. Loosen the clutch adjusting clamp bolt (2), make any necessary clutch adjustment, and retighten the clamp bolt.

II. Adj ust the brake as described in the topic, BRAKE ADJUSTMENT.

Disassembly and Assembly

T56748

BRAKE LEVER ASSEMBLY REMOVAL

o Remove

I-Brake spring assembly. 2-Pin. 3-Brake linings. 4-Brake lever assembly.

T56149

DISASSEMBLY OF BRAKE LEVER ASSEMBLY

o Remove

5-Shaft retainer.

Remove the shaft (6) and brake lever bracket (8). Inspect the bearings (7). Replace all worn or dam~ aged parts.

156150

DISASSEMBLY OF BRAKE LEVER ASSEMBLY 6-Shaft. 7-Bearings (two). 8-Brake lever bracket.

Inspect the linings (3) for wear; replace if neces­sary by removing the rivets which secure the lin­ings to the band and installing new rivets and linings.

Assemble in the reverse order of disassembly.

CLUTCH ENGAGEMENT MECHANISM

Removal and Installation

1. Remove the brake band assembly. See the topic, BRAKE BAND ASSEMBLY.

2. Remove the bolts securing the outer bearing retainer (2) to the clutch engaging screw (1)

and use two of the bolts as forcing screws to remove the outer bearing retainer.

PREPARING TO REMOVE OUTER BEARING RETAINER I-Clutch engaging screw. 2-0uter bearing retainer.

5D-300 CABLE CONTROL

CLUTCH AND BRAKE MECHANISM

Group 80

Page 3

3. Inspect the O-ring seal (3) on the outer bear­ing retainer (2) and replace if necessary.

OUTER BEARING RETAINER REMOVAL

o Remove

2-0uter bearing retainer. 3-0·ring seal. 4-Retainer.

4. Remove the clutch engagement mechanism (5) as shown.

CLUTCH ENGAGEMENT MECHANISM REMOVAL S-Clutch engagement mechanism. 6-Seal.

5. Inspect the seal (6) and replace if necessary. The lip of the seal (6) must face toward the out­side of the cable control.

NOTE

When the clutch engagement mechanism is in­stalled, the bearing inner race (7) should extend slightly beyond the end of the shaft (9) to insure tightness of the retainer (8) and bolts. However, if this overlap is too great. the retainer (8) can be distorted when the bolts are tightened. This distortion can cause the bolts to break. The proper overlap is obtained by inserting shims (10) between the end of the shaft (9) and the re­tainer (8).

6. Install the retainer (8) on the clutch shaft (9) without shims and draw tight.

INSTALLING RETAINER AND SHIMS 7-Bearing inner race. 8-Retainer. 9-Shaft. ID-Shims.

7. Remove the retainer.

8. Measure with a depth micrometer, as shown, the distance (A) from the end of the clutch en­gaging screw (1) to the end of the bearing inner race (7).

.INSTALLING CLUTCH ENGAGEMENT MECHANISM I-Clutch engaging screw. 7-Bearing inner race.

9-Shaft.

9. Measure the distance (B) from the end of the clutch engaging screw (1) to the end of the shaft (9) and obtain the difference between the two measurements.

10. Install the retainer and bolts on the shaft, with sufficient shims to give the clearance shown in the topic, SPECIFICATIONS, between the retain­er and the end of the shaft (9).

II. Install the outer bearing retainer (2).

12. Install the brake band assembly. See the topic, BRAKE BAND ASSEMBLY.

13. Adjust the clutch and brake. See the topic, CLUTCH AND BRAKE ADJUSTMENTS.