Perform the procedures in "Brake Release (Manual)" in order to release the brakes. These procedures are only effective when the machine is raised. Access to the forcing bolt holes of the brakes is not possible unless the pendulum arms are fully lowered. The cover is located on the inside of the pendulum arm.
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| Illustration 1 | g00596044 |
Typical Example | |
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| Illustration 2 | g00861272 |
Typical Example | |
Before the procedures in "Brake Release (Manual)" are performed, raise the machine and place suitable cribbing and/or jack stands under the machine. Lower the machine onto the cribbing and/or the jack stands.
If access to the forcing bolt holes of the brakes is not possible, perform the procedures in "Brake Release (Auxiliary Hydraulics)" to release the brakes. These procedures use an auxiliary hydraulic pump to hydraulically release the brakes.
Brake Release (Manual)
Four-Wheel Drive Machines
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 1U-9895 | Crossblock | 4 |
| B | 6V-9667 | Bolt (M20 X 100) |
4 |
| 6V-7742 | Full Nut (M20) |
4 | |
| 8T-3282 | Hard Washer | 4 | |
Note: The brakes are spring applied, oil pressure released. If hydraulic pressure is not available, the brakes will not release. Manually releasing the brakes is required. This procedure is only effective when the machine is raised. Access to the forcing bolt holes of the brakes is not possible unless the pendulum arms are fully lowered. The cover is located on the inside of the pendulum arm.
- Turn off the engine. Block the tires of the machine in order to prevent machine movement.
- Remove the four bolts that hold the cover in place. Remove the cover.
- The brakes in the travel motor (1) may be released by using a forcing bolt. The plug (2) covers the hole for the forcing bolt. Remove plug (2) out of travel motor (1) .
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| Illustration 3 | g00818638 |
- Install Tooling (A) and (B) onto travel motor (1).
Insert the bolt through the hole of the crossblock. Thread this bolt into the forcing hole of the travel motor (1). Then, turn the nut. As the nut is turned, the threads of the bolt will engage the piston of the brake. The piston will be pulled back and the brake spring will be compressed. As the piston is pulled back, pressure on the brake pack will be relieved. The brakes are now released.
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| Illustration 4 | g00818396 |
- Repeat Step 2 through Step 4 for the other three pendulum arms.
Six-Wheel Drive Machines
Front Travel Motors
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 1U-9895 | Crossblock | 2 |
| B | 8T-0282 | Bolt (M16 X 120) |
2 |
| 8T-1757 | Nut (M16) |
2 | |
| 9X-8268 | Washer | 2 | |
- Turn off the engine. Block the tires of the machine in order to prevent machine movement.
- Remove the four bolts that hold the cover in place. Remove the cover.
- The brakes in the travel motor (1) may be released by using a forcing bolt. The plug (2) covers the hole for the forcing bolt. The plug is made of rubber. Pry plug (2) out of travel motor (1) .
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| Illustration 5 | g00818588 |
Front Travel Motors | |
- Install Tooling (A) and (B) onto travel motor (1).
Insert the bolt through the hole of the crossblock. Thread this bolt into the forcing hole of the travel motor (1). Then, turn the nut. As the nut is turned, the threads of the bolt will engage the piston of the brake. The piston will be pulled back and the brake spring will be compressed. As the piston is pulled back, pressure on the brake pack will be relieved. The brakes are now released.
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| Illustration 6 | g00818718 |
- Repeat Step 2 through Step 4 for the other pendulum arm.
Rear Travel Motors
Perform the procedures in "Four-Wheel Drive Machines" in order to release the brakes of the rear travel motors.
Brake Release (Auxiliary Hydraulics)
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 9U-6600 | Hand Hydraulic Pump | 1 |
| B | 8T-6776 | Adapter | 1 |
| C | 3J-1907 | O-Ring Seals | 3 |
| D | 6V-8787 | Face Seal Tee | 1 |
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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak. |
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- Release the pressure in the hydraulic system.
- Place wheel chocks in front of the tires and behind the tires.
- Open the hood.
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| Illustration 7 | g00822223 |
- Remove the coupling assembly from one of the hoses on Tooling (A). Attach Tooling (B) to the hose on Tooling (A) .
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Disconnect brake lines (2) and (3) from the brake valve (1) .
The connections of brake lines (2) and (3) are located between the hydraulic tank and brake valve (1) .
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| Illustration 8 | g00822812 |
Note: Cleanliness is an important factor. Before the brake lines are disconnected, the connector of the brake lines should be thoroughly cleaned. This will help to prevent dirt from entering the system.
Note: Put identification marks on the lines for installation purposes. Plug the lines. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
- Install brake lines (2) and (3) to Tooling (C) and (D).
- Install Tooling (A) to Tooling (D) .
Reference: For more information, refer to Special Instruction, SEHS9061.
- Carefully pressurize the brake lines to 1200 to 3000 kPa (175 to 435 psi). The brakes are now released.
| NOTICE |
|---|
Do not allow the oil pressure to exceed 3000 kPa (435 psi) or damage to the travel motor can occur. |