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At operating temperature, the hydraulic tank is hot and under pressure. Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure. |
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Personal injury can result from the sudden release of high pressure oil. Be sure the engine has been shut off for a minimum of five minutes to be sure that the accumulator pressure is zero. The accumulator is filled with dry nitrogen. Do not loosen or remove the valve or cap from the top of the accumulator. A bleed screw at the bottom of the accumulator can be used to release the pressure that is left in the system. |
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. |
Note: Turn off the engine. Apply the foot brake valve several times in order to relieve the pressure in the brake system.
- Put identification marks on all lines, hoses, wires, and tubes for installation purposes. Plug all lines, hoses and tubes. This helps prevent fluid loss and contamination of the oil system.
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Illustration 1 g00460536 - Remove five bolts (1) and the washers that secure cover (2) to the back of the cab. Note the position of each mounting bracket for installation purposes.
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Illustration 2 g00460569 - Loosen retaining nut (3) that secures the hydraulic hose to the brake accumulator. Loosen retaining nut (4) that secures the hydraulic hose to the brake accumulator. Place hydraulic hoses (5) aside.
- Remove four bolts (6), the washers and the nuts from the mounting brackets for the accumulator assembly. Remove the accumulator assembly for the brake from the cab.
- Remove two nuts (7) and the washers from each clamp assembly that secures six accumulators (8) to the plate. Disconnect the hydraulic hoses, the elbows, the tees and the seals from the top of each accumulator. Place each accumulator aside.
- Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.
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Illustration 3 g00460602 - To seal the tees and the elbows to the accumulator, use the appropriate O-Ring seal (10). To seal the hydraulic hoses to the tees and the elbows, use the appropriate O-ring seal (9). Connect the hydraulic hoses, the elbows, and the tees to the top of each accumulator, as shown. Install two nuts (7) and the washers to each clamp assembly that secures six accumulators (8) to the plate.
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Illustration 4 g00460569 - Position the accumulator assembly on the cab, as shown. Install four bolts (6), the washers and the nuts to the mounting brackets for the accumulator assembly.
- Connect hydraulic hoses (5) to the top of the accumulators. Tighten retaining nut (4) that secures the hydraulic hose to the brake accumulator. Tighten retaining nut (3) that secures the hydraulic hose to the brake accumulator.
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Illustration 5 g00460536 - Install five bolts (1) and the washers that secure cover (2) to the back of the cab.
