Removal Procedure
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Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed. Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death. Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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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, "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. |
Note: Put identification marks on all lines, on all hoses and on all wires for installation purposes. Plug all lines and all hoses. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
- Before removing the shutoff valve at the rear, install suitable cribbing on both sides of the machine between the chassis and the rear axle.
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| Illustration 1 | g00946143 |
- Disconnect two hoses (1) from lock valve (2) .
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| Illustration 2 | g00946144 |
- Disconnect harness (3) from solenoid (4) .
- Remove four bolts (5) and the washers in order to remove lock valve (2) from cylinder (6) .
- Remove two O-ring seals (not shown) from the mating face of lock valve (2) .
Installation Procedure
- Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.
- Install new O-ring seals (not shown) into the mating face of lock valve (2) .
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| Illustration 3 | g00946144 |
- Position lock valve (2) on cylinder (6) and install four bolts (5) with the washers.
- Connect harness (3) to solenoid (4) .
- Connect two hoses (1) to lock valve (2) .
- Remove the cribbing that was installed in the removal procedure from both side of the machine between the chassis and the rear axle.
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| Illustration 4 | g00946143 |