ENGINE AR-PRIMARY 4537804 - Caterpillar

Removal Procedure
Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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.
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.
Illustration 1 g01172704
Remove bolts (2) and cover (1) .
Illustration 2 g01172707
Hold spool (4) in place and remove nut (5). Turn spool (4) counterclockwise until spool (2) stops. This will relieve the pressure in telescoping cylinder (3) .Note: Count the number of turns of spool (4) in order to aid in the assembly.
Remove load control valve (6) .Installation Procedure
Illustration 3 g01172707
Install load control valve (6) into telescoping cylinder (3). Tighten load control valve (6) to a torque of 100 N m (75 lb ft).
Turn spool (4) clockwise for the number of turns that was recorded in the removal procedure. Hold spool (4) in place and install nut (5).
Illustration 4 g01172704
Install cover (1) and bolts (2) .