HYDRAULIC AR 4804356 - Caterpillar

Keep all parts clean from contaminants.Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.
Disconnect any attachment tools from the quick coupler.
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Remove bolts (1) and cover (2) .
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Remove bolts (3) and cover (4). Disconnect hose assemblies (5), (6), and (7) .
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Remove pins (9). Remove coupler cylinder (8) .Disassembly and Assembly Information
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     195-4609     Seal Pick     1    
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.
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(2) Tighten the nut to a torque of 68 7 N m (50 5 lb ft). (1) Install new seals. Lubricate the seals with the lubricant that is being sealed.Installation Procedure
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Position coupler cylinder (8) and install pins (9) .
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Connect hose assemblies (5), (6), and (7). Position cover (4) and install bolts (3) .
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Position cover (2) and install bolts (1) .