SWITCH AS-ROCKER 1701313 - Caterpillar

Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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.
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: A hydraulic oil sample should be obtained before any maintenance is performed in order to establish the system contaminant level. Refer to Fluid Analysis Laboratory Guide, SEBF3116, "Obtaining an Oil Sample for S O S Analysis". Refer to Operation and Maintenance Manual, "Sampling Intrval and Location of Sampling Valve" for the correct location.
Illustration 1 g00690963
Remove the cap from the hydraulic tank. Attach Tooling (A) to the hydraulic tank. Note: Hook up the air to Tooling (A) in order to create a vacuum in the hydraulic system. This will minimize the leakage from the hose assemblies.
Illustration 2 g00950370
Remove bolts (1) and the washers in order to remove cover (2).
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Remove bolts (4) and the washers in order to remove access cover (3) that is under the main control valve.
Illustration 4 g00694353
Open the drain valve (5) in order to drain the oil for the swing drive.
Drain the oil from the swing drive into a suitable container for storage or disposal. The capacity of the swing drive is approximately 8 L (2.1 US gal).
Illustration 5 g00694459
Typical example
Note: Not all machines will require the removal of hose assemblies and brace (8). Remove the hose assemblies that will make the removal of the swing motor easier.
Remove bolts (9) and the washers in order to remove brace (8). This will allow easier access to the swing motor.
Remove hose assembly (6).
Disconnect hose assembly (7).
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Disconnect hose assemblies (10) and (12).
Remove bolts (14), the washers, and the split flanges.
Disconnect hose assemblies (11).
Remove bolts (15), the washers, and the split flanges.
Disconnect hose assembly (13) and (16).
Remove bolt (17), the washer, and the clip.
Disconnect harness assembly (18).
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Disconnect hose assembly (19).
Illustration 8 g00694484
Remove bolts (21) and the washers in order to remove the anti-reaction valve (22).
Remove bolts (20) and the washers.
Prior to the removal of the swing motor, clean the swing motor and the area around the swing motor. Remove any loose paint around the mating surface of the swing drive and the swing motor in order to prevent contamination from entering the swing drive.
Illustration 9 g00694494
Attach Tooling (B) and a suitable lifting device to swing motor