CORE AS-HYDRAULIC OIL COOLER 1367731 - Caterpillar

Checks for the Implement System
Extend the implement cylinders and retract the implement cylinders several times. Allow the implement cylinders to travel full stroke in each direction.
Watch the cylinder as the cylinder is extended and retracted. The movement of the cylinder must be smooth and regular.
Listen to the hydraulic and steering pump for noise.
Move each control valve into the HOLD position while the implement is off the ground. Watch for cylinder rod drift. If the cylinder moves more than 19.0 mm (0.75 inch) in 60 minutes, then the cylinder drift is excessive. Implement cylinder drift is caused by oil leakage in the following components:
Cylinder piston seals
Line relief valves
Lock valve in the implement control valve
Ball valve in the auxiliary circuitChecks for the Cushion-Hitch System
Extend the load cylinder and retract the load cylinder several times.
The extension of the load cylinder must be smooth and regular. The retraction of the load cylinder must be smooth and regular.
Listen for noise from the cushion-hitch pump.
Allow the load cylinder to extend to full stroke and allow the load cylinder to retract completely. Turn on the cushion-hitch switch. This will activate the cushion ride mode. The rod of the load cylinder will extend. The extension of the rod will occur within approximately 1.0 seconds.