4. MAINTENANCE 5. Oil Cooler and Cooling Fan Oil returning from the control valve is circulated through the oil cooler before being sent to other parts of the hydraulic system. An engine cooling fan drives air through the oil cooler when the rear door is closed. Refer to Figure 4.7E. The oil cooler should be checked daily for dirt buildup on the cooling fins. If the air flow is restricted through the cooling fins, overheating of the hydraulic system may occur. Clean any dirt buildup with compressed air. Figure 4.7E shows the radiator setup for the loader. C4241 Oil Cooler Fan To avoid eye injury always use safety goggles when cleaning with compressed air. Fig. 4.7E 6.
Brake Service Override A service Override has been incorporated for use by authorized dealers. The normal position of the plunger is down and turned into the locked position (Fig. 4.7F). To release the park brake, turn the release button counter clockwise. Go to the rear of the machine and pressurize the small quick coupler (Fig. 4.7G) to 218 PSI (15 Bar) to release the park brake. Brake Valve Fig. 4.7F C3780 Quick Coupler Fig. 4.7G C3893 49 ING always whe