MCC Heater and Air Conditioner 10. Remove the washer that is positioned on top of the plastic bushing. 11. Tag and disconnect the two electrical connectors from the thermostat. See Figure 21. 12. Loosen the hose clamp that retains the top heater hose to the water valve inside the heater/air conditioner assembly and disconnect the heater hose. 13. Remove the temperature switch from the evaporator core. See Figure 24.
0100 YRM 1459 2. Install the nut and washer located outside the heater/air conditioner assembly to retain the thermostat inside the heater/air conditioner assembly. 3. Install the temperature switch to the evaporator core. See Figure 24. 4. Connect the top heater hose between the water valve and heater core to the water valve and tighten the hose clamp. 5. Connect the two electrical connectors to the thermostat. See Figure 21. NOTE: Make sure the nylon bushing and washer are correctly positioned inside the heater/air conditioner assembly. 6. Position the top cover on the heater/air conditioner assembly and make sure the pin at the underside of the vent door is positioned in the washer and nylon bushing. 7. Install the 12 screws to retain the top cover to the heater/air conditioner assembly. 8. Connect the electrical connector on top of the top cover to the actuator that controls the vent door position. See Figure 20. 9. Swing the heater/air conditioner assembly up toward the cab and install the three capscrews to retain the heater/air conditioner assembly to the cab. See Figure 19. 10. Lower the cab to the fully lowered and latched position. Refer to the section Raising and Lowering Cab.
1. TEMPERATURE SWITCH Figure 24. Temperature Switch
11. Start the engine and check for leaks. Add coolant as needed. Refer to Periodic Maintenance manual for your lift truck.
14. Remove the nut and washer located outside the heater/air conditioner assembly that retains the thermostat inside the heater/air conditioner assembly.
12. Turn the recirculation knob a few times from the fully open position to the fully closed position to be sure that the recirculation system functions correctly. See Switch Locations.
15. Remove the thermostat and temperature switch from the heater/air conditioner assembly.
Water Valve
Install 1. Position the thermostat and temperature switch inside the heater/air conditioner assembly and correctly route the temperature switch. 24
Remove 1. Turn the key switch to the ON position.