154400-9420 ZEXEL 9 421 618 703 BOSCH DIAPHRAGM 9421618703 1544009420 1157120070

GENERAL
Specifications
Construction
Cooling System Component Parts(1) Cooling fan(2) Water pump pulley(3) Water pump assembly(4) V-belt(5) Thermostat(6) Thermostat fitting(7) Thermoswitch(8) Bypass pipeFAN AND FAN BELT
Fan Belt Inspection
For fan belt tension, see 0-06 MAINTENANCE.
Inspecting Fan BeltFan Inspection
Check the fan for cracks, damaged and deformation. If any, replace the fan.
Inspecting FanWATER PUMP
Removal and Installation
(1) Remove the fan and fan belt.(2) Remove the water pump.(3) When installing the water pump, reverse the above-mentioned order of removal.
Removing Water PumpInspection
Check the water pump for water leak, rough rotation, and cracks. If any, replace the water pump assembly.THERMOSTAT
Removal and Installation
Pay attention to the following:(1) Never allow the flange to protrude from the faucet joint.(2) Renew the gasket.
Installing ThermostatInspection
If the thermostat does not operate properly, replace it.
Inspecting Thermostat WATER TEMPERATURE GAUGE UNIT AND THERMOSWITCH
Inspection of Water Temperature Gauge Unit
If the gauge does not function properly, replace it.
Inspecting Temperature Gauge Unit CAUTION Handle hot oil with special care not to cause a scald or a fire.Inspection of Thermoswitch
Inspecting Thermoswitch CAUTION Handle hot oil with special care not to cause a scald or a fire.