MAXX 450D/470D/Diesel Page 9-5
HydraMaster Corporation
8.0. Engine overheats
8.1. Poor ventilation in vehicle. All cargo area doors must be open for proper ventilation.
Roof vents are strongly recommended for machines that are operated in hot climates. Any
item that might restrict air flow to the machine such as other equipment or a solid divider
between cargo and passenger areas should be moved or modified to permit proper air flow.
8.2. Low engine coolant level. Check coolant level. If low, check for source of leak and
repair before replenishing coolant.
8.3. Fan belt loose or broken. Check belt. Adjust or replace as necessary.
8.4. Engine coolant thermostat is stuck closed. Remove thermostat and test. Replace as
necessary.
8.5. Radiator is clogged with debris. Inspect radiator. Clean as necessary.
8.6. Low engine oil level. Check oil level and replenish as necessary.
8.7. Engine RPM too high. Check RPM with an accurate tachometer. Adjust as necessary.
8.8. Restricted engine or blower exhaust. Disassemble exhaust components to locate
restriction. Repair as necessary.
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