WARNING
Coolant may be very hot and under pressure
from engine operation. Ensure engine is cool
before performing troubleshooting. Failure to
comply may result in injury to personnel.
(1) Remove coolant hose from overflow tank to
radiator (para 6-3).
(2) Place coolant hose in drain pan.
(3) Start engine (TM 9-2320-365-10).
WARNING
NOTE
Coolant flowing constantly through return
hose indicates closed thermostat.
(4) Observe flow of coolant from coolant hose.
(5) If thermostat does not operate properly,
replace thermostat (para 6-5).
(6) Shut down engine (TM 9-2320-365-10).
(7) Install coolant hose on overflow tank and
radiator (para 6-3).
(8) Refill overflow tank to proper level (TM 9-
2320-365-10).
(9) Lower cab (TM 9-2320-365-10).
Change 1 2-137
TM 9-2320-365-20-1
Use care when opening door with cab raised.
Failure to comply may result in injury to
personnel or damage to equipment.
(1) Check water pump for loose hardware and
damage.
(2) If water pump hardware is loose, tighten
hardware.
(3) If water pump is damaged, replace water
pump (para 6-12).
