POWER TRAIN RT880E SERVICE MANUAL
7-22 Published 11-10-2014, Control # 524-00
a torque wrench is essential for preventing leaks around
the head gasket.
Water Pump
The pump should be checked carefully for leaks and proper
lubrication. Replace or rebuild if leaking, cracked, or worn.
Fans and Belts
The fan should be checked for cracked or broken blades.
Refer to Engine Drive Belt, page 7-3.
Thermostat
The thermostat is of the nonadjustable type and is
incorporated in the cooling system for the purpose of
retarding or restricting the circulation of coolant during
engine warm up. Engine overheating and loss of coolant is
sometimes due to an inoperative thermostat. To check for
this condition, remove the thermostat and test by
submerging it in hot water and noting the temperature at
which the thermostat opens and closes. Use an accurate
high temperature thermometer for making this test.
Hoses and Clamps
Hoses and their connections must be checked regularly
because they are often the source of hidden trouble. Hoses
may often times appear in good condition on the outside
while the inside will be partially deteriorated. If there are any
doubts about a hose doing its job, replacement should be
made. The clamps should be inspected to make sure they
are strong enough to hold a tight connection.
Test Equipment
The antifreeze/coolant concentration must be checked using
a refractometer. “Floating ball” type density testers or
hydrometers are not accurate enough for use with heavy
duty diesel cooling systems.
Antifreeze/Coolant
Heavy duty diesel engines require a balanced mixture of
water and antifreeze/coolant. Fill the system with a AFC-50/
50 blended, fully formulated extended life antifreeze/coolant
at all times. Refer to Lubrication, page 9-1. Do not use more
than 50 percent antifreeze/coolant in the mixture unless
additional freeze protection is required. Never use more than
68 percent antifreeze/coolant under any condition.
Antifreeze/coolant at 68 percent provides the maximum
freeze protection; antifreeze/coolant protection decreases
above 68 percent.
Radiator Removal and Installation.
Removal
1. Set the outriggers and position the boom to over the
side.
2. Open the drain cock at the bottom of the radiator and
drain the coolant into a suitable container. Dispose of the
coolant in accordance with local and EPA regulations.
NOTE: Remove the radiator cap when draining the system
to ensure proper draining.
3. Open and remove the hood top door assembly.
4. Remove the bolts and nuts holding the rear engine hood
panel to the engine hood. This will gain access to the
rear of the radiator and the surge tank mounting hard-
ware.
5. Tag and disconnect the hoses from the surge tank to the
engine and from the surge tank to the radiator.
6. Remove the four bolts, washers, lockwashers and nuts
holding the surge tank to the frame.
7. Remove the baffles on the rear side of the radiator
assembly.
8. Remove the hose clamps and bellows connecting the
radiator to the charge air cooler tubes.
9. Remove the hose clamps and radiator hose connecting
the radiator to the radiator tubes.
10. Disconnect the coolant level harness from the engine
harness.
11. Remove the bolts and washers attaching the fan guard
to the shroud ring. Remove the fan guard.
12. Remove the bolts, washers and lockwashers that con-
nect the plates to the top of the radiator and the top of
the frame rail.
NOTE: The radiator assembly weighs approximately
271 lb (123 kg).
13. Attach an adequate lifting device to the radiator assem-
bly.
14. Remove the two bolts, washers, lockwashers, nuts and
mounting bushings securing the radiator flange to the
frame mounting brackets. Remove the radiator assem-
bly from the carrier.
15. Remove the six bolts, washers, lockwashers and six
bushings securing the shroud ring to the radiator.
16. If a new radiator is to be installed, remove all fittings and
hoses from the old one and install them in the same
locations on the new one.
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