7-20
Published 01-14-2021 Control # 707-01
POWER TRAIN
TMS9000-2 SERVICE MANUAL
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 50/50
blended, fully formulated extended life antifreeze/coolant at
all times. Refer to Lubrication section. 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 Assembly Removal and Installation
Removal
Refer to (Figure 7-13).
1.
Set the outriggers and position the boom to over the
side.
2.
Disconnect the battery.
3.
Open the drain cocks (3) 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.
4.
Open the left and right hood access doors.
5.
Disconnect the hoses (12) from the coolant recovery
tank (2) and remove the tank.
6.
Remove the hardware securing the top center hood
panel to the front and rear cowls and remove the panel
with doors from the crane.
7.
Remove the hardware securing the left and right lower
side panels to the front cowl.
8.
Remove the hardware securing the front grill panel to
the front cowl and remove the grill.
9.
Remove the hardware securing the front cowl and
remove the front cowl.
10.
Disconnect the CAC hoses from the air cooler assembly.
11.
Disconnect the hoses from the top and bottom of the
radiator assembly.
12.
Remove the bolts, washers, and lockwashers attaching
the fan guard to the shroud. Remove the fan guard.
NOTE:
The radiator assembly weighs approximately 116
kg (256 lb).
13.
Attach an adequate lifting device to the radiator/air
cooler assembly.
14.
Remove the nuts, hardened washers and mounts
securing the radiator/air cooler assembly to the
mounting brackets and remove the assembly from the
carrier.
Installation
Refer to (Figure 7-13).
1.
Position the radiator/air cooler assembly in the carrier
using a lifting device and secure to the mounting
brackets using the mounts, hardened washers, and
nuts.
2.
Position the fan guard on the shroud and secure with
bolts, washers, and lockwashers.
3.
Connect the air cooler tubes to the air cooler using the
bellows and clamps. Tighten the clamps to 4 to 5 Nm (35
to 45 in-lb).
4.
Connect the hoses to the top and bottom of the radiator.
5.
Make sure that the drain cock is closed.
6.
Position the front cowl on the frame and secure with the
attaching hardware.
7.
Position the front grill panel on the front cowl and secure
with the attaching hardware.
8.
Attach the left and right side lower panels to the front
cowl with the attaching hardware.
9.
Position the top center panel, with doors attached, on
the front and rear cowl and secure with the attaching
hardware.
Fo
r
Reference
Only
