(2) Disconnect the coolant hose (14, fig. 32)
from the water pump. Remove the tube
(18) and adapter (19) from the water
pump.
(3) Remove the generator-fan belt as
directed in paragraph 67b.
(4) Remove the four screws and lockwashers
that secure the fan to water pump shaft;
remove fan.
(5) Remove the screw that connects the
generator adjusting strap (12, fig. 25) to
the water pump; remove the strap.
(6) Remove the two screws and lockwashers
and the two nuts and lockwashers that
secure the water pump to engine block;
remove water pump and gasket.
b. Cleaning and Inspection.
(1) Clean the outside of the water pump with
a cloth dampened in cleaning solvent;
wipe dry.
(2) Inspect the water pump for cracks,
breaks, stripped threads, or other
damage.
Replace or refer to higher
authority if damaged. Inspect the gasket
for damage; replace if damaged.
c. Installation. Installation of the water pump is the
reverse of the removal procedure described in a
above.
Observe the following special
instructions:
(1) W hen installing the generator adjusting
strap (12, fig. 25), do not fully tighten the
Figure 32. Coolant piping, exploded view.
screw until after the generator-fan belt has
been adjusted.
b. Testing.
(2) Adjust the generator-fan belt (para 67a):
(3) Refill the coolant system.
(1) Suspend the thermostat in water as shown
in figure 33.
75. Thermostat
(2) Heat the water. If the thermostat valve
a. Removal.
does not open when the water is between
(1) Drain the coolant system to a level below
1500 and 1850 F., the thermostat is
cylinder head.
defective.
(2) Loosen hose clamp (1, fig.
32) and
c. Installation. Installation of the thermostat is the
remove radiator hose (2) from thermostat
reverse of the removal procedure described in a
housing (5, fig. 25).
above.
Observe the following special
(3) Disconnect the copper tube (18, fig. 32)
instructions:
from the thermostat housing.
(1) Apply pipe joint sealer to the threads of
(4) Loosen the hose clamp (7) and remove
the coolant bypass piping.
the hose (8) from the inlet tee (13) and
(2) Refill the coolant system.
from the bypass piping. Using a pipe
wrench, remove the coolant bypass piping
76. Radiator Service
(3 through 6) from the thermostat housing.
a. The radiator or heat exchanger consists of a
(5) Remove the two nuts and lockwashers
series of copper tubes through which the coolant
that secure the thermostat housing to the
water is circulated. In standard radiator design
cylinder head; remove the thermostat
housing, thermostat, and gasket.
TAGO 6358-A
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