REPAIR OF COOLING SYSTEM
Section I. DESCRIPTION
A gear in the fan drive adapter, driven by the camshaft
gear, drives a1 pulley. The belts are driven by the
The cooling system for the lift truck engine consists of a
A tank, mounted below, which is an integral part of the
water pump, a fan drive adapter, cooling fan, drive belt
radiator, cools the transmission oil. Capacity of the
radiator, thermostat and connecting hoses.
system is 9 quarts (9.45 liters) of coolant.
6-2. Cooling System Operation
Section II. RADIATOR
(b) Clamp the flushing gun (fig. 6-1) in the upper
(c) Partially close the lower hose to fill the water
The radiator stores coolant and provides cooling
jacket with water.
surfaces for the fan driven air to pass over and lower the
(d) Apply air pressure at 6 psi (0.42 kg/m2)
temperature of the coolant. It is mounted at the rear of
the truck in a cutout in the counterweight. A grille is
maximum and blow out water.
provided to protect the radiator.
(e) Shut off air, fill jacket with water again and
apply air pressure. Repeat until flushing stream runs out
6-4. Radiator, Removal and Disassembly
(f) Disconnect flushing gun. Connect hose to
radiator and install thermostat (TM 10-3930-630-12).
a. Removal. Refer to TM 10-3930-630-12 for
Disassemble the radiator
removal of the radiator.
assembly in numerical sequence as illustrated in figure
b.. Cooling System Fish.
6-5. Radiator, Cleaning, Inspection and Repair
It is not necessary to remove the
a. Flush transmission oil cooler tank (bottom part of
radiator to perform reverse flushing.
radiator) with cleaning solvent and blow out with
Disconnect the upper and lower
radiator hoses and proceed as
b. Brace all fractures and breaks for proper sealing.
If damage is severe, replace the radiator assembly.
c. To clean cooling fins direct a blast of' dry air
(a) Check to be certain radiator cap is tight.
against the real of the radiator core to dislodge dust
(b) Clamp ) flushing gun (fig. 6-1) in the lower hose
which may accumulate due to dusty operating
with a hose clamp.
(c) Turn on the water and fill the radiator.
d. Clean the cooling system to remove lime, scale,
(d) Apply 4iir pressure at 6 psi (0.42 kg/m2)
and other foreign deposits from the cooling system.
maximum gradually, to avoid radiator damage.
e. Refer to TM 10-3930-630-12 and inspect all
(e) Shut off air, fill radiator with water again and
hoses and fittings for signs of deterioration, and replace
apply air pressure. Repeat until the flushing stream runs
6-6. Radiator, Reassembly and Installation
(f) Clean and inspect radiator cap. Replace if
a. Reassembly. Reassemble the radiator in the
damage is noted. Radiator cap must maintain 7 psi in
reverse of numerical sequence as illustrated in figure 6-
(2) Water Jacket.
b.. Installation. Refer to TM 10-3930-630-12 and
(a) Refer to TM 10-3930-630-12 and remove the
install the radiator.
thermostat and disconnect upper hose and lower hoses