SkyTrak 6036 Service Manual - Manual (Page 317)

Section 10. Electrical System
10-55 Model 6036/6036T S/N 9B0500 thru 14833
c. Cleaning and Drying
1. Clean the interior of the heater core by con-
necting a hose to the inlet and flushing the
core with water.
2. Soak the exterior of the heater core in a
detergent solution and then flush the coil with
water from a hose.
3. Allow the core to air dry.
4. Clean all parts of the heater housing with
detergent in water, rinse and dry using a clean
lint-free cloth.
d. Inspection and Replacement
1. Straighten bent fins using a duckbill pliers.
2. Test the heater fan motor for free rotation of
the shaft. If the shaft is binding, lubricate
bushing area using a few drops of an ap-
proved oil for small electric motors. Manually
turn the shaft to work the oil into the bushings.
3. Test the motor by connecting a fused or
protected 6 A minimum output, 12 Vdc power
supply to the motor terminals using short
heavy gauge wires.
4. If the motor doesn’t run prepare to replace it
by removing the nuts and lock washers which
secure the motor to the heater.
5. Position the new motor on the heater and
install the lock washers and nuts which secure
it to the heater.
6. Pressure test the heater core for leakage and
replace core if defective or in marginal condi-
tion.
e. Assembly
1. Position core (23, Fig. 10.42) in the heater and
install four sheet metal screws (24).
2. Position fan mounting bracket (22) on heater
and install four sheet metal screws (21).
f. Installation
1. If negative (–) cable (2, Fig. 10.16) had been
reconnected to the batteries, disconnect this
cable.
2. Position the heater and fan unit in the forklift.
3. Connect hoses (20, Fig 10.42) and install and
tighten clamps (14).
4. Open valve (13).
3. Connect wiring to switch (11).
4. Slide heater and fan unit (7) into position.
5. Install two spacers (6), lock washers (5) and
capscrews (4).
6. Install two tooth-type grounding lock washers
(3), lock washers (2) and capscrews (1).
7. Connect negative (–) cable (2, Fig. 10.16) to
the batteries.
8. Test heater fan motor operation.
10.12.2 Heater Fan Motor and Coil
(Enclosed Cab Only)
a. Removal
1. Disconnect negative (–) cable (2, Fig. 10.16)
from the batteries.
2. Remove two capscrews (1, Fig. 10.42), lock
washers (2), and tooth-type grounding wash-
ers (3).
3. Remove two capscrews (4), lock washers (5)
and spacers (6).
4. Slide heater and fan unit (7) forward to provide
access to the cab heater motor and hose
connections.
5. Tag and disconnect wiring from motor.
6. Open valve (13) at the left corner of the
engine.
7. Place a clean container under the engine drain
plug. Drain the coolant by venting the radiator
and removing the engine drain plug.
8. At the cab heater loosen clamps (14) and
disconnect hoses (20).
9. Remove heater and fan unit (7) from forklift
and place it on a clean bench.
b. Disassembly
1. Disassembly of the heater unit is not required.
However, if you intend to clean the heater
core, remove four sheet metal screws (21, Fig.
10.42) and the fan mounting bracket (22).
IMPORTANT: Handle core (23) with care to avoid
damaging the delicate fins.
2. Remove four sheet metal screws (21) from the
front of the heater and lift the heater core from
the heater.