SkyTrak 8042 Service Manual - Manual (Page 810)

9.219 Model 8042, 10042, 10054 Legacy Rev. 10/03
Electrical System
9.13 CAB HEATER AND FAN (OPTION)
9.13.1 Cab Heater Controls
Note: If the suspect component is found to be within the
heater box, the heater box must be removed as a
complete unit and replaced. For additional information
on the removal and installation of the heater box, refer to
Section 4.4.4, a. “Heater Assembly Removal.”
The cab heater controls are located directly below the
switch banks on the right side dash panel. The control
panel (10) consists of a variable speed fan control
knob (11) and a temperature control knob (12).
a. Cab Heater Controls Removal
Note: After determining which control knob is not
functioning, remove only the suspect control knob. In
order to remove either knob, the cab heater and fan
control panel must be removed from the dash panel.
1. If the vehicle has one battery, disconnect the
negative (-) battery cable at the negative (-) battery
terminal (1).
If the vehicle has dual batteries, disconnect both
negative battery cables from both negative (-) battery
terminals (2).
2. Remove the setscrew (13) from the variable speed
fan control knob (11) or temperature control
knob (12).
3. Remove the right side control panel (18) screws.
4. Remove the screws and backing locknuts (14, 15, 16
and 17) from the cab heater and fan control
panel (10).
5. Pull the control panel out from the dash panel, and if
removing variable speed fan control, remove the cab
harness connector.
6. If removing the temperature control knob, disconnect
the cable connector and remove control knob.
7. Remove the hex locknut from the suspect control
shaft.
8. Remove the control from the panel.
b. Disassembly
DO NOT disassemble the cab heater and fan controls.
The controls are not serviceable. Replace controls if
found to be defective.
c. Cleaning and Drying
Without submerging the variable speed fan control, clean
the control with an approved solvent and dry with a clean,
lint-free cloth.
d. Inspection and Replacement
For additional information refer to Section 9.7.47, “Heater
Circuit and Troubleshooting (Option).”
e. Installation and Testing
1. Check that the variable speed fan control (11) is in
the OFF position.
2. If installing the temperature control (12), attach the
control cable (not shown) to the back of the control.
3. Insert the control shaft through the panel, ensuring
that the knob is in the VERTICAL position.
4. Install the hex locknut on the shaft and tighten.
5. Connect the cab harness connector to the variable
speed fan control.
6. Install the screws and backing locknuts (14, 15, 16
and 17), securing the control panel to the dash
panel.
7. Install the setscrew (13), securing the knob to the
control.
8. Install the right side control panel screws (18).
9. If the vehicle has one battery, connect the
negative (-) battery cable to the negative (-) battery
terminal (1).
If the vehicle has dual batteries, connect both
negative battery cables to both negative (-) battery
terminals (2).
MA8700
11 12
13
14
15
16
17
18
10