JLG 723A Service Manual - Manual (Page 141)

9.33 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
Electrical System
a. Removal
1. Park the machine on a firm, level surface with the
machine level, retract and level the boom. Place the
transmission control lever in the (N) NEUTRAL
position and engage the parking brake. Shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Allow the engine and all system fluids to cool.
4. Properly disconnect the battery.
5. Remove the nuts and the lockwashers from the
washer mounting studs.
6. Pull the washer reservoir out and away from the
mounting studs.
7. Rotate the washer reservoir, label and remove the
cab harness connectors from the washer reservoir
connectors.
8. Remove the windshield washer hoses from the
reservoir.
b. Disassembly
DO NOT disassemble the pump. The pump is not
serviceable. Replace pump if found to be defective.
c. Installation and Testing
1. Connect the windshield washer hoses to the
reservoir.
2. Connect the cab wiring harness connectors to the
reservoir connectors.
3. Install the reservoir tank onto the mounting studs.
4. Install the lockwashers and nuts and secure.
5. Fill the washer fluid reservoir with washer fluid.
6. Properly connect the battery.
7. Close and secure the engine cover.
8. Turn the ignition key switch to the RUN position and
press the washer switch. Verify that fluid is sprayed
on the windshield.
9. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.13 CAB HEATER AND FAN
9.13.1 Cab Heater/Air Conditioning 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 4.4.10, a. “Heater Assembly Removal.”
The cab heater controls are located to the right of the
seat. The control panel consists of a variable speed fan
control knob and a temperature control knob.
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. Park the machine on a firm, level surface with the
machine level, retract and level the boom. Place the
transmission control lever in the (N) NEUTRAL
position and engage the parking brake. Shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Allow the engine and all system fluids to cool.
4. Properly disconnect the battery.
5. Remove the screws and backing locknuts from the
cab heater and fan control panel.
6. Pull the control panel out from the dash panel, and if
removing variable speed fan control, remove the cab
harness connector.
7. If removing the temperature control knob, disconnect
the cable connector and remove control knob.
8. Remove the setscrew from the variable speed fan
control knob or temperature control knob.
MY3370