JLG 4017PS Service Manual - Manual (Page 198)

Electrical System
9-40 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
5. Install the lower dash panel.
6. Properly connect the battery.
7. Close and secure the engine cover.
8. Start engine to verify proper operation of the ignition
switch.
9. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.13.2 Dash Switches
a. Switch Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and 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. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the battery.
5. Pull the frame out of the dash, disconnect the
harness connector to the switch in question and
push the switch out of the frame.
b. Disassembly
DO NOT disassemble the dash switch. Replace a
defective switch with a new part.
c. Inspection and Replacement
Inspect the switch terminals for continuity and shorting in
both the engaged and disengaged positions. Replace a
defective or faulty switch with a new switch.
d. Switch Installation
1. Connect the switch to the cab harness connector.
2. Position the switch over the rectangular switch bezel
and snap into position.
3. Properly connect the battery
4. Start the machine and check the replaced switch for
proper function.
5. Close and secure the engine cover.
6. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.