JLG G6-42A Service Manual - Manual (Page 172)

Electrical System
9-16 G6-42A, G9-43A, G10-43A
9.7.2 Alternator—LS
a. Alternator Removal
1. Park machine on a firm, level surface, level machine,
fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL, engage park brake
and shut engine OFF.
2. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
3. Open engine cover. Allow system fluids to cool.
4. Properly disconnect the battery.
5. Loosen hardware (3) securing alternator to support
bracket on engine.
6. Slide alternator toward engine to relieve tension on
fan belt. Remove fan belt.
Note: Record how the alternator is installed to ensure
correct installation later.
7. Label and disconnect the wire leads attached to the
alternator assembly.
8. Remove lower mounting hardware securing
alternator to lower mounting hole on engine.
9. While supporting alternator with one hand, remove
upper mounting hardware from upper alternator
mount. Remove alternator from machine.
b. Alternator Installation
1. Reinstall alternator with hardware removed earlier.
DO NOT tighten completely at this time.
2. Route fan belt onto alternator and engine pulleys.
3. Alternator will pivot in bracket away from engine to
apply tension to belt. Tighten hardware securing
alternator to engine and mounting bracket.
4. Check for proper belt alignment. (Refer to the
appropriate Operation & Safety Manual.)
5. Connect previously labeled wire leads to alternator.
6. Properly connect battery.
7. Close and secure engine cover.
8. Remove the Do Not Operate Tags from both ignition
key switch and steering wheel.
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