JLG 4017RS Service Manual - Manual (Page 166)

Electrical System
9-14 3614RS, 4017RS
5. Remove Do Not Operate Tag from ignition key switch
and steering wheel.
9.6.2 Charging Circuit
Before using a battery charger, an attempt can be made to
recharge battery by jump-starting machine (Refer to the
appropriate Operation & Safety Manual). Allow engine to
run, which will enable alternator (2) to charge the battery.
If engine alternator charging warning indicator illuminates,
perform following checks:
1. Check all battery cable connections at battery, and
verify that they are clean and tight.
2. Check external alternator wiring and connections, and
verify that they are in good condition.
3. Check fan belt condition and tension.
4. Run engine and check alternator for noise. A loose drive
pulley, loose mounting hardware, worn or dirty internal
alternator bearings, a defective stator or defective
diodes can cause noise. Replace a worn or defective
alternator.
9.6.3 Alternator
a. Alternator Removal
1. Park machine on a firm, level surface, level machine, fully
retract boom, lower boom, place transmission in the (N)
NEUTRAL, engage parking 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 battery.
5. Install a drive ratchet into square hole in serpentine belt
tensioner bracket. Note Belt routing for future
serpentine belt installation.
6. While lifting automatic belt tensioner away from belt,
remove fan serpentine belt.
Note: Record how alternator is installed to ensure correct
installation later.
7. Label and disconnect wire leads attached to alternator.
8. Remove lower mounting capscrew securing alternator to
lower mounting hole on engine.
9. While supporting alternator, remove upper mounting
hardware from upper alternator mount. Remove
alternator from machine.
b. Alternator Installation
1. Position alternator and align with upper alternator
mount on engine bracket. Insert upper (longer)
mounting hardware through alternator mount. Thread
longer capscrew into alternator front mount. DO NOT
tighten completely at this time.
2. Align lower alternator mount hole with lower mounting
bracket on engine and insert lower mounting capscrew.
Tighten lower capscrew and upper capscrew securely.
3. Place a drive ratchet into square hole on serpentine belt
tensioner bracket. Apply pressure against tensioner
bracket and route serpentine belt onto alternator and
engine pulleys. Release and check tensioner pulley to
verify that it is pivoting freely in order to provide the
proper tension on belt. Check for proper belt alignment.
(Refer to appropriate Operation & Safety Manual.)
4. Connect previously labeled wire leads to alternator.
5. Properly connect battery.
6. Close and secure engine cover.
7. Remove Do Not Operate Tag from ignition key switch
and steering wheel.
M 8050 Z
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