JLG 510AJ Service Manual - Manual (Page 110)

SECTION 3 - CHASSIS AND TURNTABLE
3-68 – JLG Lift – 3121181
3.9 GENERATOR
Every 250 hours
Every 250 hours of operation, check the drive belt for proper
tension.
Every 500 hours
Every 500 hours of operation, service the generator brushes
and slip rings. Hostile environments may require more fre-
quent service.
Every 500 hours of service, blow out the inside of the genera-
tor. If operating in a hostile environment, clean monthly.
Overload Protection
STOP ENGINE WHENEVER CHECKING OR INSPECTING THE CIRCUIT BREAKER.
The circuit breaker protects the generator windings from over-
load. If the circuit breaker opens, generator output stops. If the
circuit breaker continues to open, check for faulty equipment
connected to the platform receptacles.
Inspecting Brushes, Replacing Brushes, and
Cleaning Slip Rings
Refer to Figure 3-54., Inspecting Generator Brushes, Replacing
Brushes, and Cleaning Slip Rings.
INSPECTING BRUSH POSITION
Inspect brush alignment with slip rings. View alignment
through the air vents in the stator barrel. The brushes must
ride completely on the slip rings.
INSPECTING BRUSHES
Remove end panel. Inspect wires. Remove brush holder
assembly. Pull brushes from holders.
Replace brushes if damaged, or if brush is at or near minimum
length.
CLEANING SLIP RINGS
Visually inspect slip rings. Under normal use, rings turn dark
brown.
If slip rings are corroded or their surface is uneven, remove the
belt to turn the shaft by hand for cleaning.
Clean rings with 220 grit emery paper. Remove as little mate-
rial as possible. If rings are deeply pitted and do not clean up,
consult generator factory service.
Reinstall belt, brush holder assembly, and end panel.
1/2 in.
(13 mm)
CIRCUIT
BREAKER