Actuator Maintenance; Coupler Maintenance - JLG T500J Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Actuator Maintenance

1. Frequently check brake fluid level (fluid must be DOT3
or 4 approved, clean and uncontaminated).
2. Make sure mounting bolts are properly tightened 15 to
20 ft lbs (20 to 27 Nm) without deformation of coupler.
3. Inspect entire actuator, replace any bent, worn or dam-
aged parts immediately.
4. Be constantly aware of systems braking quality, make
periodic checks as described in the brakes owners man-
ual. Consult certified brake specialist to make necessary
adjustments or repairs. Failure to do so could result in
loss of braking.
5. Be sure hydraulic lines and fittings are tight to avoid
fluid leaks.

Coupler Maintenance

1. Maintain a film of automotive grease in the ball pocket,
ball clamp (front & back), ball clamp spring, where link
pin enters housing, and where the housing contacts the
bracket hardware.
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2. Maintain a film of oil on the pivot points and safety latch
spring using SAE 30W motor oil.
3. Keep the ball pocket and mechanism clean because dirt,
paint, etc. can hinder proper operation. When parking or
storing your trailer, keep the bracket and coupler off the
ground so dirt and/or other foreign material will not
build up in the coupler ball pocket.
4. Grease pivot hinge with automotive grease.
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