JLG T500J, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-24 3121200
Backing Up
1. Follow steps 1 thru 13 under Towing.
2. Before backing up a slope or through soft ground, pull
the trailer forward slightly to assure the actuator socket
is in the fully forward position.
3. Move the lever knob on the side of the actuator down-
ward from the towing position (A) along the curved slot
in the actuator frame to the back-up position (B). The
slot has a notch at the bottom of its’ travel. Plush the
lever knob down to engage the locking notch.
4. Back the trailer up.
AVOID SHARP TURNS. THIS COULD BEND, CREATE EXTREME STRESS, OR FRAC-
TURE EITHER THE ACTUATOR OR TRAILER TONGUE.
5. If the machine is to be uncoupled from the tow vehicle
after backing with the lever knob engaged, block all
wheels and pull forward slightly to take strain off of the
actuator. Uncouple the actuator by lifting the release
handle and raising the trailer tongue. Make sure the
lever knob is in the towing position (A) when uncou-
pling from the trailer.
Maintenance
1. Keep all links and pivots lubricated to prevent rusting
and ensure ease of operation. Use SAE 30 oil, lubricate
inside release handle and inside actuator body from the
underside of the actuator.
NOTE: Lubricate the hitch ball with conventional automotive
grease or a lubricant made for hitch balls.
2. Check for leaks in the brake system. Periodic checks
should be made on all hoses and fittings to guard
against cuts and worn hoses which may cause failure
(leaks, rupturing under pressure, and collapsing).
Replace defective hoses.
3. Check brake fluid level in the master cylinder reservoir.
Keep filled to within 1/2" (13 mm) from the top of the
reservoir. Use only a DOT type 3 or 4 brake fluid.
4. Flush the system yearly or when system is known to be
contaminated.
NOTE: Wheel bearings and seals should be inspected and packed
at this time.
Extended Storage Instructions
Preventative maintenance is recommended for extended peri-
ods of storage.
1. Check brake system for proper fluid level in master cylin-
der, bleed all lines.
2. Lubricate all links and pivots to prevent any rusting.
3. Remove wheel and drum assemblies and spray a good
anti-corrosion compound under rubber boot on for-
ward end of brake wheel cylinder. Avoid spraying drum
and lining.
4. Grease all bearings and reinstall wheel and drum assem-
blies.
5. Make sure breakaway cable is fully released.
6. After extended storage, refer to Maintenance to insure
trailer readiness for towing.
7. Adjust drum brakes.
Proper Towing Checklist
1. Inspect brake fittings for leaks.
2. Adjust brakes every 2000 miles.
3. Lubricate all mechanical moving parts.
4. Inspect the breakaway cable for any kinks.
5. Verify the correct size ball is used, without chips, dirt, or
hairline cracks.
6. Securely attach safety chains to trailer and tow vehicle.
7. For proper braking, trailer should be level when
attached to tow vehicle to produce a positive tongue
load.
8. DOT 3 or DOT 4 brake fluid should be used in master cyl-
inder and fill it from 1/2 full to 1/2" (13 mm) from top of
cylinder reservoir.