7.7 LXT95 Surge Brakes
IMPORTANT! Repair and maintenance of the brakes should
be performed by a qualified mechanic.
When adjusting or repairing to the brakes, be aware there are a
left- and right-hand brake assemblies.
Trailer brakes must be inspected and serviced immediately if a
loss of performance is indicated. With normal use, servicing at
one-year intervals is usually adequate. With increased usage,
this work should be done more frequently as required.
After replacement of brake shoes and linings, the brakes
must be re-burnished to seat in the new components.
This
should be done by applying the brakes 20 to 30 times from
an initial speed of 40 mph (65 km/h) then slowing to 20 mph
(32 km/h). Allow ample time for brakes to cool between
applications. This procedure allows the brake shoes to seat in to
the drum surface.
Wheel Cylinders
Inspect for leaks and smooth operation. Clean with brake
cleaner and flush with fresh brake fluid. Hone or replace as
necessary.
Brake Lines
Check for cracks, kinks, or blockage. Flush with fresh brake
fluid. Bleed system to remove all air. Replace as necessary.
Shoes and Linings
Replacement is necessary if the lining is worn (less than 1/16"
[1.5 mm]), contaminated with grease or oil, or abnormally
scored or gouged. Hairline heat cracks are normal in bonded
linings and should not be cause for concern.
When replacement is necessary, it is important to replace both
shoes on each brake and both brakes of the same axle. This
helps retain the braking balance. Before reassembling, apply a
light film of grease or anti-seize compound on the brake anchor
pin, the actuating arm bushing and pin, and the areas on the
backing plate that are in contact with the brake shoes.
Hardware
Check all hardware. Check shoe return spring, hold down
springs and adjuster for stretch or wear. Replace as required.
Brake Adjustment
1.
Raise the trailer and secure on adequate jack stands. Make
sure the wheels and drums can rotate freely.
2.
Locate and remove the adjusting hole cover from the slot
on the brake backing plate.
3.
With a screwdriver or standard adjusting tool, rotate the
star wheel of the adjuster assembly to expand the brake
shoes. Adjust the brake shoes out until the pressure of the
linings against the drum makes the wheel very difficult to
turn.
4.
Then rotate the star wheel in the opposite direction until the
wheel turns freely with a slight lining drag.
5.
Replace the adjusting hole cover and lower the wheel to the
ground.
6.
Repeat the above procedure on all brakes. For best results,
the brakes should all be set at the same clearance.
Most of the brake components are very similar to those used in
electric brakes, and maintenance is comparable for the hub and
drum, shoes and linings, and bearings.
LXT95 / LXT115
Log Trailer & Grapple
Service and Maintenance
55
Summary of Contents for LXT115
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