When replacing brake cables it is necessary to
adjust the brake shoes before adjusting the parking
brake system. To adjust the shoes, remove the
rubber hole plug in the brake backing plate and
rotate the star adjusting nut until you cannot rotate
the wheel by hand. Then back off the adjustment ten
to twelve (10--12) notches. Note: always rotate
wheel in direction of forward travel only. Replace
hole plug and proceed to next wheel and repeat
procedure.
Adjust parking brakes after all brake shoes have
been adjusted by:
1. Turning knob on brake lever until lever is
perpendicular to bracket when in “OFF” position.
Wheels should turn freely.
2. With lever in “OFF” position, adjust brake cables
until each has approximately the same tension.
Wheels should turn freely.
3. Move lever to “ON” position. Check each wheel
to see that it will not rotate. If all wheels will rotate,
adjust knob on lever until brakes are fully applied. If
one or two wheels will still rotate, adjust the cables
for those wheels and recheck.
4. After brakes are adjusted, move lever to “ON”
position and apply grease to cable strands from
conduit six inches toward lever. This is to prevent dirt
from getting into the conduit.
NOTE:
New cables will stretch and therefore should
be readjusted after the first week of use.
Every six months, apply a multi--purpose grease to
the fittings on the brake actuator.
Electric Brake Adjustment:
Brakes should be adjusted (1) after the first 200
miles of operation when the brake shoes and drums
have “seated”, (2) at 3000 mile intervals, (3) or as
use and performance requires. The brakes should
be adjusted in the following manner:
1. Jack up trailer and secure on adequate capacity
jack stands. Check that the wheel and drum rotate
freely.
2. Remove the adjusting hole cover from the
adjusting slot on the bottom of the brake backing
plate.
3. With a screwdriver or standard adjusting tool,
rotate the starwheel 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 starwheel 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 above procedures on all brakes.
OIL SEPARATOR ELEMENT
The life of the oil separator element is dependent
upon the operating environment (soot, dust, etc.)
and should be replaced every twelve months or
2000 hours. To replace the element proceed as
follows:
* Ensure the tank pressure is zero.
* Disconnect the hose from the scavenge tube.
* Remove scavenge tube from tank cover.
* Disconnect service line from cover.
* Remove (16) cover mounting screws.
* Remove cover, element and inner shell.
* Remove any gasket material left on cover or tank.
* Install new gasket, inner shell and new element.
* Place a straightedge across top of element and
measure from bottom of straightedge to bottom of
element (See Fig. 4.1).
