MULTIQUIP Whisperwatt DCA25SSIU3 Operation And Parts Manual page 39

BRAKES
Trailer brakes should be inspected the fi rst 200 miles of
operation. This will allow the brake shoes and drums to seat
properly. After the fi rst 200 mile interval, inspect the brakes
every 3,000 miles. If driving over rough terrain, inspect the
brakes more frequently.
Figure 56 displays the major hydraulic surge brake
components that will require inspection and maintenance.
Please inspect these components as required using steps
1 through 8 and Table 15 as listed below:
Brake Adjustment
1. Place the trailer on jack stands. Make sure the jack
stands are placed on secure level ground.
2. Check the wheel and drum for free rotation.
3. Remove the adjusting hole cover from the adjusting
slot at the bottom brake backing plate.
4. With a screwdriver or standard adjusting tool, rotate
the star wheel of the adjuster assembly to expand the
brake shoes.
5. Adjust the brake shoes outward until the pressure of
the lining against the wheel drum makes the wheel
diffi cult to turn.
6. Adjust, rotate the star wheel in the opposite direction
until the wheel rotates freely with slight lining drag.
7. Replace the adjusting hole cover and lower the trailer
to the ground.
8. Repeat steps 1 through 7 on the remaining brakes.
Weak Brakes or Brakes Pull to
DCA25SSIU3 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (12/20/10) — PAGE 39
Table 15. Hydraulic Brake Troubleshooting
Symptom
No Brakes Brake line broken or kinked?
Brake drums scored or grooved?
One Side
Tires unmatched on the same axle?
Brake components loose, bent or
Locking Brakes
Brake drums out-of-round?
Noisy Brakes
Brake components correct?
Brake lining thickness incorrect or
Dragging Brakes
Enough brake fl uid or correct fl uid?
TRAILER MAINTENANCE
Hydraulic Surge Brakes
Hydraulic surge brakes (Figure 56) should not require any
special attention with the exception of routine maintenance
such as shoe and lining replacement. Brake lines should
be periodically checked for cracks, kinks, or blockage.
Figure 56. Hydraulic Brake Components
Actuator
Hydraulic surge braking requires the installation of an
actuator at the tongue of the trailer. Remember the surge
or push of the trailer toward the tow vehicle automatically
synchronizes the trailer brakes with the tow vehicle brakes.
As the trailer pushes against the tow vehicle the actuator
telescopes together and applies force to the master
cylinder, supplying hydraulic pressure to the trailer brakes.
Periodically check and test the surge "actuator" to make sure
that it is functioning correctly. Never use an undersize actuator.
Possible Cause
Brake lining glazed?
Trailer overloaded?
Tire pressure correct?
broken?
System lubricated?
not adjusted correctly?
Solution
Repair or replace.
Reburnish or replace.
Correct weight.
Machine or replace.
Infl ate all tires equally.
Match tires.
Replace components.
Replace.
Lubricate.
Replace and correct.
Install new shoes and
linings.
Replace rubber parts
fi ll with dot 4 fl uid.