Brake Adjustment - MULTIQUIP Power WhisperWatt DCA45SSIU4 Operations & Parts Manual

BRAKES
Trailer brakes should be inspected the first 200 miles of
operation. This will allow the brake shoes and drums to seat
properly. After the first 200 mile interval, inspect the brakes
every 3,000 miles. If driving over rough terrain, inspect the
brakes more frequently.
Figure 58 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
difficult 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
DCa45SSIU4 60 hz generator • operatIon anD partS manUal — rev. #1 (10/24/13) — page 41
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 fluid or correct fluid?
traiLer Maintenance
Hydraulic Surge Brakes
Hydraulic surge brakes (Figure 58) 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 58. 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.
Inflate all tires equally.
Match tires.
Replace components.
Replace.
Lubricate.
Replace and correct.
Install new shoes and
linings.
Replace rubber parts
fill with dot 4 fluid.