Multiquip AP6 Series - Manual (Page 59)

AP6/AP8 SERIES TRASH PUMPS • OPERATION AND PARTS MANUAL — REV. #0 (06/11/14) — PAGE 59
MAINTENANCE (TRAILER)
TOW VEHICLE OPERATED ELECTRIC BRAKES
The electric brakes that operate in conjunction with the
tow vehicle brakes must be “synchronized” so that braking
is properly distributed to the tow vehicle brakes and the
trailer brakes.
For proper operation and synchronization, read and follow
the axle/brake and the brake controller manufacturers’
instructions. To make certain an electrically-operated
braking system will function properly, you must have your
dealer inspect the magnets at least once a year, or each
12,000 miles. See the brake manual for wear and current
inspection instructions.
If brakes are not working correctly reference Table 19.
Table 19. Electric Brake Troubleshooting
Symptom Possible Cause Solution
No Brakes or Intermittent
Brakes
Open circuits or broken
wires?
Find and correct.
Short circuits? Find and correct.
Faulty controller? Find and correct.
Loose connections? Find and correct.
Ground wire secure? Find and correct.
Weak Brakes or Brakes
Pull to One Side
Grease or oil on magnets
or linings?
Clean or replace.
Connections corroded?
Clean and correct
cause of corrosion.
Brake drums scored or
grooved?
Machine or replace.
Brakes synchronized? Correct.
Locking Brakes
Brake components loose,
bent or broken?
Replace
Components.
Brake drums out-of-
round?
Replace.
Noisy Brakes
System lubricated? Lubricate.
Brake components
correct?
Replace and
correct.
Dragging Brakes
Brake lining thickness
incorrect or not adjusted
correctly?
Install new shoes
and lining.
Wheel bearings adjusted
correctly?
Adjust.
ADJUSTABLE CHANNEL
Your trailer may be equipped with an adjustable channel
(Figure 56) that allows the coupler to be raised or lowered
to a desired height. Periodically check the channel bolts
for damage or loosening.
Figure 56. Adjustable Channel
Wheel Bearings
Wheel bearings (Figure 57) must be inspected and
lubricated once a year or 12,000 miles to insure safe
operation of your trailer.
If trailer wheel bearings are immersed in water, they must
be replaced.
NOTICE
When replacing channel mounting hardware (nuts,
bolts and washers), NEVER substitute substandard
hardware. Pay close attention to bolt length and grade.
ALWAYS use manufacturer's recommended parts
when replacing channel mounting hardware.
2" or 2-5/16" BALL
COUPLER
ADJUSTABLE
CHANNEL
5/8" FLAT
WASHER
5/8" X 11" X 5"
BOLT
5/8"
NYLOC
NUT
ADJUSTABLE
CHANNEL
5/8" FLAT
WASHER
5/8"
NYLOC
NUT
5/8" X 11" X 5"
BOLT
3" PINTLE EYE
RING
DANGER
If trailer wheels are under water for a long period of
time, wheel bearings may fail. If this is the case, service
wheel bearings immediately.
The possibility exists of the wheels falling off causing
equipment damage and severe bodily harm even death!