MAYCO LS450 CONCRETE PUMP • OPERATION MANUAL — REV. #2 (02/23/21) — PAGE 55
TRAILER MAINTENANCE
Periodically check the actuator mounting fasteners for
damage or loosening. Inspect the actuator for worn or
damaged parts. As you are towing your trailer, be aware
of any changes in braking quality. This could be an early
warning of brake or actuator malfunction and requires
immediate attention. Consult a certified brake specialist
to make necessary adjustments or repairs.
ADJUSTABLE CHANNEL
Your trailer may be equipped with an adjustable channel
(Figure 64) that allows the coupler to be raised or lowered
to a desired height. Periodically check the channel bolts
for damage or loosening.
WARNING
Failure to maintain the proper fluid level in the actuator
may result in loss of braking action which could cause
severe property damage, injury or DEATH.
Table 8. Hydraulic Brake Troubleshooting
Symptom Possible Cause Solution
No brakes Brake line broken or kinked? Repair or replace.
Weak brakes
or brakes pull
to one side
Brake lining glazed? Reburnish or replace.
Trailer overloaded? Correct weight.
Brake drums scored or
grooved?
Machine or replace.
Tire pressure correct? Inflate all tires equally.
Tires unmatched on the
same axle?
Match tires.
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
linings.
Not enough brake fluid or
incorrect fluid?
Replace rubber parts.
Fill with DOT 4 fluid.
NOTICE
When replacing channel mounting hardware (nuts, bolts
and washers), NEVER substitute with substandard
hardware. Pay close attention to bolt length and grade.
ALWAYS use manufacturer’s recommended parts
when replacing channel mounting hardware.
Figure 64. Adjustable Channel
WHEEL BEARINGS
Wheel bearings must be inspected and lubricated once
a year or every 12,000 miles to ensure safe operation of
the trailer.
If trailer wheel bearings are immersed in water, they must
be replaced.
If the trailer has not been used for an extended amount
of time, have the bearings inspected and packed more
frequently—at least every six months and prior to use.
2" or 2-5/16" BALL
COUPLER
CHANNEL
5/8" FLAT
WASHER
5/8" X 11" X 5"
BOLT
5/8"
NYLOC
NUT
ADJUSTABLE
CHANNEL
5/8" FLAT
WASHER
5/8"
NUT
5/8" X 11" X 5"
BOLT
3" PINTLE EYE
RING
DANGER
If the trailer wheels are underwater for a long period
of time, the wheel bearings may fail. If this is the case,
service the wheel bearings immediately.
The possibility exists of the wheels falling off causing
equipment damage and severe bodily harm or even
DEATH!
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