maintenance — TRAILERS
WARNING
Failure to maintain proper fluid level in the actuator may result in loss of braking action which could cause severe property damage, injury or death.
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 adjustment or repairs.
Table 4. Hydraulic Brake Troubleshooting
Symptom | Possible Cause | Solution | |
No Brakes | Brake line broken or kinked? | Repair or replace. | |
| Brake lining glazed? | Reburnish or replace. | |
| Trailer overloaded? | Correct weight. | |
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|
| |
Weak Brakes or | Brake drums scored or | Machine or replace. | |
Brakes Pull to | grooved? | ||
| |||
One Side | Tire pressure correct? | Inflate all tires equally. | |
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| |
| Tires unmatched on the | Match tires. | |
| same axle? | ||
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| ||
| Brake components loose, | Replace components. | |
Locking Brakes | bent or broken? | ||
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| Brake drums | Replace. | |
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|
| |
Noisy Brakes | System lubricated? | Lubricate. | |
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| ||
Brake components correct? | Replace and correct. | ||
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|
|
| |
| Brake lining thickness | Install new shoes and | |
| incorrect or not adjusted | ||
Dragging | linings. | ||
correctly? | |||
Brakes |
| ||
Enough brake fluid or correct | Replace rubber parts | ||
| |||
| fluid? | fill with dot 4 fluid. |
Adjustable Channel
Your trailer may be equipped with an adjustable channel (Figure 15) that allows the coupler to be raised or lowered to a desired height. Periodically check the channel bolts for damage or loosening.
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.
Figure 15. Adjustable Channel
Wheel Bearings
Wheel bearings (Figure 16) 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.
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!
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.
Follow the steps below to disassemble the wheel hub and service the wheel bearings. See Figure 16.
BEARING
WHEEL
HUB
OIL |
|
|
|
SEAL |
| BEARING | COTTER |
| BEARING | CUP | PIN |
| BEARING | ||
| CUP | ||
|
|
| |
|
|
| DUST |
|
| LUG | CAP |
|
| NUT |
|
SPINDLE |
|
WASHER | SPINDLE |
| |
| NUT |
Figure 16. Wheel Hub Components
MLT20 SERIES LIGHT TOWER • operation manual — rev. #0 (01/18/13) — page 25
