Multiquip MLT25 operation manual Adjustable Channel, Hydraulic Brake Troubleshooting

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.
Weak Brakes or	Brake drums scored or	Machine or replace.
Brakes Pull to	grooved?
One Side	Tire pressure correct?	Inflate all tires equally.
	Tires unmatched on the	Match tires.
	same axle?
	Brake components loose,	Replace components.
Locking Brakes	bent or broken?
	Brake drums out-of-round?	Replace.
Noisy Brakes	System lubricated?	Lubricate.
	Brake components correct?	Replace and correct.
	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 16) 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 16. Adjustable Channel

Wheel Bearings

Wheel bearings (Figure 17) 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 17.

BEARING

WHEEL

HUB

OIL
SEAL		BEARING	COTTER
	BEARING	CUP	PIN
		BEARING
	CUP
			DUST
		LUG	CAP
		NUT

SPINDLE
WASHER	SPINDLE
	NUT

Figure 17. Wheel Hub Components

MLT25 SERIES LIGHT TOWER • operation manual — rev. #0 (11/28/12) — page 25