Multi Tech Equipment MLT20DCA6 Wheel Rims, Wheels, Bearings and Lug nuts, Notice

safety guidelines — TRAILERS

Table B below will help pinpoint the causes and solutions of tire wear problems.

Table B. Tire Wear Troubleshooting

Wear pattern		Cause	solution
	Center Wear	Over infl ation.	Adjust pressure to particular
			load per tire manufacturer.
	Edge Wear	Under infl ation.	Adjust pressure to particular
			load per tire manufacturer.
		Loss of camber	Make sure load does not
	Side Wear		exceed axle rating.
		or overloading.
			Align wheels.
	Toe Wear	Incorrect toe-in.	Align wheels.
	Cupping	Out-of-balance.	Check bearing adjustment
			and balance tires.
	Flat Spots	Wheel lockup and	Avoid sudden stops when
		tire skidding.	possible and adjust brakes.

WaRnIng

ALWAYS wear safety glasses when removing or installing force fi tted parts. DO nOT attempt to repair or modify a wheel.

DO NOT install an inner-tube to correct a leak through through the rim. If the rim is cracked, the air pressure in the inner tube may cause

pieces of the rim to explode (break off) with great force and cause serious eye or bodily injury.

Wheel Rims

If the trailer has been struck, or impacted, on or near the wheels, or if the trailer has struck a curb, inspect the rims for damage (i.e. being out of round); and replace any damaged wheel. Inspect the wheels for damage every year, even if no obvious impact has occurred.

Wheels, Bearings and Lug nuts

A loose, worn or damaged wheel bearing is the most common cause of brakes that grab.

To check wheel bearings, jack trailer and check wheels for side-to-side looseness. If the wheels are loose, or spin with a wobble, the bearings must be serviced or replaced. Check infl ation pressure weekly during use to insure the maximum tire life and tread wear. Most trailer axles are built with sealed bearings that are not serviceable. Sealed bearings must be replaced as complete units.

NOTICE

neveR use an pneumatic air gun to tighten wheel lug nuts.

Over-tightening lug nuts will result in breaking the studs or permanently deforming the mounting stud holes in the wheels.

WaRnIng

Lug nuts are prone to loosen after initial installation, which can lead to death or serious injury. Check all wheel lug nuts periodically.

Lug nut Torque Requirements

It is extremely important to apply and maintain proper wheel mounting torque on the trailer. Be sure to use only the fasteners matched to the cone angle of the wheel. Proper procedure for attachment of the wheels is as follows:

1.Start all wheel lug nuts by hand.

2.Torque all lug nuts in sequence. See Figure L. DO NOT torque the wheel lug nuts all the way down. Tighten each lug nut in 3 separate passes as defi ned by Table C.

3.Check to see if the lug nuts are tight after the fi rst 10, 25 and 50 miles of driving and before each tow thereafter

Figure L. Wheel Lug Nuts Tightening Sequence

page 40 — MLT20 sERIES LIGHT TOWER • operation manual — rev. #0 (01/18/13)