Multiquip WM120PH manual TIRES/WHEELS/LUG Nuts, Tireswear/Inflation, LUG NUT Torque Requirements

MAINTENANCE (MIXER)

TIRES/WHEELS/LUG NUTS

Tires and wheels are a very important and critical components of the trailer. When specifying or replacing the trailer wheels it is important the wheels, tires, and axle are properly matched.

WARNING — Damaged Wheels

DO NOT attempt to repair or modify a wheel. DO NOT install an inter-tube to correct a leak through the rim. If the rim is cracked, the air pressure in the inter-tube may cause pieces of the

rim to explode (break-off) with great force and can cause serious eye or bodily injury.

TIRESWEAR/INFLATION

Tire inflation pressure is the most important factor in tire life. Pressure should be checked cold before operation. DO NOT bleed air from tires when they are hot. Check inflation pressure weekly during use to insure the maximum tire life and tread wear.

WARNING — Eyesight Hazard

ALWAYS wear safety glasses when removing or installing force fitted parts. Failure to comply may result in serious injury.

Table 9 (Tire Wear Troubleshooting) will help pinpoint the causes and solutions of tire wear problems.

TABLE 9.TIRE WEARTROUBLESHOOTING

LUG NUT TORQUE REQUIREMENTS

It is extremely important to apply and maintain proper wheel mounting torque. 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 39. DO NOT torque the wheel lug nuts all the way down.Tighten each lug nut in 3 separate passes as defined by Table 10.

TABLE 10. TIRE TORQUE REQUIREMENTS

Wheel Size	First Pass	Second Pass	Third Pass
	FT-LBS	FT-LBS	FT-LBS
12"	20-25	35-40	50-65
13"	20-25	35-40	50-65
14"	20-25	50-60	90-120
15"	20-25	50-60	90-120
16"	20-25	50-60	90-120

NEVER! use an pneumatic air gun to tighten wheel lug nuts.

WEAR PATTERN

Center Wear

Edge Wear

Side Wear

Toe Wear

Cupping

Flat Spots

CAUSE

Over Inflation

Under Inflation

Loss of chamber or overloading.

Incorrect toe-in

Out-of balance

Wheel lockup & tire skidding.

SOLUTION

Adjust pressure to particular load per tire manufacturer.

Adjust pressure to particular load per tire manufacturer.

Make sure load does not exceed axle rating. Align wheels.

Align wheels.

Check bearing adjust- ment and balance tires.

Avoid sudden stops when possible and adjust brakes.

WM120PH/SH HYDRAULIC MIXER • OPERATION AND PARTS MANUAL — REV. #7 (09/15/11) — PAGE 31