Multiquip DCA400SSI Tires/Wheels/Lug Nuts, Tire Wear/Inflation, Suspension, Trailer Maintenance

TRAILER MAINTENANCE

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.

CAUTION

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

CAUTION

DO NOT attempt to repair or modify a wheel. DO NOT install in inner tube to correct a leak 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.

Tire Wear/Inflation

Tire infl ation 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.

Table 16 (Tire Wear Troubleshooting) will help pinpoint the causes and solutions of tire wear problems.

Table 16. 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.

Suspension

The leaf suspension springs and associated components (Figure 61) should be visually inspected every 6,000 miles for signs of excessive wear, elongation of bolt holes, and loosening of fasteners. Replace all damaged parts (suspension) immediately.Torqued suspension components as detailed in Table 17.

Figure 61. Major Suspension Components

Table 17. Suspension Torque Requirements

Item	Torque (Ft.-Lbs.)
3/8" U-Bolt	Min-30	Max-35
7/16" U-Bolt	Min-45	Max-60
1/2" U-Bolt	Min-45	Max-60
Shackle Bolt	Snug fi t only. Parts must rotate freely.
	Locking nuts or cotter pins are
Spring Eye Bolt
	provided to retain nut-bolt assembly.
Shoulder Type	Min-30	Max-50
Shackle Bolt

PAGE 44 — DCA400SSI GENERATOR • OPERATION AND PARTS MANUAL — REV. #2 (11/03/08)