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DCA125SSIU 50 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (12/22/08) — PAGE 43
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.
Tire Wear/Infl ation
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 infl ation
pressure weekly during use to insure the maximum tire life
and tread wear.
Table 14 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
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 TroubleshootingTable 14.
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.
Side Wear
Loss of camber
or overloading.
Make sure load does not
exceed axle rating.
Align wheels.
Toe Wear Incorrect toe-in. Align wheels.
Cupping Out-of-balance.
Check bearing adjustment
and balance tires.
Flat Spots
Wheel lockup and
tire skidding.
Avoid sudden stops when
possible and adjust brakes.
Suspension
The leaf suspension springs and associated components
(Figure 59) 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 15.
Major Suspension ComponentsFigure 59.
Suspension Torque RequirementsTable 15.
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
Spring Eye Bolt
Snug fi t only. Parts must rotate freely.
Locking nuts or cotter pins are
provided to retain nut-bolt assembly.
Shoulder Type
Shackle Bolt
Min-30 Max-50