3-12. TIRE AND WHEEL ASSEMBLY SERVICING (MODELS WPES-10 AND
This task consists of
Lugnut wrench and handle (from towing vehicle)
General Safety Instructions:
ROWPU shutdown (para 2-14)
Trailer on flat and solid ground
Trailer prepared for use (figure 2-19)
Lifting heavy equipment can cause serious injury.
Replacement of one tire and wheel assembly is shown. Replacement of tire and wheel on
opposite end of axle is similar.
Remove tire and wheel from hub (Refer to figure 3-14)
To avoid injury to personnel, tire removal should ONLY be done on solid ground
(concrete, asphalt, hard ground or similar hard surfaces).
To prevent the trailer from rolling or sliding, use blocks under the tires.
If front (trailer hitch end) tire and wheel (1) will be removed, block both rear (generator
end) tires (2).
If rear (generator end) tire and wheel (2) will be removed, block both front (trailer hitch end) tires
To prevent injury to personnel and damage to the equipment, do not remove lug nuts
before tire and wheel are off ground.
Lugnuts on left side of trailer (roadside) have left hand threads. Lugnuts on right side of
trailer (curbside) have right hand threads. Lugnuts and studs are marked to aid
Using lugnut wrench and handle, loosen lugnuts (3 through 8) one turn only.
Leveling jacks should be lowered at the same time and at the same speed.
If front tire and wheel (1) will be removed, lower both front leveling jacks (9) until front tires are
off ground (figure 2-18).