PAGE 48 — DIS185SSI4F AIR COMPRESSOR • OPERATION MANUAL — REV. #0 (12/19/16)
TRAILER MAINTENANCE
TRAILER MAINTENANCE
The following trailer maintenance guidelines are intended
to assist the operator with preventive maintenance.
Adjustable Channel
Your trailer may be equipped with an adjustable channel
(Figure 69) that allows the coupler to be raised or lowered
to a desired height. Periodically check the channel bolts
for damage or loosening.
Figure 69. Adjustable Channel
Wheel Bearings
Wheel bearings (Figure 70) must be inspected and
lubricated once a year or 12,000 miles to ensure safe
operation of your trailer.
If trailer wheel bearings are immersed in water, they must
be replaced.
NOTICE
When replacing channel mounting hardware (nuts, bolts
and washers),
NEVER
substitute with substandard
hardware. Pay close attention to
bolt length
and
grade
.
ALWAYS
use manufacturer's recommended parts
when replacing channel mounting hardware.
2" or 2-5/16" BALL
COUPLER
ADJUSTABLE
CHANNEL
5/8" FLAT
WASHER
5/8" X 11" X 5"
BOLT
5/8"
NYLOC
NUT
ADJUSTABLE
CHANNEL
5/8" FLAT
WASHER
5/8"
NYLOC
NUT
5/8" X 11" X 5"
BOLT
3" PINTLE EYE
RING
DANGER
If trailer wheels are under water for an extended period
of time, wheel bearings may fail. If this is the case,
service wheel bearings immediately.
The possibility exists of the wheels falling off, causing
equipment damage and severe bodily harm or even
death!
If the trailer is not being used for an extended period of time,
have the bearings inspected and packed more frequently
(at least every six months and prior to use).
Follow the steps below to disassemble the wheel hub and
service the wheel bearings. See Figure 70.
Figure 70. Wheel Hub Components
After removing the dust cap, cotter pin, spindle nut and
spindle washer, remove the hub to inspect the bearings
for wear and damage.
Replace bearings that have flat spots on rollers, broken
roller cages, rust or pitting. Always replace bearings
and cups in sets. The inner and outer bearings are to
be replaced at the same time.
Replace seals that have nicks, tears or wear.
Lubricate the bearings with a high quality EP-2
automotive wheel bearing grease.
WHEEL HUB ADJUSTMENT
Every time the wheel hub is removed and the bearings are
reassembled, follow the steps below to check the wheel
bearings for free running and adjust.
Turn the hub slowly, by hand, while tightening the spindle
nut until you can no longer turn the hub by hand.
Loosen the spindle nut until you are just able to turn it
(the spindle nut) by hand. Do not turn the hub while the
spindle nut is loose.
Install a new cotter pin through the spindle nut and axle.
Check the adjustments. Both the hub and the spindle nut
should be able to move freely (the spindle nut motion
will be limited by the cotter pin).
WHEEL
HUB
BEARING
CUP
BEARING
CUP
BEARING
BEARING
OIL
SEAL
SPINDLE
NUT
SPINDLE
WASHER
COTTER
PIN
DUST
CAP
LUG
NUT