Landoll 600A Series, Operator'S Manual, Page: 55 / 86

CAUTION
INSURE SUSPENSION AIR CYLINDERS
ARE INFLATED ON ALL AXLES. FAIL-
URE TO DO SO CAN CAUSE EXCES-
SIVE TIRE WEAR.
b. Should the front and rear axle suspension
air spring (E) not be inflated or feel soft by the
time the undercarriage has reached transport
position, adjust front and rear axle height con-
trol valves as follows:
1. Adjust front axle control valve linkage to
position (pin) control valve arm at center
position of valve when front axle is
approximately 1/2 inch from full down
travel.
2. Adjust rear axle control valve linkage to
position (pin) control valve arm at center
position of valve when rear axle is
approximately 1/2 inch from full up travel.
c. These adjustments may vary with different
tractor fifth wheel heights.
4-7 ALIGNMENT
4-7.1 Wheel Alignment
DANGER
TO PREVENT A LIFE THREATENING
ACCIDENT:
1. SUPPORT TRAILER AND UNDER-
CARRIAGE SO TIRES ARE OFF THE
GROUND.
2. SUPPORT THE TRAILER AND UN-
DERCARRIAGE ON JACK STANDS
WITH SUFFICIENT CAPACITY TO SUP-
PORT THE TOTAL WEIGHT OF THE
TRAILER AND ANY LOAD WHICH IT
MAY BE CARRYING.
When trailer tires show signs of scuffing,
feather-edging or uneven wear, examine the trailer
for damaged suspension (frame, shocks, linkage,
etc.), axle, wheel bearings and wheels. Proper
wheel alignment and wheel bearing adjustment is
essential for proper tire wear. The simplest form of
checking wheel alignment “toe” is by running the
trailer over a “SCUFF GAUGE”. A scuff gauge
reading of 16 feet or less per mile is considered
satisfactory. If a scuff gauge is not readily avail-
able, or edge wear on one side of a tire is occur-
ring signifying positive or negative camber, align-
ment can be checked as follows:
a. Remove wheel, hub and bearing assem-
blies.
4-15
Figure 4-8 Checking Axle for Bend