SECTION 8 –
MAINTENANCE AND STORAGE
8-28
2. Using an “X” pattern (as shown in the fol-
lowing photo), verify that the current
torque on each tread adjust bearing bolt
is equivalent to the last inspection from
100 hours of previous operation.
3. Repeat pattern 3 to 4 times until the last
sequence shows no movement of the
bolts to achieve desired torque.
4. Tighten jam nut.
Typically, a torque value of 20 to 25 ft.-lbs.
is required to stabilize the axle and still allow
tread width adjustment.
NOTE: Never operate machine with loose or
missing tread plates. To visually
inspect for loose tread plates, slowly
rock the machine forward and
backwards while observing the legs
for movement. If plates become
loose, the leg will rock as the
machine starts to move.
EVEN PRESSURE OF THE TREAD
ADJUST BEARING PLATES IS REQUIRED
FOR PROPER OPERATION.
•
Figure A
- shows correct position of the
tread adjust bearing plates and bolts, as
well as the outer leg.
•
Figure B
- shows the plates when there
is not even torque on each of the tread
adjust bearing bolts.
•
Figure C
- shows a situation in which
there is not enough torque on the tread
adjust bearing bolts.
NOTE: Both Figures B and C will cause the
tread adjust to operate incorrectly, or
not at all.
SERVICE - TOE-IN
Step 1 - Phase Steering
Cylinders
The steering cylinders must be phased
before any mechanical adjustments can be
made (cylinder stroke = 8.8”/22.4 cm). When
the cylinders are re-phased, each cylinder
Jam Nut
(Located on each tread adjust bearing bolt)
-Typical View
“X” Pattern
-Typical View
NOTICE
If hydraulic tread adjust will never be
used or if your machine is not equipped
with tread adjust, set all bolt torque
settings to 50 ft.-lbs. using the following
procedure.
A
B
C
Summary of Contents for STS 10
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