4-7
4
Tracking Adjustment (Speed)
Tracking adjustment, or wheel speed, is set individually
for LH and RH sides. If the operator complains the loader
does not go in a straight line when the levers are pushed
clear forward the limiter stops may need adjustment.
1 Raise the boom arms, engage the boom support pins
and shut off the engine. Raise and block the loader
securely off the ground.
2 Remove the seat and hydrostatic shield. Note the
location of the steering control limiter bolts located front
and rear of each steering control lever, just below the
pivot point.. (fig. C2364)
3 Make sure the neutral adjustment are adjusted cor-
rectly. Refer to pages 4- 4 ~ 4-7.
4 If and when all rod bushings and pivot points have
been check for wear or binding, proceed with the wheel
speed adjustment.
5 Start the engine and release the parking brake. Adjust
the engine rpm to the full high idle position. Refer to
Section 7 to verify engine rpm.
6 Using an rpm measuring tool ( fig. C1837 Thomas
P/N 43981) check wheel speed on side in the forward and
reverse direction. Repeat for opposite side. (fig. C2445)
7 Correct wheel speed is set at 69 rpm forward and 60
rpm. reverse for the 85 models.
8 If adjustment is necessary, loosen the jam nut and
turn the limiter bolt in to increase wheel speed or out to
decrease wheel speed.
9 Tighten the jam nut and retest the speed adjustment.
Repeat if necessary. Check Control Rate Limiter
Adjustment, page 4-9.
10 Replace the seat and hydrostatic shield.
Note: If the wheel speed can not be adjusted to meet the
above specification, check the engine rpm. Refer to
Section 7.
If the engine rpm is acceptable, check for hydrostatic
problems such as drive motor seal leakage, etc. Refer to
Section 2 for testing procedures.
WARNING
Raise the loader securely off the ground before
starting the engine.
WARNING
Never work under the boom arms without the boom
supports engaged.
STEERING 4.1
C2364
C1837
C2445
Combination wheel
speed and photo -
sensor tachometer.
Thomas P/N 43981
Not exactly as shown
Speed control limiter bolts
Jam nuts
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