NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 4-6
CHAPTER 2 MAINTENANCE
4 REPAIRS
JUNE15, 2015
b. Install wheel and tire assembly on axle. Rear dual wheels are installed
on. . Tighten gradually in
an alternating pattern.
c. The axle hub cover is provided with jack screw holes so when you
remove the cover bolts, you can thread them into these holes and
uniformly torque
d. When reinstalling this cover, it is very important to center the jack
screw holes over the solid parts of the hub. DO NOT position them
over the scallops in the hub. If you do, the next time you use the jack
screw holes to remove the cover, the bolts will ride up on the scallops
and break the hub.
NOTICE!: When using jackscrews to remove cover be sure all the
mounting bolts have been removed or cover breakage will result.
e. When mounting the wheels, position the valve stem hole in line with
the “V” notch on the axle hub. The valve stem extension must pass
through this notch. If you do not, the valve stem will wear through.
f. Position the wheel clamps so the joint is in line with the valve stem
and6 doesn’t cover the passage way for the valve stem extension.
g.
h. If air wrenches are used, they must be periodically calibrated for proper
torque output. Use a torque wrench to check the air wrench output and
adjust the line pressure to give correct torque.
i.
the torque levels is necessary because settling in the joint causes loss
of clamp load. After initial operation, check monthly or every 250 hours,
Which Wheel Stud Size Tightening Torque (dry)
Front 1/2”-20 See decal on tractor
Rear (Rockwell) 9/16”-18 See decal on tractor
Rear (Newage) M20 x 1.5 See decal on tractor
j. Maintain nut torque shown in table through planned, periodic checks at
250 hour intervals.
4. Remove jack stand and jack from beneath tractor.
5. Run unit and check wheels after one hour and periodically thereafter to be
sure wheels are set.
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