NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M100 Tow Tractor Manual No. 46052
PAGE 23
CHAPTER 2 MAINTENANCE
1 SERVICING
APRIL 15, 2012
3. Inspect wheel cylinders according to Chapter 3. Repair or replace wheel
cylinder as needed according to Chapter 3.
4. Inspect brake drums for scoring, heat checking, pitting, out-of-round
condition, or concave, convex, or condition. Drum must be free of grease,
oil, scoring, cracking, or uneven wear.
5. Replace drum if inside surface is rough or ragged or if depth of scoring
exceeds 0.010" (0.3 mm). If heat cracks are visible or can be felt with a
6. Inspect lining thickness. If less than 1/8 inch, replace shoe and lining
assemblies and turn drums. Refer to Chapter 3.
7. Inspect retracting springs, shoe hold-downs, automatic adjusting device,
and shoe contact pads on backing plate. Backing plate and shoe anchors
must be tight.
8. Inspect rear brake backing plate and replace if damaged. Damage might
include cracks, warping, or loose rivets. Refer to Chapter 3.
Do not allow linings to drag on drum or they will heat up and
lock. The linings will be charred and rendered useless, resulting in brake
failure.
Stoplight Switch
Check switch operation according to 2-2 - 2.5.3.
Power Booster/Master Cylinder
reserve charge retention as described in Chapter 3.
Do not carry brake booster by accumulator, allow brake
contains high pressure gas and can leak under pressure and explode if
heated.
Road Test
After performing the above checks and any necessary repairs, drive the
tractor to test brake action. The tractor should stop quickly and smoothly with
no tendency to dive or pull to one side.
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