NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 1-19
CHAPTER 2 MAINTENANCE
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.
1.5.5 Inspect Wiring, Battery, and Cables
1. Inspect all wiring and cable harnesses for loose connections, evidence of
shorting (burned insulation or terminals) and frayed wires.
2. Check that retaining clips are secure.
3. Remove exterior dirt and grease by wiping with a cloth dampened with a
general-purpose cleaner.
4. Allow parts to air dry after cleaning.
5. Remove cables from battery posts.
6. Inspect battery for evidence of electrolyte loss. Inspect case for cracks
and leaks.
7. Check that posts are secure. If loose, replace battery. (Send battery to
overhaul personnel for salvage.)
8. If corrosion or dirt is present, clean top of battery with a solution of clean
careful not to scatter corrosion residue. Wipe clean with a cloth moistened
with baking soda in water.
1 SERVICING
AUGUST 31, 2008
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