1 GENERAL REPAIR
Perform lockout/tagout procedures before adjusting, lubricating, cleaning or
otherwise servicing. Failure to do so could result in unexpected startup and could cause serious
injury or death.
To minimize risk of brake system failure and possible accident, when servicing
brakes or brake system:
• Do not over tighten brake tube fittings. Over tightening may crack the fitting or damage the
seat in the cylinder fitting.
• Compressed air used to service brake components must be oil-free or rubber parts may be
damaged.
• Always replace brake lines that are questionable.
• Never allow brake system rubber parts to come in contact with gasoline, diesel fuel, or any
type of cleaner other than an approved brake cleaner. Wash hands before handling brake
components.
• Brake linings that contact oil or grease can become contaminated, lose braking friction and
then must be discarded.
1.1 GUIDELINES FOR REPAIRING THE TRACTOR
The following are general instructions for the removal, disassembly, cleaning, inspection,
reassembly, and installation of tractor components within the capabilities of the using
organization. Common shop practices are not described. Use the exploded views in parts
manual, chapter 4 for reference.
1.1.1 Special Tools
There are no special tools required for this tractor. Common automotive shop tools are all
that is required to service the tractor.
1.1.2 Removal and Disassembly
Special instructions are noted in the appropriate text. Disassemble components only to the
extent necessary to do repairs.
1.1.3 Cleaning
When cleaning, keep related parts together so reassembly is easier. Valves, pistons,
sleeves and other internal parts that have close tolerance fits in mating bores should be
cleaned individually to prevent surface scoring and marking. Special cleaning instructions
are given where required.
CHAPTER 3 OVERHAUL AUGUST 31, 2008
1 GENERAL REPAIR PAGE 1
M140 Tow Tractor Manual No. 46054
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