TM 5-3825-213-20
CHAPTER 5
SNOWPLOW AND CARRIER ENGINES MAINTENANCE INSTRUCTIONS
Section I. PLOW AND CARRIER ENGINES IGNITION SYSTEM
b. Cleaning and Inspection. Clean and inspect
90. General
The plow and carrier engines ignition system
terminals. Replace defective parts as necessary.
consists of a starter, starter solenoid relay, distributor,
c. Installation. Install the starter solenoid relay
spark plugs, and wiring. The source of power to the
assembly as illustrated in figure 40.
ignition system derives from the carrier engine batteries.
The identical engines for the snowplow and carrier are
Waukesha Roiline V-8 engines, model TH-884,
93. Plow and Carrier Engine Spark Plug Wiring
overhead valve, liquid-cooled.
The temperature
a. Removal. Remove the spark plug wiring as
conditions under which the snow removal unit is normally
illustrated in figure 42.
operated make it imperative that the engines be
b. Cleaning and Inspection. Clean and inspect
maintained in good operating condition.
the spark plug wiring for frayed insulation or damaged
threads and replace as necessary.
c. Installation. Install the spark plug wiring as
91. Plow and Carrier Engine Starter Assembly
a. Removal.
illustrated in figure 42.
(1) Remove the coolant circulating pump
94. Plow and Carrier Engine Spark Plug
(2) Remove the starter assembly as
a. Removal. Remove spark plug wiring and
illustrated in figure 40.
spark plugs as illustrated in figure 42.
b. Brush Replacement. Replace the starter
b. Cleaning and Inspection. Clean and inspect
brushes as illustrated in figure 41.
the spark plugs for burned electrode, cracked porcelain,
c. Cleaning and Inspection. Clean and inspect
and damaged threads.
Replace spark plugs as
the starter for defective brushes, free rotation, and
necessary.
condition. Replace defective parts as necessary.
c. Testing. Place spark plug in the testing unit
d. Installation.
with 125 to 150 psi air pressure. When the spark plug
(1) Install the starter assembly as
shows a spark breakdown with less than 125 psi air
illustrated in figure 40.
pressure replace the plugs. Test remaining plugs in a
(2) Install the coolant circulating pump
similar manner.
d. Installation. Install spark plugs and wiring
as illustrated in figure 42.
92. Plow and Carrier Engine Starter Solenoid
Relay Assembly
a. Removal. Remove the starter solenoid
relay assembly as illustrated in figure 40.
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