Section IV. TROUBLESHOOTING
55.
Use of Troubleshooting Section
This section provides information useful in diagnosing and correcting unsatisfactory operation or failure of the road
roller or any of its components. Each trouble symptom stated is followed by a list of probable causes of the trouble. The
possible remedy recommended is described opposite the probable cause.
Note. All reference in this section to paragraphs in chapter 4 pertain to operations that are the responsibility
of the field and depot maintenance personnel. Organizational maintenance personnel should not proceed
without proper authority.
56.
Starting Motor Fails to Operate
Probable cause
Possible remedy
Magnetic switch defective.
Replace magnetic switch (par. 115).
Starting motor defective.
Replace starting motor (par. 114).
Battery discharged.
Check and charge the battery (par. 111).
Inspect and tighten battery cables (par. 111h).
Replace the starter button (par. 120e).
Battery cables loose or disconnected.
Starter button defective.
57.
Starting Motor Operates Slowly
Probable cause
Possible remedy
Battery discharged.
Check and charge the battery (par. 111).
Inspect and tighten battery cables (par. 111h).
Battery cables loose or disconnected.
Oil in the crankcase cold and thick.
Move the roller to a warm location and allow oil to warm
up. Fill the crankcase with oil as specified in LO 5
1185.
58. Engine Fails to Start
Probable cause
Possible remedy
Ignition key turned off.
Turn the ignition key to ON position.
Magneto switch not pulled out.
Pull out the magneto switch.
Lack of fuel.
Fill the fuel tank.
Overchoking.
Allow the engine to stand a few minutes. Open throttle
beyond the normal starting position and turn the
engine over until it starts. Set the throttle back to
normal idling position.
Dirt or grime in fuel lines.
Clean lines and fuel filter (pars. 103, 104).
Fuel line pinched or punctured.
Inspect, repair, or replace (par. 104).
Adjust carburetor (par. 106d).
Carburetor out of adjustment.
Spark plugs dirty or damaged.
Remove, inspect, clean, adjust, and replace (par. 117).
58
