TM 5-4310-270-14
Table 4-2. Troubleshooting (cont)
Malfunction
Test or Inspection
Corrective Action
(5) Install front throttle housing gasket and front throttle housing.
NOTE
Eliminate surging or poor speed regulation by adjusting the main adjustment needle on the carburetor.
b. See figure 4-14 for adjustment on model 1A08-3.
(1) Remove the front throttle housing cover and gasket.
(2) Open clevis and disconnect from the throttle level.
(3) Hold the throttle 1/16 inch from the open position.
(4) Loosen the locknut below the clevis and screw the clevis up or down until the clevis pin
aligns with the hole in the throttle lever.
(5) Connect the clevis to the throttle lever and tighten locknut.
(6) Install the gasket and front throttle housing cover.
(7) To regulate engine speed, turn nut on control rod assembly clockwise to increase or
counterclockwise to decrease engine speed.
NOTE
Eliminate surging or poor speed regulation by adjusting the idle adjustment needle on carburetor.
2. EXCESSIVE OIL CONSUMPTION.
Step 1. Check for wrong type of inferior grade of oil.
In order to be certain of proper oil, drain crankcase and refill with proper type and amount.
Step 2. Check for loose oil line or fitting.
Tighten oil line or fitting.
Look for oil leakage around oil line or fittings. If leakage is present tighten oil line fittings.
3. NOISY OPERATION.
Step 1. Check for loose external parts.
Examine compressor carefully, tightening any loose bolts, screws, nuts, or other threaded parts that
might be generating noise.
Step 2. Check for pulley striking coils.
a. Bend the coils toward base so they clean pulley.
b. If pulley still strikes coils proceed as follows.
(1) Refer to figure 4-15 for removal of belt guard.
(2) Loosen nuts attaching guard to handtruck frame.
(3) Loosen screw attaching guard to compressor. Remove guard.
(4) Loosen nut on hub of pulley and slide pulley outward on crankshaft until it clears coils.
Tighten nut.
(5) Install guard by attaching screw to compressor and nuts to handtruck frame.
Step 3. Check for insufficient oil.
Check oil with oil level gage.
4. EXCESSIVE VIBRATION.
Step 1. Check for loose compressor or engine mounts.
Tighten all the bolts holding the engine and compressor to the truck frame.
4-28
