TM 5-4310-335-14
Table 4-2. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
All ducts, covers, and deflectors must be installed during engine operation.
Step 2. Check oil level in engine.
Add oil to engine if needed.
5. ENGINE SURGES OR OVERSPEEDS
Governor adjustment is as follows:
a. Remove the front throttle housing cover and gasket.
b. Open clevis and disconnect it from the throttle lever.
e. Hold the throttle 1/16 inch from the open position.
d. 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.
e. Connect the clevis to the throttle lever and tighten locknut.
f.
Install the gasket and front throttle housing cover.
g. To regulate engine peed, turn nut on control rod assembly clockwise t o increase, or
counterclockwise to decrease engine speed.
NOTE
Eliminate surging or poor speed regulation by adjusting the main adjustment
needle on the carburetor.
6. INSUFFICIENT AIR FLOW OR LONG PUMP UP TIME
Step 1. Check the engine for proper governed speed.
Adjust the engine governor.
a. Remove two screws and remove the front throttle housing cover and gasket.
b. Loosen setscrew and release the governor control rod. Push the throttle lever down
as far as possible, hold the governor control rod in downward position and move the
throttle lever up about 1/16 inch.
c. Tighten the setscrew and inspect the linkage for free play by manually operating the
carburetor throttle shaft.
d. To regulate the speed of the engine, turn nut on control rod assembly clockwise to
increase or counterclockwise to decrease engine speed.
e. Install the front throttle housing cover and gasket and secure with two screws.
Step 2. Check for air leaks.
Tighten all connections and/or replace defective parts.
Step 3. Check for insufficient inlet air to the compressor.
Replace the inlet air filter.
a. Remove four screws and washers that secure the cup and protective cap.
b. Remove the protective cap, cap, packing and the inlet air filter.
Step 4.
Check for an
overheating compressor covered by
bent intercooler fins or
other obstructions. Straighten
the intercooler fins. Remove any obstructions from the cooling area.
7.
EXCESSIVE OIL CONSUMPTION
Check for oil leaks as leaking oil seal, gasket or tubing.
Replace defective seal or gasket. Tighten or replace leaking tubing.
Section V. RADIO INTERFERENCE SUPPRESSION
4-9. Definitions
a. Interference. The term "interference" as used herein applies to electrical disturbances in
may interfere with the proper operation of radio receivers or other electronic equipment, or
enable the enemy to locate the equipment.
b. Interference Suppression. The term "interference suppression" as used herein applies to
the methods used to eliminate or effectively reduce radio interference generated by the
compressor assembly.
4-10.General Methods Used to Attain Proper Suppression
Essentially, suppression is attained by providing a low resistance path to ground stray current. Methods used
include shielding the ignition and high-frequency wires, grounding the frames with bonding straps, and using
capacitors and resistors.
4-7