TM 5-4310-276-14
Table 4-2. Troubleshooting (cont)
Malfunction
Test or Inspection
Corrective Action
PNEUMATIC SYSTEM
1. SLOW PUMPING OR INSUFFICIENT PRESSURE.
Step 2. Inspect for clogged compressor air cleaner.
Clean element.
a. Removal and disassembly.
(1) Remove the compressor air cleaner from cylinder head by turning counterclockwise.
(2) See figure 3-3 for disassembly of compressor air cleaner.
(3) Remove screws (1) and lockwashers (2) and remove cover (3).
(4) Remove filter element (4) from base (5).
WARNING
Drycleaning solvent, P-D-680, used to clean parts is potentially dangerous to per-
sonnel and property. Avoid repeated and prolonged skin contact. Do not use near
open flame or excessive heat. Flash point of solvent is 100F (38C).
(5) Clean the air cleaner with cleaning solvent, item 5, App. D, and dry thoroughly.
(6) Clean filter element by blowing out with air or washing with an approved cleaning
solvent.
(7) Assemble element (4) into base (5) and install cover (3).
(8) Attach washers (2) and screws (1).
(9) Install cleaner on cylinder head by turning clockwise.
Step 2. Check for leaks in air lines, valves, fittings, etc.
Locate leaks and tighten or replace threaded parts.
a. Build up air pressure in compressor.
b. Using soapy water, check for leaks at all valves, fittings, etc.
c. Tighten threaded parts or, if necessary, replace damaged parts, after releasing pressure.
Step 3. Determine if compressor is too small for equipment being operated. Check the air pressure requirements of the equip-
ment being serviced. If it is greater than the output of this compressor, push this one aside and obtain a compressor unit
of a large enough capacity to perform the required job.
Step 4. Check to determine if engine is at correct speed
WARNING
Operation of this equipment presents a noise hazard to personnel in the area. The
noise level exceeds the allowable limits for unprotected personnel, Wear ear
muffs or earplugs which were fitted by a trained personnel.
Adjust the engine speed governor control to obtain correct speed.
a. See figure 4-13 for adjustment on Models 1A08-1 and 1A08-2.
(1) Remove screws and remove front throttle housing cover and gasket.
(2) Loosen setscrew and release governor control rod. Push throttle level down as far as
possible. Hold governor control rod in downward position, and move throttle lever up about
1/16 inch.
(3) Tighten setscrew and inspect linkage for free play by manually operating carburetor
throttle shaft.
(4) To regulate speed of engine, loosen nut and turn control" rod assembly clockwise to in-
crease, or counterclockwise to decrease engine speed.
4-27
