TM 5-4310-335-14
(1) Frame assembly
(2) Gasoline Engine
(3) Pneumatic accessories
(4) Compressor/cooler assembly
b. Frame Assembly. The frame assembly consists of the pneumatic system mounting frame assembly with wheels
and a roof assembly. The frame assembly includes the handle, retractable tow bar and support foot, and lifting and tie-
down rings. The roof assembly includes the instrument panel and engine fuel tank brackets. Constructed of square tubular
aluminum, the frame assembly provides protection for the pneumatic system and facilitates transportation.
c. Gasoline Engine. The gasoline engine is comprised of the engine and those detailed components required to
support the gasoline engine, when in operation. The gasoline engine is a four-cycle, two-cylinder power plant which
provides 3.75 horsepower at 3600 rpm using unleaded gasoline as the combustion medium. An integral sump provides
lubrication for the engine. The engine is Government Furnished Equipment.
d. Pneumatic Accessories. The pneumatic accessories consists of those detailed components used to support
the air compressor assembly group in the pneumatic system, during operation. This group includes the pressure regulator,
gages, sphere, moisture separator, dehydrator housing and cartridge, check valve filter, shut-off valves, back pressure
valve, unloader valve, hoses and required fittings.
e. Compressor/Cooler Assembly. The compressor/cooler assembly consists of those component parts directly
used to produce and cool the high pressure compressed air. The component parts are the compressor, the intercoolers,
aftercooler, interstage relief valves, fan and inlet filter. The compressor is a four-stage radial reciprocating compressor with
an operating pressure of 3,000 pounds per square inch (210.9 kgs per sq cm) rotating at a maximum speed of 3600
revolutions per minute, in the surrounding temperature range of -25 . (-32 ) to +125 . (25 ).
F
C
F
C
f. A complete description, of applicable parts oriented to specific maintenance, of each group is contained in the
section in this manual covering the maintenance for each group. For purposes of orientation, the tow bar end of the ground
cart will be considered as the "front". The term "left" or "right" will be used in reference to the unit while viewing the unit
from the "front" end.
1-7. Differences in Models
This manual covers only the Walter Kidde air compressor.
1-8. Tabulated Data
absolute,
a. Compressor Specifications.
surrounding temperature of
Length, overall (tow bar stowed)54 in.
+60 (16 )
F
C
(137.16 cm)
and a speed of 3600 rpm
(tow bar extended)
78 in.
Temperature range (operating) -25 - +125OF
F
(198.12 cm)
(-32 C) - (52 C)
Width, overall
26 in.
Temperature range (storage)
65 F-+160 F
(66.64 cm)
(-54 C) - (72 )
Height, overall
34 in.
Lubrication
Pressure feed
(85.36 cm)
Lubricating oil
MIL-L-6085A, use following
Weight, dry (max.)
249 lb.
Formulation only:
112.95 kgm)
Formulation
b. Compressor.
401D manufactured by
Type
Reciprocating, radial
Lehigh
Stages
4
Chemical Products Co.,
Cylinders
4
Formulation L245X
Bores:
manufactured
1st stage
2.625 in.
by Anderson Oil Company,
(6.67 cm)
NSN 9150-00-753-4667
2nd stage
1.250 in.
or equivalent
(3.18 cm)
Oil sump capacity
3/4 pint approx.
3rd stage
0.625 in.
(.355 liter)
(1.59 cm)
Inlet air filter
40 micron
4th stage
0.300 in.
c.. Moisture Separator.
(.76 cm)
Operating pressure
3300 psi
Stroke
0.750 in.
(232 kgs per sq cm)
(1.91 cm)
Proof pressure
4950 psi
Rotation (facing fan end)
Counterclockwise
(348 kgs per sq cm)
Speed (rated)
3600 rpm max.
Minimum burst pressure
8250 psi
Operating pressure
3,000 psi
(580 kgs per sq cm)
(210.93 kgs per sq cm)
Minimum accumulated water capacity 13.5 cu. in.
Capacity
4.0 scfm with an inlet
(221.26 cc)
condition
of 29.92 in. Mercury
1-3
