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TM 9-2330-272-14
1-10. DIFFERENCES BETWEEN MODELS.
a. The M131A4 and M131A4C semitrailers have four fuel tank compartments with a capacity of 1250 gl
(4731 l) each. The M131A5 and M131A5C semitrailers have two fuel tank compartments with a capacity of 2500 gl
(9463 l) each.
b. The M131A4 and M131A5 semitrailers are used for fuel transport or fuel transfer only. The M131A4C and
M131A5C semitrailers may be used for fuel transport, fuel transfer, or fuel servicing of containers, ground vehicles, or
aircraft with over-the-wing fueling facilities with a maximum fuel acceptance rate of 225 gpm (852 Ipm).
c. The M131A4 and M131A5 semitrailers consist of an integral fuel tank with one curbside cabinet housing
an air-cooled auxiliary engine and fuel dispensing pump unit, fuel manifold, flow control valves, and static reel. The
M131A4C and M131A5C semitrailers consist of an integral fuel tank with one curbside cabinet housing an air-cooled
auxiliary engine and fuel dispensing pump unit and one roadside cabinet housing a fuel manifold, flow control valves,
volumetric meter, static reel, hose reels, and nozzles.
d. Early model lighting system consists of two service taillights, blackout taillight assemblies, and
clearance marker lights. Late model electrical system consists of two composite taillights and clearance marker
lights.
e. Similar models of semitrailers were produced by different manufacturers. As a result, minor differences in
design among these semitrailers exist. The serial numbers and contract numbers listed below should be indicated in
any reports, inquiries, or recommendations.
Model No.
Serial No.
Manufacturer
Contract No. 20-113-AMC
M131A4
1-115
City Tank Corp.
DA-11-022-AMC-1894 (T)
M131A4C
1-113
The Heil Co.
DA-11-022-AMC-2012 (T)
M131A4C
114-340
Butler Mfg. Co.
DA-11-022-AMC-1864 (T)
M131A4C
341-396
The Heil Co.
DA-11-022-AMC-2012 (T)
M131A4C
397-497
Butler Mfg. Co.
DA-11-022-AMC-1864 (T)
M131A4C
498-607
The Heil Co.
DA-11-022-AMC-2264 (T)
M131A5
1-840
The Heil Co.
DA-11-022-AMC-5431 (T)
M131A5
841-1640
The Heil Co.
DA-11-022-AMC-10112 (T)
M131A5
1641-2635
Fruehauf Trailer Co.
DA-11-022-AMC-10420 (T)
M131A5
2636-2644
The Heil Co.
DA-11-022-AMC-10112 (T)
M131A5C
1-428
Fruehauf Trailer Co.
DA-11-022-AMC-11226 (T)
f. Differences among M131A4C models are as follows:
(1) Instrument Panel. M131A4C semitrailers with serial numbers 1-340 are equipped with the
instrument panel in the curbside cabinet. M131A4C semitrailers with serial numbers 341 and above are equipped with
the instrument panel near the equipment cabinet on the roadside of the semitrailer.
(2) Filter-separator, M131A4C semitrailers with serial numbers 1-113 are equipped with a
filter-separator designed by Warner Lewis. M131A4C semitrailers with serial numbers 114 and above are equipped
with a filter-separator designed by Bowser, Inc.
1-20
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