462:
474:
486:
42:
450:
1606:
384:
1615:
437:
towing the 155‑mm gun and 8‑in. howitzer. The chassis was designated M121. It had a 14 ft (4.27 m) steel cargo body with folding troop seats, bows and canvas cover. A single front-mounted
Garwood DSA716 45,000 lb (20,000 kg) capacity winch was fitted, and a chain hoist at rear for
369:
A standardized REO designed cab, also used in the 2 1/2 and 5‑ton trucks, was used. It had hinged doors with roll-up windows, a folding windshield, and a removable canvas roof. A hard roof could be fitted. With the same cabs and similarly designed fenders and hoods, the main visual difference between
365:
The M15A2 was the trailer that the M123 was intended to tow. It had a higher load plate and larger coupling pin than a standard semi-trailer. Early M123 had a larger fifth wheel mounted above the frame rails, but as more standard trailers were used, the M123C and all following models had lowered
327:
on the outer ends and allowed a tighter turning radius. The two rear axles were a double reduction type. Final drive ratios were 9.02:1 for gas powered trucks and 10.11:1 for diesels. The driveline for every M123 and M125 was built by Mack, regardless of who manufactured the rest of the truck.
391:
The M123 was used to tow semi-trailers carrying MBT's (in conjunction with the M15A1 and later the M747 semi-trailers) superseding the M26(A1) Pacific "Dragon Wagon" and the semi-trailers carrying engineering equipment (in conjunction with the M127 low bed semi-trailers).
319:
with the transfer case mounted solidly to the rear of the transmission. This transmission was direct in 5th. The transfer case had a 2.50:1 low range, engaged the front axle, and had a power take-off to operate the winch(es).
249:-ton, 6x6 truck), was chosen. Designed as an entire family of trucks, only the semi-tractor and cargo/prime mover were built. 392 M123 were built between 1955 and 1957 and 552 M125 were built between 1957 and 1958.
311:
developing 300 hp (220 kW) at 3000 rpm and 580 lbf⋅ft (786 N⋅m) torque at 2100 rpm. This engine was also retrofitted into M123 to make M123E2. No M125 were converted to diesel power.
355:
were used. The M123 was able to control the trailer brakes independently of the tractor. The M125 had electrical connections for the artillery piece brakes. In both models, the tire size was 14.00x24.
507:
205:
348:, the rear tandem beam axles were mounted on a leaf sprung "walking beam" type suspension. All models shared a 181 inches (4.60 m) wheelbase (measured from the 1st to the 3rd axles).
1151:
1655:
1618:
1609:
502:
1640:
252:
In 1965 CONDEC began building 3188 diesel powered M123A, Mack began building 420 in 1968. In 1969 Mack then upgraded 210 gas engine models to diesel power.
1200:
1317:
1144:
1378:
1404:
984:
261:
In addition to the US Army, the M123 was used by the U.S. Marine Corps and exported to U.S. allies in such countries as
Australia and Spain.
219:
was a heavy cargo truck version of the M123. The M123 was used to tow tank transporter trailers while the M125 towed field artillery pieces.
942:
227:
In 1949 the US Army set a requirement for a family of extra heavy-duty 10‑ton (9,072 kg) load rated, off-road, 6x6 tactical trucks.
1421:
1373:
1137:
715:
1353:
1215:
1537:
1255:
756:
725:
704:
255:
With the Army using more self‑propelled artillery, the need for prime movers was reduced, no follow‑up orders for M125 were made.
1409:
1297:
1282:
1272:
1267:
517:
1348:
1343:
1650:
1645:
1368:
461:
362:. Different M123 models had either one or two winches mounted behind the cab, all M125 had a single winch at the front.
1477:
1103:
473:
802:
304:
977:
358:
The main differences between various chassis was the location of the 45,000 lb (20,000 kg) winches and
1416:
872:
349:
316:
1098:
366:
fifth wheels. The pin remained larger, so any trailer towed by any M123 had to have an interchangeable pin.
820:
TM 9-2320-206-20 Organizational Maint. Manual for Truck, Tractor, 10-ton, 6X6, M123, and Truck, Cargo, M125
1426:
1363:
1302:
1292:
1129:
292:
258:
Both M123 and M125 saw service in the
Vietnam War. M123 tractors remained in Army service into the 1990s.
766:
1482:
278:
1093:
17:
1161:
1063:
970:
512:
359:
1058:
1580:
1487:
1073:
275:
1552:
449:
908:
768:
TM 9-2320-206-10 Operator's manual for Truck, Tractor, 10-ton, 6X6, M123, and Truck, Cargo, M125
485:
803:"TM 9-2320-206-12 Oper. Maint. Manual Truck, Tractor 10-ton, 6X6, M123, and Truck, Cargo, M125"
1088:
938:
752:
721:
700:
731:
1588:
1436:
1307:
1195:
1113:
1497:
784:
324:
209:
854:
836:
818:
370:
these three models was the size of the vehicle and the scale of the cab to the vehicle.
937:
Jane's
Military Vehicles and Ground Support Equipment 1984, pages 486 and 465 (M125),
1634:
1454:
1312:
1108:
1068:
1053:
1032:
1027:
414:
M123A1C, built from 1965 to 1969 by CONDEC, had a diesel engine and single rear winch
337:
308:
284:
1521:
1472:
1464:
1449:
1210:
1012:
956:
952:
948:
434:
411:
M123A1 had a single rear winch and a V‑8 diesel engine (300 hp (224 kW)).
212:
41:
892:
TM 9-2815-213-34 DS and GS Maint. Manual for Engine, Diesel, Cummins Model V8-300
856:
TM 9-2320-206-34P DS. & GS. Maint. Parts & Tools Truck, 10-ton, 6x6, M123
1593:
1083:
1007:
993:
522:
383:
345:
315:
The drivetrain was a repeat of that in the Mack NO, with a Mack TRDXT72 5 speed
228:
1542:
1516:
1506:
1205:
1118:
405:
M123C had a single mid-ship winch and low mounted fifth wheel, gasoline engine
352:
288:
931:
TM 9-8003-1 (25 June 1956) Ordnance Maint. for Engine, Accessories and Clutch
1511:
1394:
1287:
1277:
408:
M123D had dual mid-ship winches and low mounted fifth wheel, gasoline engine
341:
281:
838:
TM 9-2320-206-20P Org. Maint. Parts & Tools Truck, 10-ton, 6x6, M123
1570:
1565:
1048:
1022:
1017:
890:
430:
323:
The front axle was an unusual triple reduction type which did not need
300:
232:
1560:
1250:
296:
934:
TM 9-2320-206-ESC (ESC stands for
Equipment Serviceability Criteria)
402:
M123 had dual winches and high mounted fifth wheel, gasoline engine
1260:
382:
274:
All M123 and M125 built in the 1950s had a LeRoi T‑H844 engine, a
1358:
925:
ORD 7 SNL G-792 (31 January 1958) Section I, LeRoi engine parts.
1133:
966:
603:
601:
599:
597:
584:
582:
580:
578:
576:
574:
962:
674:
672:
647:
645:
620:
618:
616:
546:
544:
542:
540:
538:
417:
M123E1 were M123's that were upgraded with the diesel engine.
561:
559:
190:
877:. US Depts. of the Army. February 1953. pp. 101, 102
910:
TM 10-1679 Maint Manual for Mack Models NO 2, 3, & 6
786:
TM 9-2320-206-10HR Hand
Receipt Truck, 10-ton, 6x6, M123
433:
as a heavy cargo transport vehicle; it also served as a
299:
at 1700 rpm. The M123A1 built in the 1960s had a
749:
A Record of
Military Macks in the Services and Beyond
1579:
1551:
1530:
1496:
1463:
1435:
1387:
1326:
1224:
1169:
1041:
1000:
189:
177:
169:
161:
149:
136:
128:
120:
112:
107:
96:
88:
80:
72:
67:
59:
51:
32:
1619:List of soft-skinned vehicles of the US military
957:http://olive-drab.com/idphoto/id_photos_m125.php
678:
651:
636:
624:
550:
503:List of U.S. military vehicles by model number
1145:
978:
699:(3 ed.). Victory WW2. pp. 380–382.
8:
420:M123E2 with dual rear winches, diesel engine
303:V8‑300, a 785 cu in (12.9 L)
1614:
1152:
1138:
1130:
985:
971:
963:
717:Standard Catalog of U.S. Military Vehicles
663:
607:
29:
1656:Military vehicles introduced in the 1950s
720:(2 ed.). Krause. pp. 223–229.
124:23 feet 4 inches (7.11 m)
565:
534:
445:
140:9 feet 3 inches (2.82 m)
132:9 feet 6 inches (2.90 m)
1610:Military vehicles of the United States
751:. After the Battle. pp. 114–116.
295:and 725 lbf⋅ft (983 N⋅m) of
18:Mack M123 tractor truck and M125 truck
805:. US Dept. Of the Army. February 1960
588:
231:design, influenced by their WWII era
116:32,490 lb (14,740 kg) empty
7:
1641:Military trucks of the United States
1354:Family of Medium Tactical Vehicles
25:
1538:Ranger Special Operations Vehicle
340:chassis type was used. The front
276:844 cu in (13.8 L)
1613:
1605:
1604:
518:Mack NM Truck, 6-Ton, 6x6, Cargo
508:List of supply catalog G-numbers
484:
472:
460:
448:
40:
34:M123 and M125 10-ton 6x6 truck
1473:AM General / Freightliner M915
97:
1:
1201:Willys M274 "Mechanical Mule"
895:. US Dept. Of the Army. 1972
859:. US Dept. of the Army. 1972
841:. US Dept. Of the Army. 1977
823:. US Dept. Of the Army. 1971
789:. US Dept. Of the Army. 1978
771:. US Dept. Of the Army. 1977
697:US Military Wheeled Vehicles
928:TM 9-8002 (1 November 1955)
874:TM 9-2800 Military Vehicles
185:300 mi (482.8 km)
1672:
195:42 mph (68 km/h)
173:Beam axles on leaf springs
1602:
1364:General Dynamics Flyer 72
1293:General Dynamics Flyer 60
747:Vanderveen, Bart (1998).
467:M15A2 (top) M172 (bottom)
289:297 hp (221 kW)
157:297 hp (221 kW)
144:
60:Place of origin
39:
695:Crismon, Fred W (2001).
591:, pp. 283–288, 290.
479:M123 towing M747 trailer
215:introduced in 1955. The
1500:tractors & carriers
1488:I.H. M39 / M52 and M246
1395:Caterpillar M520 "Goer"
1256:Ground Mobility Vehicle
679:TM 9-2320-206-12 (1960)
652:TM 9-2320-206-20 (1971)
637:TM 9-2815-213-34 (1972)
625:TM 9-2320-206-34 (1972)
551:TM 9-2320-206-10 (1977)
429:The M125 succeeded the
1478:AM General M931 / M932
388:
1507:M8 high-speed tractor
1164:introduced after 1945
1162:soft-skinned vehicles
714:Doyle, David (2003).
438:handling ammunition.
386:
108:Specifications (M123)
1651:Six-wheeled vehicles
1646:Mack Trucks vehicles
1581:All-terrain vehicles
270:Engine and driveline
155:(for other see text)
1553:Amphibious vehicles
1531:Specialist vehicles
913:. US War Dept. 1943
610:, pp. 82, 115.
568:, pp. 380–382.
305:naturally aspirated
1589:John Deere M-Gator
734:on 15 January 2018
389:
68:Production history
1625:
1624:
1594:Polaris MRZR-(D)2
1437:Tank transporters
1388:8–16.5 ton trucks
1369:International M39
1268:Chevrolet CUCV II
1211:Willys MD / M38A1
1127:
1126:
664:TM 10-1679 (1943)
608:Vanderveen (1998)
387:1963 Mack M123A1C
199:
198:
165:5 speed x 2 range
55:10-ton 6x6 trucks
46:M123 Semi-tractor
27:10-ton 6x6 trucks
16:(Redirected from
1663:
1617:
1616:
1608:
1607:
1336:
1335:
1331:
1308:Kaiser Jeep M715
1283:Dodge M880s CUCV
1251:AM General HMMWV
1243:
1242:
1238:
1233:
1232:
1228:
1196:M422 Mighty Mite
1188:
1187:
1183:
1178:
1177:
1173:
1154:
1147:
1140:
1131:
1079:M123/M125 series
987:
980:
973:
964:
922:
920:
918:
904:
902:
900:
886:
884:
882:
868:
866:
864:
850:
848:
846:
832:
830:
828:
814:
812:
810:
798:
796:
794:
780:
778:
776:
762:
743:
741:
739:
730:. Archived from
710:
682:
676:
667:
661:
655:
649:
640:
634:
628:
622:
611:
605:
592:
586:
569:
563:
554:
548:
488:
476:
464:
452:
325:universal joints
248:
247:
243:
240:
192:
103:3580 (+552 M125)
99:
44:
35:
30:
21:
1671:
1670:
1666:
1665:
1664:
1662:
1661:
1660:
1631:
1630:
1628:
1626:
1621:
1612:
1598:
1575:
1547:
1526:
1492:
1459:
1431:
1410:M1120 HEMTT LHS
1383:
1349:AM General M939
1344:AM General M809
1333:
1329:
1328:
1322:
1240:
1236:
1235:
1230:
1226:
1225:
1220:
1206:Willys MC / M38
1185:
1181:
1180:
1175:
1171:
1170:
1165:
1158:
1128:
1123:
1037:
996:
991:
955:on Olive Drab (
916:
914:
907:
898:
896:
889:
880:
878:
871:
862:
860:
853:
844:
842:
835:
826:
824:
817:
808:
806:
801:
792:
790:
783:
774:
772:
765:
759:
746:
737:
735:
728:
713:
707:
694:
691:
686:
685:
677:
670:
662:
658:
650:
643:
635:
631:
623:
614:
606:
595:
587:
572:
564:
557:
549:
536:
531:
499:
492:
489:
480:
477:
468:
465:
456:
453:
444:
427:
381:
376:
344:was mounted on
334:
285:gasoline engine
272:
267:
245:
241:
238:
236:
225:
182:
180:
156:
154:
145:
47:
33:
28:
23:
22:
15:
12:
11:
5:
1669:
1667:
1659:
1658:
1653:
1648:
1643:
1633:
1632:
1623:
1622:
1603:
1600:
1599:
1597:
1596:
1591:
1585:
1583:
1577:
1576:
1574:
1573:
1571:LARC-LX "BARC"
1568:
1563:
1557:
1555:
1549:
1548:
1546:
1545:
1540:
1534:
1532:
1528:
1527:
1525:
1524:
1519:
1514:
1509:
1503:
1501:
1494:
1493:
1491:
1490:
1485:
1480:
1475:
1469:
1467:
1465:Tractor trucks
1461:
1460:
1458:
1457:
1452:
1447:
1441:
1439:
1433:
1432:
1430:
1429:
1424:
1419:
1414:
1413:
1412:
1402:
1397:
1391:
1389:
1385:
1384:
1382:
1381:
1376:
1371:
1366:
1361:
1356:
1351:
1346:
1340:
1338:
1324:
1323:
1321:
1320:
1318:HDT Storm SRTV
1315:
1310:
1305:
1303:GM Defence ISV
1300:
1295:
1290:
1285:
1280:
1275:
1273:Chevrolet LSSV
1270:
1265:
1264:
1263:
1258:
1247:
1245:
1222:
1221:
1219:
1218:
1213:
1208:
1203:
1198:
1192:
1190:
1167:
1166:
1159:
1157:
1156:
1149:
1142:
1134:
1125:
1124:
1122:
1121:
1116:
1111:
1106:
1101:
1096:
1091:
1086:
1081:
1076:
1071:
1066:
1061:
1056:
1051:
1045:
1043:
1039:
1038:
1036:
1035:
1030:
1025:
1020:
1015:
1010:
1004:
1002:
998:
997:
992:
990:
989:
982:
975:
967:
961:
960:
945:
935:
932:
929:
926:
923:
905:
887:
869:
851:
833:
815:
799:
781:
763:
757:
744:
726:
711:
705:
690:
687:
684:
683:
668:
656:
641:
629:
612:
593:
570:
566:Crismon (2001)
555:
533:
532:
530:
527:
526:
525:
520:
515:
510:
505:
498:
495:
494:
493:
490:
483:
481:
478:
471:
469:
466:
459:
457:
454:
447:
443:
440:
426:
423:
422:
421:
418:
415:
412:
409:
406:
403:
380:
377:
375:
372:
333:
330:
279:overhead valve
271:
268:
266:
265:Specifications
263:
224:
221:
197:
196:
193:
191:Maximum speed
187:
186:
183:
178:
175:
174:
171:
167:
166:
163:
159:
158:
151:
147:
146:
142:
141:
138:
134:
133:
130:
126:
125:
122:
118:
117:
114:
110:
109:
105:
104:
101:
94:
93:
90:
86:
85:
82:
78:
77:
74:
70:
69:
65:
64:
61:
57:
56:
53:
49:
48:
45:
37:
36:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1668:
1657:
1654:
1652:
1649:
1647:
1644:
1642:
1639:
1638:
1636:
1629:
1620:
1611:
1601:
1595:
1592:
1590:
1587:
1586:
1584:
1582:
1578:
1572:
1569:
1567:
1564:
1562:
1559:
1558:
1556:
1554:
1550:
1544:
1541:
1539:
1536:
1535:
1533:
1529:
1523:
1520:
1518:
1515:
1513:
1510:
1508:
1505:
1504:
1502:
1499:
1495:
1489:
1486:
1484:
1481:
1479:
1476:
1474:
1471:
1470:
1468:
1466:
1462:
1456:
1455:Oshkosh M1070
1453:
1451:
1448:
1446:
1443:
1442:
1440:
1438:
1434:
1428:
1425:
1423:
1420:
1418:
1415:
1411:
1408:
1407:
1406:
1405:Oshkosh HEMTT
1403:
1401:
1398:
1396:
1393:
1392:
1390:
1386:
1380:
1377:
1375:
1372:
1370:
1367:
1365:
1362:
1360:
1357:
1355:
1352:
1350:
1347:
1345:
1342:
1341:
1339:
1337:–7 ton trucks
1325:
1319:
1316:
1314:
1313:M1161 Growler
1311:
1309:
1306:
1304:
1301:
1299:
1298:GM M1009 CUCV
1296:
1294:
1291:
1289:
1286:
1284:
1281:
1279:
1276:
1274:
1271:
1269:
1266:
1262:
1259:
1257:
1254:
1253:
1252:
1249:
1248:
1246:
1223:
1217:
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1197:
1194:
1193:
1191:
1168:
1163:
1155:
1150:
1148:
1143:
1141:
1136:
1135:
1132:
1120:
1117:
1115:
1112:
1110:
1107:
1105:
1102:
1100:
1097:
1095:
1092:
1090:
1087:
1085:
1082:
1080:
1077:
1075:
1072:
1070:
1067:
1065:
1062:
1060:
1057:
1055:
1052:
1050:
1047:
1046:
1044:
1040:
1034:
1031:
1029:
1026:
1024:
1021:
1019:
1016:
1014:
1011:
1009:
1006:
1005:
1003:
1001:In production
999:
995:
988:
983:
981:
976:
974:
969:
968:
965:
958:
954:
950:
946:
944:
943:0 7106 0794 6
940:
936:
933:
930:
927:
924:
912:
911:
906:
894:
893:
888:
876:
875:
870:
858:
857:
852:
840:
839:
834:
822:
821:
816:
804:
800:
788:
787:
782:
770:
769:
764:
760:
758:1-870067-09-6
754:
750:
745:
733:
729:
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63:United States
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1483:CCC M920 MET
1450:Oshkosh M911
1444:
1422:Oshkosh LVSR
1399:
1374:Oshkosh MTVR
1244:ton vehicles
1189:ton vehicles
1160:US military
1089:MC/MR series
1078:
1042:Discontinued
947:Articles on
915:. Retrieved
909:
897:. Retrieved
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879:. Retrieved
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748:
736:. Retrieved
732:the original
716:
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632:
589:Doyle (2003)
428:
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360:fifth-wheels
357:
346:leaf springs
338:ladder frame
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317:transmission
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213:semi-tractor
202:
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162:Transmission
84:Mack, CONDEC
81:Manufacturer
1427:Oshkosh PLS
1417:Oshkosh LVS
1216:M151 "MUTT"
1114:Super-Liner
1094:Metro-Liner
994:Mack Trucks
899:3 September
523:Mack Trucks
435:prime mover
353:drum brakes
287:developing
179:Operational
100: built
1635:Categories
1543:Unimog 419
1517:M116 Husky
689:References
170:Suspension
1522:M973 SUSV
1512:M76 Otter
1445:Mack M123
1400:Mack M125
1359:Ford M656
1288:Gama Goat
1278:Dodge M43
1104:NO Series
1099:NM Series
1064:EH series
1059:CH series
1049:AC series
917:16 August
827:16 August
775:30 August
342:beam axle
217:Mack M125
203:Mack M123
92:1955–1969
1109:R series
1074:L series
1069:F series
1054:B series
1033:TerraPro
1028:Pinnacle
881:9 August
863:9 August
845:9 August
809:9 August
793:9 August
738:26 April
497:See also
396:Variants
350:Full air
89:Produced
73:Designer
1566:LARC-XV
1498:Tracked
1379:REO M35
1332:⁄
1239:⁄
1229:⁄
1184:⁄
1174:⁄
1013:Granite
513:Mack EH
442:Gallery
431:Mack NO
332:Chassis
301:Cummins
244:⁄
223:History
1561:LARC-V
1084:Magnum
1008:Anthem
941:
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724:
703:
455:M123E2
374:Models
297:torque
229:Mack's
206:(G792)
150:Engine
137:Height
121:Length
1261:M1151
1119:Titan
529:Notes
181:range
129:Width
953:M125
951:and
949:M123
939:ISBN
919:2015
901:2015
883:2015
865:2015
847:2015
829:2015
811:2015
795:2015
777:2015
753:ISBN
740:2018
722:ISBN
701:ISBN
491:M125
425:M125
379:M123
201:The
113:Mass
76:Mack
52:Type
307:V8
293:rpm
210:6x6
98:No.
1637::
1234:–1
1023:MD
1018:LR
671:^
644:^
615:^
596:^
573:^
558:^
537:^
398::
336:A
282:V8
233:NO
1334:2
1330:1
1327:2
1241:4
1237:3
1231:4
1227:3
1186:2
1182:1
1179:–
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