Minutiae


Registration numbers

The DMS/DM classes were numbered in a common sequence from 1 to 2646. The registration number matched the last 3 digits of the fleet number (except DM 1000 & DMS 2000), a practice that went back to Trolleybus days.

DMS 1 - DMS 136 EGP 1J - EGP 136J
DMS 137 - DMS 414JGF 137K - JGF 414K
DMS 415 - DMS 695MLK 416L - MLK 695L
DMS 696 - DMS 900TGX 696M - TGX 900M
DMS 901 - DMS 917SMU 901N - SMU 917N
DM 918 - DM 947SMU 918N - SMU 947N
DM 948 - DM 999GHV 948N - GHV 999N
DM 1000 GHV 500N
DM 1001 - DM 1124GHV 1N - GHV 124N
DM 1125 - DM 1247KUC 125P - KUC 247P
DMS 1248 - DMS 1297JGU 248K - JGU 297K
DMS 1298 - DMS 1499MLH 298L - MLH 499L
DMS 1500 - DMS 1702THM 500M - THM 702M
DM 1703 - DM 1720THM 703M - THM 720M
DM 1721 - DM 1739SMU 721N - SMU 739N
DM 1740 - DM 1832GHM 740N - GHM 832N
DMS 1833 - DMS 1897GHM 833N - GHM 897N
DMS 1898 - DMS 1999KUC 898P - KUC 999P
DMS 2000 KJD 500P
DMS 2001 - DMS 2024KJD 1P - KJD 24P
DMS 2025 - DMS 2057OUC 25R - OUC 57R
DMS 2058 - DMS 2122KJD 58P - KJD 122P
DMS 2123 - DMS 2267OJD 123R - OJD 267R
DMS 2268 - DMS 2346THX 268S - THX 346S
DMS 2347 - DMS 2472OJD 347R - OJD 472R
DMS 2473 - DMS 2526THX 473S - THX 526S
DM 2527 - DM 2646THX 527S - THX 646S


Classification Codes

London Transport gave chassis codes and body codes to its buses. For example DMS 1-17 had chassis code 1DM and body code DM1. The complete vehicles were known as 1DM1.

A very basic break down would be :-

CHASSIS CODEENGINE
1DMGardner 6LXB
2DMLeyland O.680
3DMLeyland O.690
turbocharged

BODY CODEBODY BATCH
DM1PRV standard 1971
DM2not usednot used
DM3PRV standard1972-1974
DM4MCW standard1972-1974
DM5PRV standard1975-1976
DM6PRV B201975-1976
DM7MCW standard 1975-1976
DM8MCW B201975-1976

Standard is an un-official term used to describe the non B20s.
Other points are :- All DMs had Leyland engines (except DM 1199) and had body codes DM3/3, DM4/3 & DM6/1.

A more detailed break down of chassis codes

1DM1-117Gardner
2/1DM118-131, 133-367Gardner
3/1DM368-494, 1248-1371Gardner
4/1DM608-611, 617-619, 637-639, 655, 659-660, 1452-1467, 2038-2057, 2128-2246Gardner
2DM495-587, 1372-1427Leyland
1/2DM132Leyland
2/2DM588-607, 612-616, 620-636, 640-654, 656-658, 661-853, 855-1140, 1145, 1185, 1428-1451, 1468-1906Leyland
3/2DM1141-1144, 1146-1184, 1186-1247, 1907-2037, 2058-2127Leyland
3DM854, 2247-2646Leyland B20

DMS 864, DM 1199, DMS 1968, DMS2059 and DMS 2120 had Rolls Royce engines but this did not affect the chassis codes.

A more detailed break down of body codes

DM11-17, 118-167PRVDMSHeadlights original position
DM1/118-117PRVDMSrecoded DM1
DM1/2168-367PRVDMSHeadlights re-positioned
DM3368-585, 595-596PRVDMS'1972' bodies
DM3/1586-594, 597-853, 855-917PRVDMS'1973/4' bodies
DM3/3918-1217PRVDM'1973/4' bodies
DM3/5854PRVDMSPrototype B20
DM41248-1427MCWDMS'1972' bodies
DM4/11428-1702, 1833-1967MCWDMS'1973/4' bodies
DM4/31218-1247, 1703- 1832MCWDM'1973/4' bodies
DM52058-2166PRVDMS'1975/6' bodies
DM62347-2526PRVDMSB20
DM6/12527-2646PRVDMB20
DM71968-2057, 2167-2246MCWDMS'1975/6' bodies
DM82247-2346MCWDMSB20

Further sub-codes were used to denote buses with fareboxes or ticket cancelling equipment.


Engines

Gardner 6LXBDMS 1-131
Leyland O.680DMS 132
Gardner 6LXBDMS 133-494
Leyland O.680DMS 495-607
Gardner 6LXBDMS 608-611
Leyland O.680DMS 612-616
Gardner 6LXBDMS 617-619
Leyland O.680DMS 620-636
Gardner 6LXBDMS 637-639
Leyland O.680DMS 640-654
Gardner 6LXBDMS 655
Leyland O.680DMS 656-658
Gardner 6LXBDMS 659-660
Leyland O.680DMS 661-853
Leyland O.690DMS 854
Leyland O.680DMS 855-863
Rolls Royce EagleDMS 864
Leyland O.680DMS 865-917
Leyland O.680DM 918-1198
Rolls Royce EagleDM 1199
Leyland O.680DM 1200-1247
Gardner 6LXBDMS 1248-1371
Leyland O.680DMS 1372-1451
Gardner 6LXBDMS 1452-1467
Leyland O.680DMS 1468-1702
Leyland O.680DM 1703-1832
Leyland O.680DMS 1833-1967
Rolls Royce EagleDMS 1968
Leyland O.680DMS 1969-2037
Gardner 6LXBDMS 2038-2057
Leyland O.680DMS 2058
Rolls Royce EagleDMS 2059
Leyland O.680DMS 2060-2119
Rolls Royce EagleDMS 2120
Leyland O.680DMS 2121-2127
Gardner 6LXBDMS 2128-2246
Leyland O.690DMS 2247-2526
Leyland O.690DM 2527-2646


Bodywork

Park RoyalDMS 1-917
Park RoyalDM 918-1217
MCWDM 1218-1247
MCWDMS 1248-1702
MCWDM 1703-1832
MCWDMS 1833-2057
Park RoyalDMS 2058-2166
MCWDMS 2167-2346
Park RoyalDMS 2347-2526
Park RoyalDM 2527-2646

Body numbers

London Transport gave it's buses body numbers, the sequence had reached 9227 when the last RT had been delivered. The Routemasters were numbered in a new series from 1 upwards, prefixed by a 'B'. The A series was used for the XA, XF, and RC classes. The 'C' series was used for the Merlins and the 'E' series for the Swifts. Perhaps by coincidence or perhaps not the DMS / DM classes had body numbers D1 to D2646. As no body swapping occurred with the Fleetlines the body and fleet numbers always matched up. Both numbers were carried on the circuit breaker covers in the cab. The practice of allocating body numbers came to an end with the delivery of the last DM.



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