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FOREWARD

This booklet summarises the codes required to report locomotive maintenance, repairs and refuelling, together with the more commonly used codes required to interpret the coded information contained in responses to on-line enquiries and unsolicited messages. Some notes to assist in the use of codes are also included where appropriate. It is always important to remember the relationship between Operating Status (OPRSTA) , Regular Maintenance (RMAINT) , Reason Out of Service (REASOS) , and Work Done (WKDONE) . The Expected Release Time (EXPTIM) for locomotives undergoing maintenance must be as accurate as possible, particularly when within the next eight hours so that control can make plans to use the locomotive in revenue earning service and ensure that further work is made available for the depot. Full details of all TOPS codes can be found in the red TOPS Code Guide Manual and all input procedures are in the green TOPS Procedure Manual. This booklet will not be updated between issues, and any relevant changes or additions notified on the amendment sheets issued for the Code Guide or Procedure Manual should be entered by hand. Remember that the more care taken to prepare on-line inputs correctly, the more useful will be the information available to all those making enquiries. TOPS is a REAL-TIME system.

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INDEX

PAGE DESCRIPTION

1-3  Depot Codes

4-5  Restricted Working Codes

6-7  Operating Status Codes

8 Regular Maintenance Codes

9-17 Reason Out of Service & Work Done Codes

18 Train Heat Codes

19 Brake Codes

19 Multiple Control Codes

19 Regional Codes

20 Special Characteristics Codes

20 Radio/Telephone Codes

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DEPOT CODES

 

 

 

1

 

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2

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BREL Workshops

 

 

 

Note

 

+ Indicates NOT valid as a refuelling location.

 

 

3

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RESTRICTED WORKING CODES (RESTWK)

 

Code Description

AO Air brake available only (dual braked locomotive)

VO Vacuum brake available only (Vacuum braked locomotive)

DM D.S.D defective and isolated.

NA AWS defective and isolated.

NR Dynamic brake defective.

FF Brake cylinders isolated, or similar locomotive brake defect. Special arrangements

required by Regional Maintenance Controller to move locomotive to repairing location

in accordance with Engineering Instructions G19. (Use of this code must be in

association with a pre-assignment to the appropriate repairing location) .

M2 Working on two traction motors only.

M3 Working on three traction motors only.

M4 Working on Four traction motors only.

M5 Working on Five traction motors only.

ND Electric power available only (electro-diesel locomotive).

NE Diesel power available only (electro-diesel locomotive).

OE Working on one engine only.

BO Steam heat available only (dual heated locomotive).

EO Electric heat available only (dual heated locomotive)

NH No train heating available

(locomotive fitted with train heating)

FW Not to work passenger or high speed freight trains (i.e. classification 1 to 6 inclusive).

LE To work light locomotive, or dead-in-tow, for repairs. (Use of this code must be in

association with a pre-assignment to the appropriate repairing location).

LW To work out and back from a locomotive maintenance depot as directed by Regional

Maintenance Control with responsibility for the depot .

MO To work only in multiple, with a locomotive not similarly restricted.

NM Not to work in multiple (locomotive fitted for multiple working) including class 47/7 locomotives unfit for push/pull services.

4

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Code Description

 

NS No slow speed available

OJ One journey only to the maintenance location specified by the preassignment

details.

RD Radio or telephone equipment defective.

RW Consult owning Regional Maintenance Controller for authority prior to each

journey. (Only to be applied in exceptional circumstances and where the use

of another code is not appropriate).

SD Sanders defective.

TR On test run in revenue – earning service. Consult owning Regional

Maintenance Controller foe authority before allocating further duties.

1L To work with No1 end leading only.

2L To work with No 2 end leading only.

 

Where a restriction shows two figures, this indicates a speed restriction: e.g. 45 max speed 45 mph,NB. Only to be used in 5 mph intervals between 05 and 95.

 

MR Multiple restrictions. Computer generated to indicate more than one restriction on outputs with space for one code only.

5

 

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OPERATING STATUS CODES (OPRSTA)

 

Code Long Form Code and Description

A WAITG WORKS

Awaiting transfer to, or en route to, BREL Workshops awaiting start of work.

This code should not be entered until locomotive is accepted for works

attention by Regional Shopping Controller. Until accepted for works ,

OPRSTA code X should be used with REASOS code DEC.

 

D WTG MTCE/REP

At a TMD awaiting start of maintenance or repair work.

Do not revert to this code once maintenance has commenced, even if work

subsequently ceases.

 

F Failure

Failure or accident in traffic. Can be used whilst loco is still shown working

a train, but should be changed to OPRSTA T, D, or X as soon as possible.

 

M WAITG MATERL

Waiting material whilst undergoing maintenance or repair work at a TMD.

The REASOS code entered should indicate the material required, or if more

than one item, that which is likely to affect the expected release time

(EXPTIM).

 

N Serviceable or Normal Status.

Note ; A loco in this status may be subject to a Restricted working.

 

R TOBESCRAPPED

Withdrawn from service for scrapping or conversion for use by a non-

Revenue earning department. This code can only be entered by the owning

Regional Maintenance Control.

The locomotive can only be moved dead-in-tow.

6

 

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Code Long Form Code and Description

S STORED OK

Stored in a serviceable condition,

but requiring examination before

being used. This code can only

be entered by the owning Regional

Maintenance Control.

 

T WAITG TRANSFER

Awaiting transfer to, or en route

to, a TMD for maintenance or repair.

Also to be used to show transfer

from one TMD to another for

maintenance or repair.

A preassignment must be used with

this code to indicate the depot to

which the locomotive is to be

transferred.

 

U STORED U/S

Stored in an unserviceable condition.

This code can only be entered by

the owing Regional Maintenance

Control.

 

W IN WORKS

In BREL Workshops or on a test run

from BREL Works, when used with

REASOS code TST.

This code must only be entered when

locomotive is at a BREL location.

 

X MTCE/REPAIR

Undergoing maintenance or repair

at a TMD or on a test run when used

with REASOS code TST.

7

 

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REGULAR MAINTENANCE CODES (RMAINT)

 

1  Cumulative Work Content Examinations

 

Code Description

 

A A Examination

B B Examination

C C Examination

D D Examination

E E Examination

F F Examination

*G G Examination

*H H Examination

*J J Examination

 

*G, H, and J are post shopping examinations

for electric locomotive only. When

these are carried out at the same time as

a cumulative examination (A to F

inclusive), the G, H, or J must be

reported using REASOS code GXM, HXM, or

JXM, concurrently with the cumulative

Exam.

 

2  Balanced Work Content Examinations

 

Code Description

 

L L Balanced Examination (A1)

M M Balanced Examination (A2)

P P Balanced Examination (A3)

Q Q Balanced Examination (A4)

R R Balanced Examination (A5)

S S Balanced Examination (A6)

T T Balanced Examination (A7)

V V Balanced Examination (A8)

W W Balanced Examination (A9)

X X Balanced Examination (A10)

Y Y Balanced Examination (A11)

Z Z Balanced Examination (A12)

 

3  Unscheduled Depot Repair

 

Code Description

 

N Unscheduled repair at a TMD, i.e.

No scheduled examination being

carried out.

 

4  BREL Workshops Overhaul/Repair

 

Code Description

 

K Classified repair

N Unclassified repair.

8

 

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REASON OUT OF SERVICE (REASOS) & WORK DONE (WKDONE)

CODES

 

REASOS & WKDONE Codes are grouped as

follows:

 

1 Preliminary Reports, which are

mainly used as initials reports of :

 

1.1 Shortages

1.2 Protective equipment operation

1.3 Defects in service

 

2  General Reports, which are more

specific codes relating to :

 

2.1  Depot exams

2.2  Depot or Works repairs

2.3  Withdrawals

 

3  Components, which indicate the

components :

 

3.1  Under repair

3.2  Causing casualties (also used in

the casualty reporting system)

3.3  To which repairs have been

carried out.

3.4  Not available when the locomotive

is awaiting material.

 

1  Preliminary Reports

 

Codes in this section may only be used as

REASOS except those marked*, which may

also be used as a WKDONE provided no

relevant defect was found and rectified.

 

1.1  Shortages

 

Code Description

 

OBW *Out of boiler Water

OOF * Out of fuel

OOS * Out of sand

 

1.2  Protective Equipment

 

Code Description

 

BHZ Buchholz relay tripped

AEF Auxiliary Earth Fault relay tripped

PEF Power Earth Fault relay tripped

MCB Fuse blown or Miniature Circuit

Breaker tripped

OLZ Overload relay tripped

OSZ Overspeed tripped

WSP Wheelspin/Wheelslip

9

 

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1.3  Defects in Service

 

Code Description

 

FRE Fire on locomotive

ESD Engine shut down

LOP Loss of power (complete)

LWP Low Power

NOK Unusual noise

SML Unusual smell

VIB Unusual vibration

 

CLK Coolant Leak

FLK Fuel Leak

HWT Coolant overheating

LWA Coolant low

OLK Oil Leak

 

ABI Air brake defective

ALK Air leak

AWA AWS defective

DSD DSD defective

VBE Vacuum brake defective

 

CCD Traction controls in cab defective

INS Instruments defective

 

BDY Body defect

RDG Bad riding

WBK Window broken

 

EHD Electric heating defective

SHD Steam heating defective

WLK Boiler water leak

 

OTD Other defect

 

2. General Reports

 

Codes in this section may be used as

REASOS or WKDONE except those marked :

 

r which can only be used as REASOS

w which can only be used as WKDONE

Note: m indicates jobs which it is

mandatory to report as Work Done.

 

2.1 Depot Exams

 

Code Description

 

GXM m G Exam ) to be used when a post

HXM m H Exam ) shopping exam is carried

JXM m J Exam ) out on a.c. locomotives at

) the same time as a

) scheduled examination.

XAM Scheduled examination only.

10

 

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2.2  Depot or Works Repairs

 

Code Description

 

Works Overhauls and Repairs

 

LGT m Light overhaul

INT m Intermediate overhaul

GEN m General overhaul

HGO m Heavy General overhaul

WEX r Works exam prior to unscheduled

Repair

REC Rectification after works overhaul

or repair

WRX Recommissioning after works

Overhaul or repair

 

Depot or Works Repairs

ATR r Awaiting test run

BCL Bogie cleaning, other than at

scheduled exam

BEX Boiler examination by inspector

BWO Boiler washout, other than at

scheduled exam

COL Inspection or repairs following

collision

DRL Inspection or repairs following

derailment

DWT Inspection or repairs following

dewirement

FTL Inspection or repairs following

fatality

OAX Inspection or repairs following

other mishap

VNR Inspection or repairs following

vandalism

LBT Load bank test

OCR Lubricating oil change

PCD Pantograph head or carbon damage

PHC Pantograph head change, normal wear

SPT r Special tests

TST r Test run (non-revenue) after repair

DEC r Waiting shopping decisions (to be

made by EXPTIM)

BBL m Brake blocking

UAT m Ultrasonic axle testing

WTR m Tyre turning

XXX w Only to be used when no work done.

11

 

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2.3 Withdrawals

 

Code Description

 

ONE m Wear and tear

Two m Damage

FRE m Fire

FOR m Written off

FYV m Transferred to service department use.

 

3.  Components

 

Codes in this section can be used as REASOS

Or WKDONE except those marked :

 

r which may only be used as REASOS

w which may only be used as WKDONE

 

Code Description

 

Engine

 

100 Repairs to engines

110 Crankcase, block, crankshaft and

sump

111 Cylinder liners and seals

112 Pistons, piston rings, gudgeon pins

and connecting rods

120 Cylinder heads, including gaskets

and seals

121 Valves and rocker gear

123 Cams, camshafts and timing gear

130 Inlet systems, including gaskets

and air filters

131 Exhaust system, including gaskets

132 Pressure/turbocharger

140 Speed control valves, throttle motors

etc, including pipework, linkage etc

141 Governor and fuel pump linkage,

including drive

142 Overspeed and underspeed units

150 Fuel pumps

151 Injectors, including combined

pump/injectors

152 HP fuel pipes

160 LP fuel system, tank and valves

161 Fuel hoses, pipes and joints

162 Fuel gauges

163 Fuel filters and strainers

170 Lubricating oil system components

171 Lubricating oil pipework, joints and

hoses

172 r Low or contaminated oil

173 r Low oil pressure

174 Lubricating oil filter and strainers

180 Radiator panels, shutter and fan

181 Heat Exchanger for lubricating oil

182 Charge air intercooler

12

 

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Code Description

 

183 Engine driven coolant pumps

184 Coolant pipework, valves and joints

185 Coolant hoses, flexible pipes and

clips

186 r Low or contaminated coolant

187 r Low coolant pressure, overheating

190 Hydrostatic pipework

191 Hydrostatic control pump and motor

 

Mechanical and Hydraulic Transmission

 

200 Mechanical and hydraulic transmission

210 Hydraulic transmission torque

converters

220 Mechanical drive shafts and couplings

230 Mechanical change speed gearboxes

240 Intermediate and final drive gearboxes

250 Fluid couplings

251 Free wheels

260 Auxiliary drives and drive units

261 Belt drives

270 Cranks and side rods

 

Brakes

 

300 Braking system

310 Air brake system pipework, reservoirs,

auto-drain valves and safety valves

311 Air brake hoses

312 Air brake controllers and drivers

brake valves, including feed valves,

isolating cocks etc.

313 Triple valves and distributors

314 Application and holding valves,

including associated contactors

315 EP and electronic brake control

equipment

316 Air brake cylinders including

automatic slack adjusters

317 Other air brake components

318 Wheelslide protection

320 Vacuum brake system pipework and

reservoirs

321 Vacuum brake hoses

322 Vacuum brake controllers and brake

valves

323 Combined vacuum/air valve

324 Vacuum brake cylinder

325 Other vacuum brake components

330 Drivers safety device, vigilance

control

340 Gauges, air and vacuum

350 Rigging, including brakeblocks and

disc pads

13

 

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Code Description

 

351 Parking brake

360 Interface equipment with dynamic

brake

370 Filter, strainers, dirt collectors,

including those combined with

check valves

390 AWS equipment

391 Tripcock

392 AWS wrong side failure tested, no

fault found

399 w Brake defect – reason not ascertained.

 

Machines

 

400 Machines

410 Main generator or alternator

411 Main generator flashover

412 Booster set

420 Traction motors (except when

identifiable within codes 421-424).

421 Traction motor flashover

422 Traction motor armature, including

bearings

423 Traction motor carcase fields and

wiring

424 Traction motor suspension bearings,

gears, gearcases and flexible

drives.

430 Exhauster

435 Main or auxiliary compressor

440 Engine or axle driven generators and

exciters

441 Motor generator sets, convertors

(not AWS) and exciters

442 Train heating generator or

alternator

450 Blower, cooling and radiator fan

sets

460 Combined/triple pump sets

 

Electrical Power and Control Equipment

 

500 Electrical power and control equipment

510 Batteries - repairs or renewal

511 Batteries - recharged from flat

512 Battery charger

513 Automatic voltage regulator - all

types

520 Power contractors, including TM

weak field (except interlocks and

EP valves)

14

 

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Code Description

 

521 Auxiliary contactors, including

other field contactors (except

interlocks and EP valves).

522 Camshafts, camgroups and drum

switches (except interlocks and

EP valves).

523 Reversers (except interlocks and

EP valves)

524 Control relays

525 Interlocks, including those on

contactors and camshafts etc

526 Protection relays (excluding

correct operation due to fault)

527 Master controllers

528 Pressure switches, including air and

vacuum governors

529 Fuses and MCB's

530 Switches and pushbuttons

531 Wheelspin/Wheelslip control system

532 Slow speed control system

533 Warning lights or flags and

instruments (except speedometer and

brake gauges)

534 Other low tension control equipment

535 Resistors - main starting, tapping

and braking

536 Resistors - auxiliary and control

537 Potentiometers

538 Load regulator - electro-mechanical

only

550 Main rectifier/thyristors

551 Main rectifier cooling system

552 Rectifier auxiliaries (excluding

machines)

553 Auxiliary rectifiers and transformers

554 Surge suppression equipment

555 Main smoothing chokes

560 Power cables and connections

561 Control cables and connections

562 Jumper cables, plugs and

receptacles (except for electric

train heating)

563 Conduit, cable ducts, connection

boxes

570 Control air system

571 EP valves (excluding brake valves)

580 Load regulator - electronic only

581 Other electronic equipment

590 Lighting

599 w Loss of power - reason not

ascertained.

15

 

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Code Description

 

Body, Bogie and Underframe

 

600 Body, bogies and underframes

610 Axleboxes, including hot axle

journals

612 Wheels, tyres and axles

614 Frames, including centre castings,

safety brackets, bolster plank and

swing links

616 Springs and hangers

617 Dampers

618 Earthing leads, bonds and brushes

619 Air Suspension (inc bags,

reservoirs, valves, etc).

620 w Rough riding, reason not ascertained

630 Sanding equipment

650 Body framing and panelling, including

roof

651 Bodyside filters

652 Doors and locks

653 Route/destination indicator

654 Whistles, horns and associated

valves

655 Windows

656 Window wipers and washers

657 Bells and intercom systems

670 Buffing and drawgear

680 Speedometer equipment

690 Other body fittings

 

Emergency and Fire Protection Equipment

 

700 Emergency and fire protection

equipment

710 Emergency equipment

720 Fire protection equipment

 

Heating Equipment

 

800 Heating system

810 Boiler - Clayton - Steam/water/fuel

equipment

811 Boiler - Clayton - electric equipment

812 Boiler - Spanner - Steam/water/fuel

equipment

813 Boiler - Spanner - electrical

equipment

814 Boiler – Stone Vapor – Steam/water/fuel equipment

815 Boiler – Stone Vapor – electrical equipment

816 Other steam heating fittings

820 ETH jumper plugs, receptacles and cacles

821 Boiler ETH control gear

16

 

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Code Description

 

840 Cab heating, including demisters

and air conditioning

899 w Loss of heating - reason not

ascertained

 

Supply Equipment (Electric Locos)

 

900 Supply equipment electric stock

only

910 Pantograph

911 Other roof mounted equipment

920 Shoegear

921 Power and shoe fuses, including

traction power isolating switches,

links and fuseboxes

930 Air blast or vacuum circuit breaker

940 High tension cable and sealing ends

950 Voltage detection, selection and

changeover gear

960 Automatic power control equipment

970 Main transformer, including oil

radiator and pipework

17

 

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TRAIN HEAT CODES (TNHEAT)

 

Code Description

 

O Not fitted for train heating

A Steam : Spanner boiler MK I

B Steam : Clayton boiler

C Steam : Stones boiler

D Steam : Spanner boiler MK III

* E ETH : DC, 800 volts or over

F ETH : AC, may by used to heat any

Stock except SR MK I stock

G ETH : AC, may be used to heat any

Stock except SR MK I, BR air-cond

MK 2D, 2E, 2F & 3A stock

1 H ETH : DC, below 800 volts

1 J Dual : Spanner boiler MK II + DC,

below 800 volts

1 K Dual : Spanner boiler MK III + DC,

below 800 volts

* L Dual : Spanner boiler MK I + DC,

800 volts or over

* M Dual : Spanner boiler MK III + DC,

800 volts or over.

* N Dual : Stones boiler MK III + DC,

800 volts or over

P ETH : DC, 750 volts, may only be used

to heat MK I (inc SR) & MK 2A,

2B, & 2C stock.

R ETH : As P, but with interlock cut-

out switch, currently being converted

to type P.

X Steam : Boiler isolated.

* Y Dual : Boiler isolated + DC, 800

volts or over

Z Dual : Boiler isolated + DC, under

800 volts.

 

* May be used to heat any ETH stock

except SR MK I and LMR Pullman stock

 

1 May be used to heat any ETH stock

except SR MK I, LMR Pullman , LMR

MK 2D and all MK 2E stock.

 

Note

 

1 LMR Pullman stock accepts only AC ETH

2 SR MK I stock heaters cannot accept

over 750 volts

3 LMR MK 2D and all MK 2E stock have

MA sets which overheat if the voltage

Falls below 800 volts.

4 MA sets on air-conditioned stock are

liable to heavy flashover if

supplied from class 81-85 locos.

18

 

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BRAKE CODES (LOCOMOTIVES)

 

Train Brake (TRNBKE.)

 

Code Description

 

A Equipped for braking Air Braked

Trains only

O Not fitted for train braking

V Equipped for braking Vacuum Braked

Trains only

X Equipped for braking both Air and

Vacuum braked trains

 

Locomotive Brake (LOCBKE)

 

Code Description

 

A Straight air brake only

G Fitted with Emergency Application

valve for Guards use when working

in multiple

H Fitted with Rheostatic brake

P Fitted with Electro Pneumatic

Control

Q Fitted with EQ brake

R Fitted with Rheostatic and

Regenerating brakes

T Fitted with both EQ and modified

Proportionality

V Fitted with modified proportionality

(also known as modified triple

valve)

 

MULTIPLE CONTROL CODES

 

Code Description

 

O Not fitted with multiple control

1 Blue Star

2 Orange square

4 Red Circle

8 A.C. Electric locomotives

9 Class 56 locomotives

19

 

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REGIONAL CODES (REGCDE)

 

Code Description

 

1 Eastern Region

2 London Midland Region

3 Scottish Region

4 Southern Region

5 Western Region

9 BRB HQ & Miscellaneous

SPECIAL CHARACTERISTICS CODES (SPLCHA)

 

Code Description

 

CF Fitted with tablet catchers

FA Fitted with separate boiler fuel

Tank (100 galls)

FB Fitted with separate boiler fuel

Tank (120 galls)

FC Fitted with separate boiler fuel

Tank (200 galls)

FX Extra fuel capacity

GG To Burry Port & Gwendraeth Valley

Loading gauge

SS Fitted with slow speed control

WQ Fitted with bells and flashing

Headlights for working on

Weymouth Quay.

 

RADIO TELEPHONE CODES (RADTEL)

 

Code Description

 

0 Not fitted with Radio or Telephone

1 Shunting locomotive fitted with

control tower or other point in yard.

2 Main line locomotive fitted with

train telephone to communicate with

guard of passenger train.

4 Class 26 locomotives fitted with

radio for operating in north of

Scotland .

20

 

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Special Reminder for Depot Staff

 

TOPS can only work successfully if the latest

information on every locomotive is reported

promptly and accurately every time change occur.

 

Here are just a few examples of the sort of

information which must be reported:

 

To your local AFC:

 

(a)  Locomotives arriving on your depot

(b)  Locomotives leaving your depot

(c)  Locomotives fulled at your depot

(d)  Locomotives given as `A` Exam at your depot

(unless local arrangements require direct input – see below)

 

To your local AFC or direct to TOPS if you have your own online terminal:

(a)  Locomotives receiving major examination and/or repair at your depot.

(b)  Changes in the Operating Status/Regular Maintenance?Reason out of service codes applied to a locomotive at your depot.

(c)  Updates to times that unserviceable locomotives are again expected serviceable.

(d)  Locomotives released from maintenance/repair with coded details of the significant work done.