Triumph Factory Service Bulletins
I have some copies of Triumph service bulletins in PDF form. I
got them from someone else years ago (To open
a PDF file is to download it to your computer). I'm
sorry I have no idea who to credit for the hard work of scanning
the bulletins and converting them to PDF files. There
was a lot of hard work there. After some soul searching
and unsuccessfully looking for the site that I got my copies
from I've decided to go ahead and make my copies available. There
is stuff in the service bulletins that are unavailable anywhere
else. Some of which, like the proper way to adjust front wheel
bearings on disk brake TRs are important safety information that
should be widely available.
Note: in early 2007 I was informed that the original service
bulletins belong to Joe Curry, Michael Porter did all the hard
work of scanning them into pdf format and that they were first
posted to the new by Dan Buettner. Thanks folks for the
hard work and making these documents available to all who need
Service bulletins, of course are packets of information sent
from the factory to authorized Triumph dealers that affect servicing
of Triumphs. They were considered company confidential
and much of this information never made it to the factory workshop
manual. Each of these PDF files contain all the bulletins
for that year. I've described most of the individual bulletins
that pertain to Triumph TR2-4A only. Now, you can
amaze your friends on Triumph email lists by quoting service
bulletin numbers and dates when backing up your facts during
email discussions. At the bottom of the page I have placed a copy of an email from Gary Grant explaining the Triumph service bulletin numbering system in case you are interested.
1954 Service Bulletins (Shows
why it is often not good
idea to buy the first year of a new model)
- Eight/2/M January 1954 deals with noise suppressors to meet
new regulations regarding radio interference.
- Eight /4/M January 1954 Provides list of new fire resistant
adhesives approved for use by service departments
- Sports/3/A July 1954 Provides updated list of TR2 torque
specs. Note this a a very comprehensive list of torque
- Sports/1/B April 1954 Deals with high tach failure
rates and specify's a way to route the tach cable.
- Sports/2/B April 1954 Crank case breather throws too
much oil at sustained high revs. Modified crank case breather
fitted starting engine TS972E
- Sports/5/B November 1954 Provides extensive list of engine
part dimensions and clearances.
- Sports/6/B December 1954 Pistons extensively used in
rally work cracking crowns. The piston design was modified
to add webbing at the crown. The new piston was folded
into production with engine TS4882E.
- Sports/1C June 1955 Original TR2 thermostat housing
and radiator replaced starting commission number TS1201
- Sports/5/B November 1954 Revises routing of the water
temperature sender unit. Illustration show the exact
factory routing generally accepted as correct for all later
TR3 through 3B.
- Sports/1/D June 1954 Switch to up rated clutch shaft pin
starting with commission number TS411
- Sports/1/E March 1954 Sealing overdrive solenoid to
protect from water damage
- Sports/2/E April 1954 Deals with problem of jumping
out of second gear on overrun.
- Sports/3/E April 1954 Deals with jumping out of reverse gear.
- Sports/4/E April 1954 Deals with accidental engagement of
- Sports/5/E October 1954 revisits water getting into overdrive
- Sports/1/F May 1954 Deals with rear hubs working loose under
- Sports/2/F June 1954 Deals with upgrade to rear crown wheel
- Sports/3/F August 1954 Churchill is designing a new tool
for assembly rear hubs.
- Sports/4/F November 1954 High rate of rear bearing failure
due to incorrect assembly
- Sports/5F December 1954 Announces additional changes
to rear crown wheel attachment bolts.
- Sports/1/G May 1954 Announces introduction of front hub upgrade.
- Sports/2/G June 1954 Add an additional steering wheel brace
starting commission number TS1390
- Sports/3/G July 1954 Goes into the correct method for fitting
felt seals to front hubs (drum brake)
- Sports/4/G August 1954 Reports of fractures in trunnion from
incorrect fitting. Goes over proper fitting method.
- Sports/1/J July 1954 Announces availability of skid plate
for rally work. Provides fully dimensioned set of drawings.
- Sports/2/J November 1954 Rear shock mounts break under
competition conditions. Improvements fold into assembly
- Sports/1/L April 1954 Wheels should be balanced whenever
- Sports/2/L May 1954 Lug nuts being commonly over torqued. Introduction
of stronger larger lug nut Starting commission TS1634
- Sports/2/M February 1954 Flasher units reoriented from horizontal
to vertical because of failures in horizontal position.
- Sports/3/M June 1954 Wiper spindle attachments moved starting
- Sport/4/M December 1954 Tach cable is fouling over drive
cable so new clamp added to tach cable to help secure it in
- Sports/2/N October 1954 Sealing stitching to eliminate leaks.
- Sports/3/N December 1954 Battery drain tube added starting
commission TS3288 Drawings show proper routing of drain.
- Sports/1/P August 1954 Proper adjustment and maintenance
of the S.U. H4
- Sports/2/Q November 1954 lists the special tools for
maintenance of a Triumph providing Churchill part numbers.
- Sports/1/R April 1954 New rear brake attachment bolts for
added strength starting commission TS740
- Sports/1/S May 1954 Too many people complained about the
TR having a loud muffler. Resonator added behind
NOTE: My TR3A is fitted with the early TR2 exhaust behind
the 4 tube headers. The sound is noticeable and really nice.
- Sports/3/B June 1954 First TR2 cams flexing a lot. Cam
stiffened starting engine TS1636E. Also push rods shortened
from 10.37 inches to 10.34 inches to compensate for new cam.
1955 Service Bulletins
- Eight/19/N December 1955 Lists manufacturer's paint codes
for paints used on1955 Triumphs
- Eight/10/R August 1955 Don't twist the rubber brake hoses
when installing them
- Sports/7/B June 1955 Use of sealing compound at the joint
between the oil filter flange and cylinder block
- Sorts/8/B June 1955 Mentions the factory got a shipment
of bad cork valve cover gaskets that leak
- Sports/9/B June 1955 Mentions that rocker shaft pedestal
suds have been breaking under race conditions and that the
factory is uprating the studs starting with Engine TS6238E,
- Sports/10/B August 1955 Mentions customer complaints from
engine knocking in the 1500 to 2000 RPM range., how the
knock is cured and that the cure went into production engines
starting with TS7713E
- Sports/11/B September 1955 How to recondition that
camshaft bearing housing in an engine block
- Sports/12/B September 1955 The factory decided to raise oil
pressure to 70 lbs pressure at 2000 RPM, 70 degrees C. Asked
dealer to make that adjustment.
- Sports/13/B December 1955 The factory changed harness specifications
on cylinder head nuts because of reported failures. The
change was rolled into production starting with engine TS8937E
- sports/14/B December 1955, different spark plugs specified
for cars shipped to countries with low octane fuels (these
cars were also factory fitted with 7:1 heads).
- Sports/8/E February 1955 Rubber gearbox grommet up rated
because of damage. Change folder into assembly with car
- Sports/9/E June 1955 Parts changes made to eliminate
gear shift lever rattling noise. Changes folded into
factory assembly starting with car TS2579
- Sports/10/E February 1955. How-to convert a gear box
with early over drive to new overdrive that works in second
and third gears.
- Sports/6/F March 1955 Rear axle seals still leak under racing
conditions. Provides a fix for racers with leaks.
- Sports/7/F September 1955 Strengthened rear axle nuts
allows torque setting to be increased from from 110-120
lb .ft. to 125-140 lb. ft. Change folded into assembly.
line at rear axle TS8039, approx commission # TS7700.
- Sports/8/F September 1955 Blocked rear axle breathers
causing oil to be forced out front pinion seal Suggests breathers
be checked for blockage more frequently.
- Sports/9/F November 1955. leaking rear hub seals continue
to plague thee factory. Rear hubs and seal sizes are
changed. Both changes wee folded into assembly by axle number
TS8801, commission # 8269.
- Sports/5/G March 1955 Additional bracing for steering column.
- Sports/6/G December 1955 Bushings for front suspension bottom
inner fulcrum bearings changed from rubber o Nylon stating
with commission TS9121. This was for increased seal life.
- Sports/1/H February 1955 Rear spring rates altered
to help handling on high speed cornering on rough surfaces. Went
into production starting with commission # TS3175
- Sports/3/J March 1955 strengthened jack introduced, Added
to tool kits starting with commission # TS5469. Jack pint on
car also modified to allow jack to fit.
- Sports/3/L January 1955 maintenance of spoke wheels (Should
be carried out every 5000 miles)
- Sports/4/N January 1955 Additional water seals added
to side doors.
- Sports/2/P February 1955 Some rally cars have had rocks thrown
up break the glass fuel sediment bowl. This service bulletin
provides drawings and dimensions for a self made rock shield
that can be fitted to rally cars.
- Sports/5/R March 1955 Deals with master cylinder
fluid leakage by telling the shops not to overfill he reservoirs
and suggesting that the cap breather holes should be 90 degrees
to the return fluid flow path.
- Sports/6/R March 1955 Original 9 inch brake drums supplied
on rears of TR2 replaced with 10 inch drum. They used
up old stock so the implementation started out in groups: TS5442
toTS5449, TS5454 to TS5465 then TS5481 and newer.
1956 Service Bulletins
- SPORTS/17/B February 1956 Reduces spark gap in factory
recommended Champion L10S spark plugs to 0.025 inches for better
cleaning under long stop and go traffic conditions
- SPORTS/19/B may 1956 New big end rod bearings
designed to better handle competition. The new bearing
was introduced into production with engine TS11427E.
- SPORTS/20/B October 1956 New full flow oil filter introduced
into production starting with engine TS12650E.
- SPORTS/2/H March 1956 Softer front shocks introduced
into production starting at TS10132. Change was to answer
customer complaints. Stiffer front shocks become a dealer option
for competition use.
- SPORTS/3/P February 1956 Modifies accelerator pedal stop
limit arrangement on LHD cars.
- SPORTS/4/P February 1956 Introduces new SU needle into
production starting with engine TS10037E. New needle
slightly richens up low RPM's.
- SPORTS/9/R March 1956 Moved grease nipple on
trunnion to make it easier to get to. Bridge pipe assembly
was introduced with car TS10341
- SPORTS/10/R October 1956 Front disk brakes introduced. NEW
METHOD TO SET FRONT BEARING FREE PLAY
- SPORTS/ 10/R October 1956 Discussed tin can style hydraulic
- SPORTS/ 2/S May 1956 Deals with exhaust pipe vibration
- VANGAURD III/3/B February 1956 strengthened filter to engine
block flange to reduced distortion leakage, starting engine
- VANGUARD III/5/B March 1956 Rear generator mount strengthened
- VANGUARD III/5/B March 1956 modified generator front
mount adjustment. Specified torque setting now 16-18
1957 Service Bulletins
- EIGHT/9/B June 1957 Ignition timing by the trace
- EIGHT/12/B September 1957 Champion changing spark plug numbers: Normal
use L10S becomes L7, race/rally use L11S becomes L5.
- EIGHT/17/E May 1957 Cause for oil entering speedometer
- EIGHT/21/E December 1957 Failure of unidirectional switch
allows overdrive to be engaged in reverse causing overdrive
- SPORTS/25/B September 1957 Redesign of big end rod
bearing to allow more oil flow starting with engine TS20780E
- SPORTS/5/L January 1957 New wire wheel hubs introduced for
TR3s with disk brakes. Adaptor nuts
to be torqued to 65 lbs FT then RETORQUED after about 10 miles
of use. New hubs introduced after TS13000.
- SPORTS/8/N April 1957 New hole added to frame to allow
a socket wrench to be used when R&Ring the rear shocks.
- SPORTS/10/N July 1957 Metal
strap added to inside hard top to help keep the headliner in
- SPORTS/5/P June 1957 Carburettor float support bolt
grommet deteriorates with prolonged contact with some types
of gas. A spare set of four grommets were added to the
tool kit after approx. TS18800.
- SPORTS/11/R September 1957 Restrictor valve added to brake
circuit as cure to loosing brake pressure on disk brake models
after a hard corner. Added on TS20320 and newer.
- SPORTS/12/R December 1957 There is an aftermarket wheel finisher
that may cause damage to disk brake bridge pipe .
- SPORTS/13/R December 1957 Incorrect adjustment of the brake
pedal top stop may cause disk brake binding on cars equipped
with a restrictor.
- Vanguard III/9/B March 1957 1/8th inch dia hole added
to rear camshaft journal to prevent oil build up between rear
of camshaft and plug. Change incorporated starting with engine
- VANGUARD III/2/F & VANGUARD III/2/F January 1957 both
deal with making the washer on the pinion shaft thicker. Flange
nut torque is 85-100 Lbs Ft.
1958 Service bulletins
- SPORTS/16/R May 1958 Provides max tolerances for machining
- SPORTS/17/R October/November 1958 (Girling Service
Bulletin 491.T.103) Illustrated instructions for rebuilding
a Girling master cylinder used in a TR3.
1959 Service bulletins
- T-59-19 New starter motor
1963 Service bulletins (Several
Spitfire & Sports six bulletins)
- T-63-31 April 12 1963, Paint formulas for Triumph Racing
- T-63-48 June 28, 1963, Paint Formulas for: White,
- T-63-49 June 28, 1963 TR4 Sromberg Carburetors
, How to adjust and tune them
- T-63-52 July 19, 1963 TR4 gets larger cooling
fan because of overheating problems in stop & go traffic. Starting
with CT21471E, around car CT2100
- T-63-56 August 22, 1963 Revised Dupont paint
formula for Lichfield Green
- T-63-67 November 1, 1963 TR4 rear suspension change
part numbers. Change stares with CT23383
- T-63-68 November 6, 1963 Smog control component list
for parts to meet upcoming regulations
- T-63-74 December 6 1963 TR4 rear road springs
recambered (required change in frame) starting CT23383
1964 Service bulletins (Includes
a lot of Spitfire and warranty period service notes)
- T-64-3 January 3, 1964 Laycock overdrive, Types A and
D, Fault diagnosis and adjustments
- T-64-11 march 5, 1964 Decodes the new paint and trim
colour coding that will be added to ID tags.
- T-64-63 July 17, 1964 How to retrofit TR4s for wire
wheels. This looks like a reissue of the one for TR3's
with disk brakes.
- T-64-28 September 4, 1964 Appears to be a reissue of
a TR3 note about oil getting into speedometers.
- T-64-29 September 4, 1964. New front springs introduced
that no longer require the spacers.
- T-64-32 September 25, 1964 Some TR4 started solenoids
have become damaged by fuel leakage from rear carb. If this
happens, solenoid should be moved 4 inches to the right of
- T-64-41 December 10, 1964 Fixing stiffness in TR4 window
1965 Service bulletins (Includes
several Spitfire service notes)
- T-65-4 January 14, 1965 Adds more colours to Triumph
colour & trim commission plate code
- T-65-6 January 14, 1965 To avoid clogging SMOG equipment
gauze within flame trap should be cleaned every 6,000 miles
- T-65-7 January 14, 1965 Fault diagnosis in speedometers.
- T-65-9 January 14, 1965 TR4 front suspension spec change. Has
complete parts list when caster changed to 3 degrees.
- T-65-15 April 15, 1965 TR4's converted from positive
to negative earth. Provides instruction on how to make the
- T-65-16 April 15, 1965 maintenance of closed
- T-65-17 April 15, 1965 Proper tyre pressures
for solid axle and swing axle TR4A's
- T-65-19 April 15, 1965 proper way to fold TR4A soft top.
- T-65-21 May 6, 1965 Correct torque for
tightening rear shocks on IRS suspension is 55 lbs ft
- T-65-22 May 6, 1965 Proper lubrication of TR4A steering
- T-65-25 May 13, 1965 Alternate oil filler caps
- T-65-26 May 20 1965 Alerting dealers that 46 IRS TR4As
have been delivered to Hertz Rent A Car
- T-65-29 May 20, 1965 How to convert an IRS TR4A to wire wheels
- T-65-41 September 30, 1965 How to align rear wheels
on a TR4A IRS
From Gary Grant:
This is a very brief history/evolution of the TR Service Bulletins starting in 1954.
Starting in 1954 Standard-Triumph issued the bulletins as Service Information Sheets and the numbering system format was Model/Sequential Number/Group. For example: Sports/16/R was the 16th bulletin issued under the R group (brakes) for the TR2. As the Western Zone distributor for S-T, CAL Sales, Inc. issued their own supplemental bulletins using strictly sequential numbering starting with number one and ending sometime before 1961.
In 1958 S-T changed their numbering of Service Information Sheets to a Group/Sequential Number format. Using my requested bulletins as examples: 3/64 and 3/66 would be the 64th and 66th bulletins issued for group 3 (Rear Axle). The applicable models covered under the SIS would be contained in the sub-title of the bulletin itself.
Starting is 1961, the various Zone offices would receive the Service Information Sheets and re-write them. These were only re-written in the sense that the UK spelling and terms were changed to the more familiar American spellings and terms (i.e.- trunk vs. boot, or color vs. colour). The most common of the issued bulletins used the format of T-61-6, with this example being the 6th bulletin issued in 1961. So far I have identified that at least 3 zones issued these, being the Eastern, Northeastern and Western Zones. There were bulletins issued as S series (sales) or SM series (Service Memo)in addition the T series.
In 1968 the numbering was revised again when Triumph was acquired by British Leyand. This numbering system was slightly modified again in 1970 and was used until the demise of Triumph.
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