Triumph Factory Service Bulletins
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.
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
- 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
- Sports/4/E April 1954 Deals with accidental engagement
of reverse gear
- Sports/5/E October 1954 revisits water getting into
- Sports/1/F May 1954 Deals with rear hubs working loose
- Sports/2/F June 1954 Deals with upgrade to rear crown
- 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
- 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
- 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 changes made.
- Sports/2/L May 1954 Lug nuts being commonly over torqued.
Introduction of stronger larger lug nut Starting commission
- Sports/2/M February 1954 Flasher units reoriented from
horizontal to vertical because of failures in horizontal
- Sports/3/M June 1954 Wiper spindle attachments moved
- 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
- Sports/3/N December 1954 Battery drain tune added
starting commission TS3288 Drawings show proper routing of
- 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 muffler.
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
- 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
- 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
- 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
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 modified.
This 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 fluid reservoir.
- 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
- VANGUARD III/5/B March 1956 Rear generator mount
strengthened starting TS10345E
- 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
- 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
- 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 place.
- 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
- 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
- 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
- SPORTS/17/R October/November 1958 (Girling Service
Bulletin 491.T.103) Illustrated instructions for rebuilding
a Girling master cylinder used in a TR3.
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
- 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 winder linkage
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
- 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 circuit
- 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 for
- 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
- T-65-41 September 30, 1965 How to align rear wheels on
a TR4A IRS