Thanks Randall,
Agree with your GTR104 being best # to go with for modern TR4 Temp
Transmitters.
FYI: Searched through the Standard-Triumph Service Bulletins and found 2
interesting temp transmitter notices:
1.
BULLETIN T-65-48
ALL TRIUMPH DEALERS - WESTERN ZONE
SERVICE DEPARTMENT
HIGH READING TEMPERATURE - TR4A
DECEMBER 16, 1965
This bulletin is issued to avoid unnecessary investigation on your
behalf.
Reports of overheating have been received and the following information
will assist in rectification.
In the event of abnormally high readings being obtained on the
temperature gauge on Triumph TR-4A cars from CTC-53000, a correction
can usually be made by substituting the existing temperature
transmitter bulb with transmitter bulb bearing the Smiths part No. TT
3802/00, Triumph part No. 131062. This transmitter, which was used on
the Triumph TR-4 models, is at present identified by a red plastic
insulator.
Should you come across any Triumph TR-4A cars fitted with the Smiths
temperature gauge that is calibrated 30-70-100 as distinct from the
current specification which is merely face marked C-H, the Smiths
bellows type of thermostat should be used or a 70 degree C waxed type
of Weston Thompson thermostat in the event of a high reading complaint
being involved.
2.
BULLETIN T-64-38
ALL TRIUMPH DEALERS - WESTERN ZONE
SERVICE DEPARTMENT
TRIUMPH SPITFIRE TEMPERATURE
NOVEMBER 25, 1964
GAUGE TRANSMITTER
For complaints of low or nil temperature reading on the Triumph Spitfire,
the transmitter should immediately be suspected, as faults in manufacture
have been found.
Each transmitter is date coded in addition to the Smiths part number and
codes 5/4, 6/4 and 7/4 (May, June and July 1964) are particularly suspect.
Date codes before and after should be satisfactory.
There is also the possibility that another range of transmitter may have
been fitted in error, which will also result in a false instrument reading.
In addition to part numbers, identification of the correct transmitter can
also be made by the color of the plastic mould securing the Lukar clip
which should be Maroon.
Parts numbers for the Spitfire and other models on the Smith Temperature
Transmitter are as follows:
Model Smith's Code STMCI Part
No. Volts
Spitfire (up to FC 26303) 4801/00 137386
10
Spitfire (FC26303 onward) 4802/00 137705 10
Triumph 1200 4800/00 121997
12
TR4 (Concave Glass) 3802/00 131062
10
TR4 (Flat Glass) 3804/00 134435
10
Sports Six 4800/00 137386
10
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