TC Factory Service Bulletins – Lost Information Found
Part I: Index, Service Information Sheets, All Models
Part II: Select, Service Information Sheets, TC
As with any production item, there are occasions when the manufacturer discovers the need to make a product improvement change for safety or reliability. The “MG Car Company, Ltd” was no exception, as it issued numerous changes which were called “Service Information Sheets”.
The Service Information Sheets (SIS) began in the early 1930’s for all models and continued throughout until 1950. The SIS were compiled into a single book for all models and used primarily as a dealer reference as a prelude to what we know today as service bulletins and product recalls. Service Information Sheet #1 was titled “Sparking Plug Gap” and was issued for “All Models”. The last was SIS #77, “Rear Engine Mounting” issued for the MG Y.
For the TC, there are many SIS embedded within the total collection as summarized in the Index. The information sheets are somewhat fun to read as they are a technical time capsule of the day. The sheets were very brief, sometimes only a couple of short paragraphs and an occasional picture. There are a few issues that have information that has been lost or forgotten over the years. One such issue is No. 45, “Locking Plates for Steering Arm Bolts”. This issue talks about a locking tab that is no longer available from today’s major suppliers. FTFU has remanufactured them to make them once again available. (Catalog Item #FA019, 16-Front Axle, Locktab)
A summary of those issues which would be of interest to a TC owner include the following:
No. 42 – Valve return springs No. 45 – Locking plates for steering arm bolts
No. 46 – Removal of sump
No. 49 – Adjustment of engine mounting
No. 52 – Safe limit for re-boring
No. 59 – Lubrication of the King Pins
No. 60 – Method of clamping rear hub ball race
No. 61 – Steering angles
N0. 64 – Front wheel toe in
No. 67 – Speedometer cable
No. 68 – Master Cylinder
No. 69 – Distributor shaft
No. 70 – Sump joints
No. 73 – Castor Shims
No. 76 – Dash pots
For those that are planning to work on the particular systems mentioned above it may be worth a look to make sure that your repair is in concert with factory recommendations.
Part I: Index, Service Information Sheets, All Models
Part II: Select, Service Information Sheets, TC