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- Replacing the tachometer
(by John)
This job is simple. It is quite amazing, how well designed the instrument assembly is. Ever messed with PC's?.. well, if you've ever used 'Plug & Play' cards in your PC - this is just the same principle (except it works every time!!)
First, you need to gain access to the instruments.
-
Remove the fascia centre grille
- Remove the fascia instrument cowl
- Remove the plastic lens (3 screws at top & slide lens upwards)
After sliding the plastic lens off, remove the black dial mask. To remove the tachometer you must now unscrew the 3 retaining screws that hold the dial in place. These are described in the workshop manual as 'Pozidriv' screws... but they are wierd indeed. I managed to get them loose with a fine tipped flat head screwdriver.
Above:
3 Pozidriv screws hold the dial tight in place
Below: Close up of screw.
Once you have removed the 3 retaining screws you just pull the dial out - like taking a 3 pin plug out of an electrical socket! It really is that easy. The TR7 speedo is electrically controlled - so no cables are attached, making the replacement so simple.
To fit your new dial, just plug it in, fit & tighten the 3 retaining screws and then refit the lens, instrument cowl & fascia grille. As they say round where I live... "Wee buns!"
Pic showing simple 'Plug & Play' 3 pin fitting. Note the 3 holes
on the instrument panel - why can't all things be this well thought out?
Costs: I bought a complete instrument panel (lens & instrument panel including ALL dials & lights in fully working order) off eBay for just £20. The specialist suppliers sell all these dials separately but at this price, it's nice to have a full backup set of instruments and warning lights.
This is the only instrument I've had to replace so far - but the principle looks to be the same for all the other electrically controlled dials - with the exception of the speedo & clock which both have cables attached to their backs.
