Re: WA fb special
Posted: Wed Jan 12, 2022 3:57 pm
Speedometers tend to seize up, then the cable shears off.
Pull the speedo out, then try to turn the little bronze bit where the cable goes in at the back. It should rotate freely. If it's sticky, or won't turn, you've found the problem. Fixing it's not too hard -
Remove the bezel and front glass (you'll need a narrow screwdriver to bend up the bezel where it's folded over onto the body).
Undo the two big screws holding the case onto the movement and remove the movement.
If the rubber washer's come out with the movement, peel it off.
Right where the case goes on, you'll see a little (~3 mm) welch plug. Pull it out with a dental pick or O-ring tool.
Underneath is a felt wick. Pull it out too.
Now go to work with WD-40 in the hole. It may take a few hours to get get the gummed-up oil out of the bearing, but be patient. Once the shaft turns freely, put a couple of drops of non-gumming oil into the hole, wash and dry the felt, oil and install it, then the plug.
Reassemble the speedo.
Then inspect the inner cable. Make certain it engages properly in the back of the speedo, and also into the driven gear.
Rob
Pull the speedo out, then try to turn the little bronze bit where the cable goes in at the back. It should rotate freely. If it's sticky, or won't turn, you've found the problem. Fixing it's not too hard -
Remove the bezel and front glass (you'll need a narrow screwdriver to bend up the bezel where it's folded over onto the body).
Undo the two big screws holding the case onto the movement and remove the movement.
If the rubber washer's come out with the movement, peel it off.
Right where the case goes on, you'll see a little (~3 mm) welch plug. Pull it out with a dental pick or O-ring tool.
Underneath is a felt wick. Pull it out too.
Now go to work with WD-40 in the hole. It may take a few hours to get get the gummed-up oil out of the bearing, but be patient. Once the shaft turns freely, put a couple of drops of non-gumming oil into the hole, wash and dry the felt, oil and install it, then the plug.
Reassemble the speedo.
Then inspect the inner cable. Make certain it engages properly in the back of the speedo, and also into the driven gear.
Rob