speedo disassembly

need some help. the speedo/odo unit is out of its housing and i've removed the 3 screws on the back. it will not come further apart and i'm not going to try any force. what do i need to do to detach the 2 units from each other? it seems like its hung on the speedo needle shaft. thanks, jon s

 

thanks. the chrome ring and cover are off. does the speedo needle just pull off the shaft?

 

gentleman: thank you both. i don't think i explained what i did well enough. the unit is completely out of the housing. i looked up rjay"s 2006 thread on speedo calibration, circuit descriptions etc. he shows a picture of the speedo face still on a part of the unit which has been taken apart into the drive motor, the odometer housing, speeedo drive and circuit board. i wanted to take the unit apart so i can see if i have broken gears in the non resettable odometer wheels. my problem is not how to get the unit out of the housing - it came out fairly easily after i removed the chrome ring and cap on the back. on the other hand since i know that the odometer is jumping up by thousands of miles randomly should i just assume that i've got broken plastic parts and ship it for repair? thanks, jon s

 

thank you very much. i'll do that very thing. if the sprockets/wheels behave normally is there a reason why the hundreds and thousands wheels should jump randomaly?

 

by the way, i disassembled all the gauge faces (horrible job) so i could repaint the needles . i extended the white with flat paint 1/2 way up the needles. it preserves the original look but now at the sad age of 68 can see the needles easily in bright light or at night.

 

crowndog: the unit has clearly been taken apart before. it has worked fine for about 7k miles until it started jumping last fall. jon s

 

the joy of getting older, sometimes upright seems to be the remaining good part. anyway, even with dim night lighting the increased amount of white on the needles really helps and like i said it still preserves the original look. try a drawing with paint before you make the leap. and yes even with the brightest bulbs the tach lighting is horrible. fortunately the oil pres etc gauges improve dramatically with longer white strips on the needles. regards, jon s

 

i can rotate the 1 thousand and 10 thousand wheels back ward one numeral; ie 69,nnn back to 58,nnn which is probably the right mileage. i assume i have broken teeth on those wheels. yes? thanks.

 

thanks adrian. would the usual speedo shops have repair parts or do i have to swap wheels from the trip odo? jon s

 

i could reset the odo to zero and it won't hit 59k again until long after i'm dead but i guess i'll contact one of the speedo shops and send it for repair. taking the wheel sets out and apart is probably deeper than i want go especially since it seems clear i'll need replacement parts. i would guess that the tooth pattern is the same for all wheels since there's no reason to have different sets for the 2 odos. thanks again for your advice. jon s

 

talked to north hollywood speedo today. they have replacement odo wheel sets and will replace the odo wheel set, reset to specified mileage and offer continuing service for around $190. it's a no brainer. take a look at their web set - they do the new guage faces with a litho process in house - very nice