Thank you Steve for the helpful information on speedo troubleshooting,
proper lube procedure and repair.
Gary P.
Wobbly needle is sometimes caused by the speedo cable. If
there is a kink in the inner member, or both the inner and outer members, the
inner moving inside the outer acts kind of like a cam, as the inner and outer
kinks align, the cable is relaxed. Then as the inner encounters
interference with the outer (housing), it slows just a it and causes the needle
to drop. This is exacerbated by the spiral wound inner and outer speedo
members.
--
Try removing the inner member and wipe it down good. Inspect the
inner member for any signs of wear or shiny spots. If wear looks significant,
replace the inner member. Most auto stores have kits for under 20 bucks on the
"Help" rack. If there is not significant wear, hold it by the tip, letting it
hang. Look for any kinks along the length. Gently straighten any
kinks until the inner hangs freely and fairly straight. Pay particular attention
to the ends. You can roll the cable on a flat surface and see how straight the
ends look. Visually inspect the outer member to ensure there are no sharp
kinks or bends. Gently straighten any kinks. Try to keep all radii
as broad as possible.
Lightly lubricate the inner member with white lube or another suitable
grease, to about a foot from the top. Wipe the inside of the inner ferrule clean
and gently slide the inner member back in. You may have to rotate the inner
member slightly to align it so it mates with the speedometer pinion.
Reassemble and test drive. If this doesn't solve your problem, you may have
speedo head issues.
I have never used them myself and have no connection but have heard good
things about Bob's Speedometer in Howell, MI.
www.bobsspeedometer.com
Steve Charette
On Tuesday, February 6, 2018 at 1:04:41 AM UTC-5, MO wrote:
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