Tachometer and Speedometer Repair

[woodland_builders]

Gary,
Thanks for the information.
Just did belts, hoses, filters and fluids about a month ago, but the
tach was not high on the priority list. I guess I will get another
look at the Cat from the front side.
Gene Chaude
77 FC33
Connecticut
--- In WanderlodgeForum@yahoogroups.com, "Gary Miller"
wrote:
> Gene,
>
> The tach sending unit is on the front of the CAT in the area behind
> the engine fan mounting bracket. It comes off the front of the
> engine and makes an immediate turn toward the roadside. Two bolts
> holt it to the front of the engine.
>
> The unit is a combination direct drive and electronic drive type
and
> contains some nylon gears at the right angle with a couple drive
> tines on each side and some magnetic pickups I think.
>
> On mine, I took it apart, cleaned and lubed it with speedometer
cable
> graphite and it began working again. Problem was, on the end of it
> where a cable would be attached, there was a rubber cap which had
> long ago crumbled away leaving the end exposed and open. After
> reviving mine I found a new cap for it (NAPA #660-1696).
>
> Removing it is a tedious job best done with the fan off, and be
> careful not to force it. Taking the whole unit off at the block is
> the best way since getting wrenches in there at angles to take
parts
> of it off may snap something off. As an alternative, try to keep
> working some lubricant into the end of it and see how it goes over
> time with that new rubber cap. And look for broken wires. The
> electronic tach has adjustment screws recessed into the back of it.
>
> Haven't had my speedo apart, but did replace the sending unit at
the
> rear curbside wheel after some road debri pulled out the wires. On
> your year, I believe the pickup is on the driveshaft.
>
> Gary Miller
> 83 FC 33
> Wauwatosa, WI
>
> --- In WanderlodgeForum@yahoogroups.com, "woodland_builders"
> wrote:
> > Hello all, it is great to see the new group on track and doing
> well. I
> > would like to go after the broken Tachometer and Speedometer on
my
> 77
> > FC Diesel. Has anyone been down this road? Where is the pick up
on
> the
> > engine for the tach? I do not have a book that covers a test
> procedure.
> > Does anyone know of one? My tach in the coach is electronic. I
had
> a
> > 3208 in a truck awhile back that was mechanical which makes me
> question
> > if the current tack is OEM. Are parts still available? The
> speedometer
> > runs up to about 35 mph and then stays there reguardless of
higher
> > speed. I think the internal weights may be restricted. Does the
> guage
> > come apart and has anyone been in there? Thanks Gene
> >
> > Gene Chaude
> > 77 FC33
> > Connecticut