Tach gear replacement

[Ted337]

Is it possible to remove the tach gear from the end of the camshaft on one motor and install it in another?
Or is it pressed in and impossible to get out?
I have tried so I know it will not come out easy.

Thanks, Ted

[jtrichard]

I assume you are talking about your 450C? (you should state these things) parts book shows tach drive gear as a separate part from cam shaft

[Ted337]

Yes it is on my 450c dozer, sorry I didn't put that in.

I saw that it is a separate part ($135.00) but I can't figure out how to remove it. Seems like like it is pressed in.

[jtrichard]

looking at parts book it could be threaded or pressed in .... if threaded it may be LEFT HAND thread

[Ted337]

Looking at the one I was going to install it in there aren't any threads. So I'm pretty sure it is pressed in some how.
What I was kinda looking for is if anyone had been able to remove one successfully.
I tried locking on to it with vise grips and tapping it with a hammer but I didn't want to go to hard if it is just not going to come out.

Thanks

[amos]

on my 450C the gear was bad and instead of tearing it down to replace the gear a simpler (cheaper) solution was to adjust throttle cable so that max throttle position is at 2000 rpm(or 1800 if you're more comfortable with that). You can rent a digital tack and using whiteout or chalk to make a reference mark on the front lower pulley you can get an accurate reading during set-up.
Gear appears to be a press fit:in a few hours I'll be at office and see if my manuals have a better description and let you know what I find.

[pondhogvt]

Ted, I recently rebuilt my 450c motor but the kit did not include the tach gear..

the gear is press fit onto the camshaft but is also splined... I tried everything,,, I have good OTC bearing pullers.. we put one on and put it in a press and could not get out the gear.. I then heated camshaft end red hot as I had a new cam anyway and still could not get it out.. I ended up slicing end of cam with torch to get gear out,,,,,,,,

only to find the new cam did not have that splined end.. so no tach...

I hope you have better luck then I did... Mark.

[NWJD fan]

If having a functioning tach is your only concern there are some other options. Check out Tiny Tach online. It is a digital unit that senses fuel pressure pulses in one of your injector lines and creates a tach signal. Around $200.00 and non invasive. There are some other electric diesel tach options available as well.

[Ted337]

Yep the old one would not come out. Ended up putting in a new one.