Hourmeter repair 8t

Here's the list of Hour (Service) meter part numbers...

Hi,
the counter will come out after some flushing to remove some of the crud after you have removed the end cap--yes, it will come out by gentle tapping down on a piece of wood.

To remove the input drive assembly you simply gently grip the extension in vice soft jaws and whilst rotating back and forth and pulling the main housing away from the extension housing you should be able to work it out--they are a light press fit.

Then you can replace the lip seal in the extension housing--note which way the lip faces-- into the said housing-- to keep the engine oil in the pump drive area.
Also note there is a drain hole just behind the seal and this must face downwards to drain lube oil stopped by the seal.

All this is in the D4600, D4400 etc and the D318/5 etc. Servicemen's Reference Books with pictures that maybe someone can help out with.
Cheers,
Eddie B.

Just because it fits doesn't mean much with an hour meter. Totally diffrent counter inside. Tried to use 466 housing with the good glass and cover. That didn't work either. Slight difference in the 318 housing to accommodate the larger gear on the counter. Glass is held in by a lead seal. Cap, spring and glass moved to the 318 housing. Cleaned up 318 counter, reinstalled, and good to go again.

Does anyone know if the main gear can be replaced and are they available anyplace? The meter on my D47U does not work because the gear is worn. It has been some time since I last had it out but I believe it was a brass gear. I could turn it by hand and the meter worked fine but not while in the machine. Most likely a common problem. May be able to get someone to make one.

Bruce

Get your p/n and look at machinery trader.com , parts search. Enter the p/n. On my machine 1f3221 , 3 were available at Florin Tractor in Sacramento. But usually when a driven gear gets ate up, there is a problem with the drive gear also.

Thank you oldbeek for that info. I had wondered about the drive gear also. Have never seen one to get an idea what it was made of, or the amount of wear they may get on them also. Appreciate the reply.

Bruce

[quote="blwatson"]Thank you oldbeek for that info. I had wondered about the drive gear also. Have never seen one to get an idea what it was made of, or the amount of wear they may get on them also. Appreciate the reply.

Bruce[/quote]. My drive gear has no wear at all in 16,000 hrs. The tiny worm screw that is on the other end and contacts the counter gear does have some wear in the center, but no telling how long the glass and cap have been missing. Water and sand= lapping compound.

Thanks again oldbeek, It has been several years since I had the meter out and last looked at it. The cat and my manuals are about a two hour drive away. Next time I get there I will take another look and get the part number. I am guessing that the gears are pressed on but not certain. Will find out when I get a chance to pull the meter again. The glass and all are in good shape, just the worn gear.

Bruce

Gear is retained by a pin. Thinking of why gear may be shot. The military version of the 302 GMC (Duce and a half) had a drive gear on the camshaft that was slightly different than the civilian cam. Put a stock distributor in a military 302 to get rid of the monster waterproof distributor and the driven gear would be eaten up. It was a way to keep surplus military equipment from flooding the civilian market after WW2. The gear off of the military distributor had to be used on the stock distributor. To the eye, they were identical. There were many subtle changes on military vehicles that didn't match the civilian market.