Transfer Case Maintenance? 1977 16 HP WH

[Nuguy2 0]

Hello again. New topic for the Nuguy2? I have drained the differential oil and was wondering how to proceed?Light brown oil draining out. Should I flush the gear box with something like kerosene? There is one raised nut on either side of each wheel axle. What are these for? I think I will remove the rear wheels and really clean this area well. Looks like a lot of oil/dirt mixture cack there and most likely needs cleaning. Makes me wonder if something back there was leaking? Oil on the dip stick was down about 1/2. 

Just wondering if I am uncovering oil leaks that could be very costly? I guess I won't know until I get it up and running? Thanks for any and all replies!

[Ed Kennell 40,495]

I assume this is an 8 speed gear drive transmission.   

 

 

IF your transmission shows any sign of water (a tan milky look) or dark thick oil, you should definitely flush it with kerosene or diesel.

Raise the front of the tractor as high as safely possible when draining to get the oil over the center hump to the drain hole.

 

1. Drain the old oil

2. Fill with kero or diesel

3. If it is running, drive it slowly in tight figure 8s using all forward and reverse gears. If it is not running, jack up one wheel and rotate that wheel by hand both directions while using all the gears.  Repeat this with the other wheel raised.  The goal is to rotate and wash all the gears and bearings.

4. Raise the front and drain the kero.  If it is really black and dirty, I would repeat steps 2. and 3. till the kero comes out clean.

5. Then I like to fill with cheap low viscosity motor oil and repeat step 3.

6. Drain the light oil and fill with 90 wt rear oil.

 

BTW, I save the drained kero for washing parts.  And the drained motor oil for rubbing down to preserve the patina on the tins.

 

While each wheel is jacked up, this is a good time to check the axle bearings for movement.  There should be no up/down or front/back movement.   In and out movement is normal up to about 1/16".    The axle seals may leak some of the thin kero.,but should stop with the 90wt oil.  If the bearings check OK and the axle seals do leak oil, the seals can easily be replaced.

 

 

Edited yesterday at 04:34 PM by Ed Kennell

[Ed Kennell 40,495]

1 hour ago, Nuguy2 said:

There is one raised nut on either side of each wheel axle

Is this the set screw in the hub?