Front wheel drive

Just purchased a M-52a2. Runs sweet but front wheels will not pull when needed. Air pressure is 85-105 from dash gauge. I pulled the front drive shaft and the cylinder seems to be engaging as it should but just will not spin the front tires when....say pushing on a tree. While i had the shaft out the front end seems ok. Any ideas? Also will someone clarify for me when the front end should engaged....fwd/revs/both????

When the rears spin, the sprag is a over running clutch, as long as all is rolling, no engagement, when the reads are going faster the the front, the sprag locks in

You can also check the sprags by jacking up one front wheel. It will only roll free in one direction and lock in the oppsite direction depending on if you have trans in neautral/forward gear and the opposite if in reverse. I think I got that right!! The forward sprag is engaged in neutral or any forward gear, with air pressure is built up. In reverse, the reverse sprag in engaged.

got it. some genius had the air lines going to the t-case cylinder backwards.

ChuckM said:

got it. some genius had the air lines going to the t-case cylinder backwards.

Click to expand...

And it still works after switch them back the other way?

You can find the TMs here
UPDATED LIST
-=-=-=-=-=-=-=-=-=-=-=-=-
Technical Manuals - Steel Soldiers::Military Vehicles Supersite
OR
JATONKAM35s HOME ON THE WEB
OR
Free Military Army Manuals!
OR
Former Military Vehicle Owners - Index
OR
ARMY 6X6: SERVICE MANUALS
OR
MilitaryTrucks.ca - M135 Deuce Truck ---Canadian trucks
OR
america1 --Military Radios
OR
500 Free U.S. Military Manauls Survival Ebooks Info Center
OR
https://www.logsa.army.mil/etms/ind...5fb95459e-A3015A99-D14A-19E1-238F1793FB3D9566
This is the mil. TM web site,
--says bad cert., click to go anyway,

Thanks Ron. Just finished bobbing this unit a couple days ago. I will start a thread on that project.