M813 5 ton sprag problems

[ccequipment]

Guys, got a M813A1 5 ton in the shop with no front wheel drive going forward. It does not have the air woosh sound when going into forward gears. I have good air pressure coming out of the detent valves with the lines unhooked, they work fine in forward and reverse. I also have a good seal on the 2 large seals on the piston on the transfer. You can hear the piston move when going to reverse, but not forward, and like I said I have good air pressure to actvate it. I have not really looked into any deeper, plan to in the morning, but I thought I would pick your brains a little first.

 

[73m819]

think the cylinder seal for forward needs replacing

 

[R Racing]

Did you try swapping the air lines . There was a post a few weeks back were the lines from the Depot were swapped and had a simular problem. Just a thought.