Borg Warner T72/520-4 Loadall

[Norm]

Anybody any idea why the transmission might want to be pulling in both directions at once? Inching valve problems?

 

[Pheasant Surprise]

Don’t know anything about them, but sounds to my uneducated mind that the both forward and reverse packs are being simultaneously engaged - rotary selector valve issue?

 

[ACEngineering]

Anybody any idea why the transmission might want to be pulling in both directions at once? Inching valve problems?

It will be 1 of the following.

Broken bevel piston return spring
Worn cross shaft seals/shaft or housing.
( housing can be rebored and sleeved)
Cracked weld in clutch pack drum allowing pressure to go both sides.
Broken sealing ring on clutch pack shaft allowing oil to both packs.

I know a man that will sort it for you if you want to send me PM. Either way it's a box out for full overhaul and test.

 

[essexpete]

Vicary Plant in Leicestershire used to carry exchange shuttle units if you don't want to rebuild yourself.

 

[Norm]

It will be 1 of the following.

Broken bevel piston return spring
Worn cross shaft seals/shaft or housing.
( housing can be rebored and sleeved)
Cracked weld in clutch pack drum allowing pressure to go both sides.
Broken sealing ring on clutch pack shaft allowing oil to both packs.

I know a man that will sort it for you if you want to send me PM. Either way it's a box out for full overhaul and test.

Another clue may be that the inching pedal suddenly stopped working about two years ago. Moves lever to full extent with no effect.

 

[Norm]

Don’t know anything about them, but sounds to my uneducated mind that the both forward and reverse packs are being simultaneously engaged - rotary selector valve issue?

I know both packs are engaging but can't see in the manual from where the problem may be emanating. Got the pdf many years ago from Footsfitter, many thanks though.

 

[ACEngineering]

Another clue may be that the inching pedal suddenly stopped working about two years ago. Moves lever to full extent with no effect.

no really no, sanderson used a solenoid on that instead, its not really an inching valve its a dump valve so you can change gear.