2 questions on our M916A1

[MuleMac01]

Hi guys I have 2 questions about our M916A1

Frist off our PTO high idle for the drum winch doesn't work
What should I check?

Second what does this air regulator do in picture?
It's on top of the transmission was leaking air.

 

[fasttruck]

If your truck has the 16 speed caterpillar transmission it could be there to cut the brake line pressure back to a lower value required by the transmission. The cat is an air shift unit and roadrangers which also use air for the range change function have such a pressure reducer.

 

[MuleMac01]

If your truck has the 16 speed caterpillar transmission it could be there to cut the brake line pressure back to a lower value required by the transmission. The cat is an air shift unit and roadrangers which also use air for the range change function have such a pressure reducer.

No it has the Allison transmission.