Was broke down just north of Knoxville TN. m923a2 need air pump !!

[auctionaddict]

Het guys, I just sold my cherry 923a2 to a super cool guy from New York. He made it just north of Knoxville and lost air pressure. He has a mechanic with him and they need an air pump. Lost pressure and hardly any output directly from pump.
He is on HWY 40 at midway road exit. Between 75 and 81 hwy.

Anyone close that can help ???

 

[m16ty]

I'm nowhere near them so I'm of no immediate assistance.

Is the mechanic familiar with air brake systems? The reason I ask this is because it's unusual for a compressor to just quit pumping short of a catastrophic failure. Sounds like the valve in the top may be stuck. They may try to take the top off (not the head) and see if it just needs cleaning.

 

[auctionaddict]

Not sure if he is. The truck has the 8.3 turbo motor

 

[Suprman]

Insert finger in air dryer expello valve push up

 

[auctionaddict]

Mechanic on scene says...

No air from pump at idle !!

Can the governor valve be accessed thru the air intake port ???

 

[auctionaddict]

 

[auctionaddict]

View attachment 484537

Cant unload the support vehicle !!!

 

[auctionaddict]

The governor valve is stuck open, Not pumping air ??

 

[topo]

I,m to far to help .Maybe someone could bring you a gas powered air compressor To get you off the road .

 

[auctionaddict]

Can I remove the compressor head and "coolant plate" without loosing coolant ??

 

[swbradley1]

Update as the day crew comes online?

 

[auctionaddict]

Still in Knoxville anybody know the internals on this pump ?

Nat 706-455-4469

 

[doghead]

It's covered in the TM.

 

[porkysplace]

View attachment 484537

All they need to do to unload the car is call a rollback tow truck .

 

[BBQROD]

Buy a 2000 watt inverter and a small electric air compressor just a band-aid to get you home.

 

[mahdey]

The air compressor on these is an off the shelf unit that any good truck supply shop will most likely have in stock. I believe NAPA sells them for around $400. If he does not have any air coming out of the outlet of the compressor then that is a guaranteed sign of a failure. If he has the ability to drain the coolant and pull the head off the compressor, he may be able to see if it is just damage to the head and get a new head for it.

 

[doghead]

Just because you don't know what your doing is no reason to act impulsively or take random actions.

Why not troubleshoot as outlined in the TM?

 

[doghead]

Has the air dryer been serviced in the last 6 months?

 

[twinturb089]

take off the 4 bolts on the head of the air pump and make a gasket out of gasket material.I can almost gaurentee that is your problem......I have had it happen more than once.Those air compressors dont go bad.It is almost always the top or bottom gasket has failed.part number on gasket is cummins 4920062 for the top gasket, lower gasket is cummins 154018

 

[Tow4]

Here's the air pump figure and part list from the TM. I hope it helps.

Good luck.

View attachment M939A2_air pump.pdf