PT Pump Swap Question

[ClintA]

The PT pump in my M936 is leaking bad (like runs out on the oil filter canister) where the throttle shaft comes out, I did my research and seen that I have to sent it to Cummins to get rebuilt, but my Nephew (bless his heart) blew the engine in my M818, and it ran like a champ. Can I take the one off the M818 and put it on the M936? One thing I seen is that the throttle shaft is pointing down on the 818 and is pointing up on the 936. What are my other options? Thanks in advance

 

[machinist75]

I would like to know also. I may be swapping a nhc250 out of a 813 into my 923 that has a bad motor.

 

[timntrucks]

i have a fuel pump for sale out of a 818 with low miles on it in the classified section. i think it would fit in the 12.95 shipping box. im located in la if you need one

 

[WillWagner]

The throttle shaft comes straight out of the pump. the throttle lever can be moved to whatever position is required on the shaft. Just remove the nut and bolt, use a flat blade screwdriver to move the lever positoition you need

 

[ClintA]

i have a fuel pump for sale out of a 818 with low miles on it in the classified section. i think it would fit in the 12.95 shipping box. im located in la if you need one

Thanks just the same, the pump out of my M818 is good,the engine is toast, I am just seeing if it will go on my Wrecker

 

[patracy]

It will bolt on. But there might be a difference in the fuel button/calibration.

 

[doghead]

Yes it will work(run) but you wont have the auxiliary governor anymore.

 

[elkhtr]

I have one that came off a good running engine that I swapped into my 923a1.
It came out of a wrecker, and has the aux govenor.
Cant tell you any more about it other than the engine had an 04 overhaul tag and it runs sweet even with my old pt pump.

 

[machinist75]

Is the auxiliary governer an item on wreckers?

 

[73m819]

Is the auxiliary governer an item on wreckers?

Yes, when engaging the wrecker works, it bring the engine up to wrecker operating rpm and maintains it when the engine loads up.

 

[machinist75]

Yes, when engaging the wrecker works, it bring the engine up to wrecker operating rpm and maintains it when the engine loads up.

Thanks, that's what I thought but didn't know for sure.

 

[wcuhillbilly]

i would like a definative answer on this too. I have a NTC 350 with jakes and turbo Im trying to rebuild, but my NHC 250 in my 816 is gonna have to cough up alot of parts to make this NTC complete....

 

[WillWagner]

i would like a definative answer on this too. I have a NTC 350 with jakes and turbo Im trying to rebuild, but my NHC 250 in my 816 is gonna have to cough up alot of parts to make this NTC complete....

Like what parts?

 

[wcuhillbilly]

Like what parts?

For starters, the NTC 350 is a stripped engine. thus the bell housing adapter, oil filter housing and plumbing, injection pump (350 kinda locked up) compressor likely isnt any good. the 250 will have to give up its crank shaft to the 350 as the story on the 350 is that it tossed a rod.(I cant find any evidence on the block or pan... but cant turn it over either).... the only reason I want the 350 block is the oil coolers..

 

[ClintA]

Does anyone know how to rebuild a PT pump, in my case, I bet it is just a O ring that has went bad. I don't know there for I ask, has anyone tore one apart off a M936 and had luck getting it to work? Thanks

 

[WillWagner]

Is the 350 a small cam or BC1?

 

[73m819]

it is not that hard to take one apart, the big thing is NO crap gets in to while it is open, the ip is soft metal, so watch for NOT gouging, scratches.. I took mine apart on the work bench, started out resealing the input, ended up doing the button, springs, ect ,. YOU CAN do it you self, just take your time.

 

[wcuhillbilly]

Is the 350 a small cam or BC1?

Cummins says its a small cam..... 1977 vintage... Eng # 10616869 CPL: 0160



Most Big Cams Ive been around had "Big Cam" cast into the block on the crank skirts. I find no markings to denote a BC.
Aftercooler, turbo manifolds and core VT50 (locked up bad) and the 25A jake was well worth the $200 I paid for the engine even if I have to scrap the rest.

 

[Csm Davis]

The PT pump in my M936 is leaking bad (like runs out on the oil filter canister) where the throttle shaft comes out, I did my research and seen that I have to sent it to Cummins to get rebuilt, but my Nephew (bless his heart) blew the engine in my M818, and it ran like a champ. Can I take the one off the M818 and put it on the M936? One thing I seen is that the throttle shaft is pointing down on the 818 and is pointing up on the 936. What are my other options? Thanks in advance

Yes you can swap pumps between the 250s but you will need to swap the governor assembly over to the new pump. Also I have noticed that the 816 governor assembly and the 936 governor are not the same.