Cummins 250 belts

fixing to change all the belt on the truck...cummins 250. what the best way to change out the belt ? it looks like i will have to remove everthing up front just to do it..(radiator, fan). any help.......i mean any would be great... thanks
P.s anyone know the sizes either?... just asking

It should be covered in here ; TM9-2320-260-20.pdf But since you didn't specify which model it's a guess . the rest of the TM's can be found here ;
5-ton and up TMs

For belt numbers this may help you ; https://docs.google.com/spreadsheet/...UsxVnotLXZYUlE

problem is i dont know really what it is......xm813 cab m814 frame...i am guess.. but thanks for that

For a NHC250 in a XM813, M817, or M816, or other M809 series truck...

Car Quest TR22425 Napa 2522425 Waterpump (1) belt
Car Quest 13A11p5 Napa 259470 Powersteering (2) belts
Car Quest TR22401 Napa 2522401 Main Drive (2) belts
Car Quest 11A0915 Napa 257360 Generator (2) belts

Remove the fan... Radiator can stay in place.

what about the m814 same way??? that makes my day, thanks

The belts can be put on without REMOVING the fan, just walk the belt on as you rotate the fan. the water pump needs to rotated to loosen and tighten the belt, think there are 6 bolts that tighten it down, back off the bolts then good luck

73m819 said:

The belts can be put on without REMOVING the fan, just walk the belt on as you rotate the fan. the water pump needs to rotated to loosen and tighten the belt, think there are 6 bolts that tighten it down, back off the bolts then good luck

Click to expand...

True, but I always find it a LOT easier to put the belts on and get everything tensioned without having the fan on...
I always hold me breath when rotating that water pump to get the belts tight...

biggen said:

what about the m814 same way??? that makes my day, thanks

Click to expand...

Same engine...

The bad thing about the water pump, is most are NOT installed with a lot of anti seize, making then HARD to move, then after thay do move, the F---en things sometimes LEAK which now means you have to pull the water pump, install a new sealing ring. a bit of anti size sure saves a major hassle

The trucks are the same from the cab forward. It doesn't matter what is behind the cab, the belts are all the same.
I have looked at the job, and it looks like an all day job. It is tight, and soldier b will be a big help. You do not have to remove the fan- it might help, but then, it also makes for more work.

well everything went great .. taking radiator to get clean....but the belt that goes to the water pump? and big pulley don't know how to take that one off . well easy way. ...thinking lossen pump pulley maybe? any ideas that could help with it?............thanks

Water pump housing is round but pump is off center making it eccentric. Back off those 6 bolts then use a small pry bar or screwdriver to insert in between pulley and groves on housing to rotate pump. You have to break the seal for it to rotate. think of a circle with an oval inside of it. The housing is the circle and the pump is the inner circle or oval.

Pulley is pressed on. Most likely distrubing the seal will cause it leak and pump will have to come off to change.

Major pia. Napa does stock the pump and gasket. Midland rw1174x. Gasket was $15, Pump $75. I chose to change the pump since it was the same amount of labor. Napa stocks the belt. 25-22425. It takes one the other groove is empty.

There are some oe belts on epay for the water pump that are nos military. I found that belt to be wider and a better quality than the gates/napa one search 22425.

Best of Luck. I did pull the fan, fan clutch and quarter radiator shroud to make it easier. Cooling system holds 47 qts and they will ALL leak out!

This was quite an ordeal and all day for my first time but now could do it faster with the experience learned.

thanks juanprado. thats help me out so much, and hope to save me alot of time, thank you.

loking for cummins 250 belts or numbers for a 1985 m929.

Since I found I had a belt missing this week I decide to put a couple of new ones on my M813. Good luck finding a fan belt. Everyone calls them main drive belts. I could find no reference to a main drive belt but I did find the fan belts. They are just called belts in the table of contents.

After checking the manuals:

http://www.steelsoldiers.com/upload/809/TM9-2320-260-20.pdf
and
http://www.steelsoldiers.com/upload/809/TM9-2320-260-34P1.pdf


I decided to update the current part numbers with a more fitting description for the slow kids like ME.

There are 7 (yes seven) belts on an NHC-250 Cummins in a 5-ton M809 series truck.

Water pump belt (only one). It is the belt all the way towards the back of the accessory drive pulley. This belt goes from the accessory drive pulley to the water pump.

http://www.steelsoldiers.com/upload/809/TM9-2320-260-34P1.pdf
Sec II fig 89 item 1

Car Quest TR22425 Napa 2522425 Waterpump (1) belt



Power steering belts (yes, two). These are next two belts in front of the water pump belt. They go from the accessory drive to the power steering pump.

http://www.steelsoldiers.com/upload/809/TM9-2320-260-34P1.pdf
Sec II fig 219 item 7

Car Quest 13A11p5 Napa 259470 Powersteering (2) belts



Fan belts (yes, two). These are the last two belts on the front of the power steering belts. They run from the accessory drive pulley to the front two grooves on the 4-groove fan pulley.

http://www.steelsoldiers.com/upload/809/TM9-2320-260-34P1.pdf
Sec II fig 90 item 16

Car Quest TR22401 Napa 2522401 Fan (a.k.a. main drive belt) (2) belts



Alternator belts (yes, two). These are the back two belts in the fan pulley. They go from the fan pulley to the alternator pulley.

http://www.steelsoldiers.com/upload/809/TM9-2320-260-34P1.pdf
Sec II fig 91 item 10


Car Quest 11A0915 Napa 257360 Generator (2) belts


If there is a mistake by all means let me know and I will correct it.


Oh yeah, how did I find all this stuff? Take a guess.

You called me!

doghead said:

You called me!

Click to expand...

Yeah, there's that too.

I just put all new belts on my m817. I could not no matter how I tried get the 2522401 belts on. That is with the fan and radiator removed. They were just too small. I put a set of old belts on that fit but the numbers are worn/faded off. I suppose I will take the 2522401 belt back and ask for the next size up.