Farmall 140 Water Pump Replacement

[C.Amick]

Bought this 140 that hadn't ran in quite a while. I got it running and discovered a leaking water pump. Judging by the sludge build up on the front of the engine, it had been leaking for a long time. This was not an easy job. Those hoses were hard get all connected up.

 

[Mrfred54]

Ya, fun time. I replaced a pump and had radiator record earlier this year. Looks like yours needs a good

 

[RTR]

They aren't that hard to do, but yes those hoses are the worst part. I've done enough I've kind of figured it out. I think I'd give it a good steam cleaning before putting it back together. If you're trying to find a pump, you can get them through NAPA or this site. Yours is the newer style (late 1963 - 1979.

 

[C.Amick]

Ya, fun time. I replaced a pump and had radiator record earlier this year. Looks like yours needs a good

If you replaced the fan belt, do you remember the length? I bought a 42 inch one, which is supposed to be the correct length, but it is too short.

 

[C.Amick]

They aren't that hard to do, but yes those hoses are the worst part. I've done enough I've kind of figured it out. I think I'd give it a good steam cleaning before putting it back together. If you're trying to find a pump, you can get them through NAPA or this site. Yours is the newer style (late 1963 - 1979.

I ordered a new water pump, hoses, and fan belt from this site. I ordered a 42-inch belt and it is too short. I can't figure out why. It should the correct belt. The only theory that I have is that the generator may not be the original. I shoved the generator up against the engine block and still couldn't get the belt hooked up.

 

[Jim Becker]

My reference says the belt should be 367697R1. This is a v-plain that is 3/8 wide, 42 outer diameter, 5/16 deep. This is from a 1968 publication. Later tractors could have used something different (but I don't see that online either).

 

[C.Amick]

My reference says the belt should be 367697R1. This is a v-plain that is 3/8 wide, 42 outer diameter, 5/16 deep. This is from a 1968 publication. Later tractors could have used something different (but I don't see that online either).

Thanks, for the reply. The tractor is a 1963 model. Guess I will buy a longer belt? I checked the location of the pulley on the new water pump. Seems to be in the same as the old one.

 

[RTR]

Thanks, for the reply. The tractor is a 1963 model. Guess I will buy a longer belt? I checked the location of the pulley on the new water pump. Seems to be in the same as the old one.

I should say that in mid 1963 the generator changed from 6v to 12v . Not sure if that matters or not but also did the water pump change and I’m thinking that the belt on the older version was 1 wide belt for everything. Not sure which one yours is in regards to the change over.

Post pictures if you can. Do you have the water pump they the fan mounts to, or the water pump that is mounted towards the bottom of the engine near the lower rad hose?

 

[Jim Becker]

The low-mounted (water inlet) pump was used on earlier models up through the 130. It used a wider belt to drive the fan. A second belt ran from the fan hub to the generator. The 140 used a pump mounted high up with the fan mounted on it. It used a single fairly narrow belt (3/8) to drive both the pump and generator. My reference (and online diagrams) together indicate no changed to the belt over the years. I didn't think 6-volt vs. 12-volt made any difference. I was unsure whether the belt changed for alternators. But the references indicate not.

 

[C.Amick]

I should say that in mid 1963 the generator changed from 6v to 12v . Not sure if that matters or not but also did the water pump change and I’m thinking that the belt on the older version was 1 wide belt for everything. Not sure which one yours is in regards to the change over.

Post pictures if you can. Do you have the water pump they the fan mounts to, or the water pump that is mounted towards the bottom of the engine near the lower rad hose?

I should say that in mid 1963 the generator changed from 6v to 12v . Not sure if that matters or not but also did the water pump change and I’m thinking that the belt on the older version was 1 wide belt for everything. Not sure which one yours is in regards to the change over.

Post pictures if you can. Do you have the water pump they the fan mounts to, or the water pump that is mounted towards the bottom of the engine near the lower rad hose?

It's the fan mounted water pump. The belt that came off was a 42 inch. It was very cracked and stretched though. I guess I just need to buy a longer belt and stop trying to figure out why a 42 inch won't go back on there.

 

[RTR]

The low-mounted (water inlet) pump was used on earlier models up through the 130. It used a wider belt to drive the fan. A second belt ran from the fan hub to the generator. The 140 used a pump mounted high up with the fan mounted on it. It used a single fairly narrow belt (3/8) to drive both the pump and generator. My reference (and online diagrams) together indicate no changed to the belt over the years. I didn't think 6-volt vs. 12-volt made any difference. I was unsure whether the belt changed for alternators. But the references indicate not.

Thanks Jim. I couldn't remember whether there was a separate generator belt in those early ones or not. If my memory serves me correct - the early 140 (1958 through mid-63) did have the lower water inlet style pump like used on the 130 and 100. I've owned several of them, but it has been a few years since I've looked at one and don't have one nearby to take a picture of.

 

[Jim Becker]

It's the fan mounted water pump. The belt that came off was a 42 inch. It was very cracked and stretched though. I guess I just need to buy a longer belt and stop trying to figure out why a 42 inch won't go back on there.

Don't understand how an old 42" belt came off but a new 42" belt won't fit, even if the old one is worn and stretched. You aren't trying to put it on with the generator in the position shown in your picture are you?

 

[C.Amick]

Don't understand how an old 42" belt came off but a new 42" belt won't fit, even if the old one is worn and stretched. You aren't trying to put it on with the generator in the position shown in your picture are you?

I don't understand it either. I pushed the generator up tight against the engine block and belt still didn't come close to going on. I measured the belt to make sure it was a 42 inch one. The new water pump casting is shaped different from the old one. This one has a flat horizontal surface on top where the bypass hose connects. Pulley seems to be in the same location though.

 

[Jim Becker]

Try installing the old belt. If it won't fit either, something in the pulley positions had to change. Can you post pictures of both the old and new pumps?

 

[C.Amick]

Try installing the old belt. If it won't fit either, something in the pulley positions had to change. Can you post pictures of both the old and new pumps?

Unfortunately, I threw the old belt away. According to the number on it (15420), it was a 42-inch. I can post photos of the 2 pumps.