Cat 22 water pump.

I need to adjust my fan belt and I cant get the water pump sheeve to turn either direction. I have removed the set screw and hit it with PB Blaster with no results. Can the fan blade be removed without pulling the whole water pump. Maybe without the fan in the way, I can get a chain wrench on the sheeve. Any suggestions are welcome, Thanks, Grant.

I’m following this thread. I picked up a 22 recently, but it came with a leaking water pump. I haven’t looked at it close enough to decide where to begin with it. Even though I bought it for yard art, I want everything to function properly. Come to think of it, one of my Fifteens leaks too! The joys of owning old iron. JM

After 3 hours and a lot of "MAGIC WORDS" I managed to get the sheeve to move enough to adjust the belt. It was not easy. After lots of PB Blaster and tapping on the sheeve, I got out a brass drift and really started whacking it to get it to move. I had a long bolt in the lock screw hole for leverage. That did not work so I brought out a small torch and heated it as much as I could without burning the belt. That also did not work. I finally made up a fitting that I could put air pressure into the lock screw hole. Filled the adapter pipe with more PB and put 100 psi to it and heard a very small pop and then air hissing. It still would not move so I did it again. I removed the air adapter and put the long bolt back in and smacked it again with a 3 pound hammer and it started to move. After all of this I went over and looked at my other 22 2F340 which is only 19 numbers more than my runner (occasional runner) and the water pump is noticeably different. Since there is no service manual for 22s, I looked at a D2 manual and it seemed to make sense. Not much different than a 22. Your comment about leaks would probably mean taking off the radiator and removing the pump. It looks like a rebuild would not be too hard. The Saga continues. Grant.

The best "fix" for these machines after the pony pinion is the water pump pulley. If there's any reason to change out the pump/bearing/seals, cleaning up those threads yields a great benefit in adjusting. I did mine on the 5U and am really glad I did. I'm sure all this stuff was easy to adjust when new but after years of dried-out, caked-on grease and crud, they're almost unusable. I spent an hour with the thread file and made sure there were zero spots that bound all the way in and all the way out

I should have noticed before but the leaking is probably just a small tightening of the gland nut on the shaft. If the packing is worn out I think you can repack it without taking the pump apart. It is almost the same as a sailboat prop shaft packing, only smaller.

neil is right about the threads being lousy. What they dont tell you in the 15 service manual or in LaVois book is that there are three grooves in the threaded part of the sheeve and you should line up the sheeve so the set screw goes into a groove rather than on to threads. My guess would be that not many owners know about that. It is only mentioned in a D2 book and even then it is easy to skip over. I used to think of Cats as "Good Old Time Engineering", but I am un-impressed with a few things.