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  1. Forum
  3. Antique Caterpillar Machinery Owners Club
  5. DISCUSSION
  7. Cat Thirty water pump shaft length

Cat Thirty water pump shaft length

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4 years 2 months ago #220310 by Mike Meyer
Cat Thirty water pump shaft length was created by Mike Meyer
I need to get 2 new water pump/ accessory shafts made for the "new" Thirty's, but noticed there is a big difference in length between the 1925/26 tractor and the 1928/29 tractor on the shaft section running from the water pump to the magneto drive, and I'm wondering was that because of a change in magneto's from Bosch ZR4 to Eisemann G4, or has someone simply done a bodgy job years ago and changed the shaft to fit something completely off the list?

I guess the simple question is, did the accessory shaft change in length between 1925 and 1930 on the Cat Thirty?
Thanks
Mike
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4 years 2 months ago #220312 by chriscokid
Replied by chriscokid on topic Cat Thirty water pump shaft length
Best Parts Book No3 list the following
S-470 Shaft used S1001-S1275 and S1276-S1675 and S1676-up

Caterpillar Parts book 1926-1928
PS1-PS-2932
S-4683-S-6761
Show Part # S-470
only one end is turned down

Caterpillar Parts Book 1928-1932
S-6782-up
PS-2933- UP
Show Part # S-2322
both ends are turned down

There is no mention of an option shaft for the water pump in the Attachments book S-1001-S-10536 and PS-1-PS-14292

To answer your question about the length of shaft changing, i have no idea, the part number did change, but that could have been because the change in the ends not the length.
Erik Christenbury
Cat List: More than some, less than others
chriscomachinery.com/caterpillar-machinery/

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4 years 2 months ago #220333 by Mike Meyer
Replied by Mike Meyer on topic Cat Thirty water pump shaft length
Thanks for the part number check Erik, I don't have a Bosch ZR4 here to check with, but I do have a Eisemann G4, I'll see how that compares on the 2 tractors.
Regards
Mike

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4 years 2 months ago #220346 by Mike Meyer
Replied by Mike Meyer on topic Cat Thirty water pump shaft length
Relax everyone, I've worked it out, I forgot I had a rotted and busted ZR4 maggy here that came with these "new" Thirty's, the "shorter" accessory shaft is needed for those mags, so when Cat moved to the Eisemann G4 they needed the longer accessory / waterpump shafts to reach the Eisemann.

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4 years 2 months ago #220347 by Andrew
Replied by Andrew on topic Cat Thirty water pump shaft length
Glad to hear you got it sorted Mike.
I can relax now . LOL.

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4 years 2 months ago #220349 by Mike Meyer
Replied by Mike Meyer on topic Cat Thirty water pump shaft length

Glad to hear you got it sorted Mike.
I can relax now . LOL.


Ha ha, yes Andrew, everyone go back to what you were doing.......

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4 years 2 months ago #220355 by naylorbros
Replied by naylorbros on topic Cat Thirty water pump shaft length
S470 look like 28 5/8" long and S2322 looks like 31 13/32" long.

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4 years 2 months ago #220360 by Mike Meyer
Replied by Mike Meyer on topic Cat Thirty water pump shaft length
Thankyou for the lengths naylorbros

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4 years 2 months ago #220376 by Mike Meyer
Replied by Mike Meyer on topic Cat Thirty water pump shaft length
They say a picture is worth a thousand words, how much are several pictures worth I wonder? You will see the comparison between the busted Bosch ZR4 and a Eisemann G4, I think the ZR4 might be knackered......
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  1. Forum
  3. Antique Caterpillar Machinery Owners Club
  5. DISCUSSION
  7. Cat Thirty water pump shaft length
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