#44 Hydraulic pump coupling question

D4guy

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I removed the radiator and #44 pump assembly from my D4 by slipping the pump off the splined drive shaft. Not knowing what was inside the coupling I feared that spring loaded balls or other such things would go flying if I opened it up. Later with more working room I cautiously removed the 8 cap screws only to find a grease filled cavity with two rings that seem to have acted as spacers of some sort.

These two rings were all that was inside. (Photo 1)

The ring that bore against the splines of the coupling had worn matching depressions. (Photo 2)

There is nothing but the rough casting of the crank pulley for the second ring to contact. There was no evidence that the second ring even contacted the pulley face. No bar or keys that would engage the notches in the rings. They do not even engage one-another. (Photo 3)

Could it be that someone put these rings in the coupling to reduce its telescoping motion for some reason? The rings are a close but loose fit in the coupling housing, almost like they were made for it.

Any ideas or suggestions out there in 44 land?

[attachment=13550]IMG_1198.jpg[/attachment][attachment=13551]IMG_1197.jpg[/attachment][attachment=13552]IMG_1195.jpg[/attachment]

1955 D4 Traxcavator, 1926 Model T Roadster, 1930 Model A Tudor, 1940 Diamond T 201, 1954 JD 40 dozer
www.mervbergman.net

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Wed, Jul 4, 2012 10:15 AM

SpragueM

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Merv,
That is the correct setup. I cannot tell you why it is that way, maybe for the grease to flow around? I have the book around here some where if you need to borrow it.

Are you going to bring the new toy to the Moon Lake threshing show?

Matt

RD4,RD6 ,D73T, #11 Grader, 977F

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Wed, Jul 4, 2012 6:51 PM

D4guy

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Reply to SpragueM:

Merv,
That is the correct setup. I cannot tell you why it is that way, maybe for the grease to flow around? I have the book around here some where if you need to borrow it.

Are you going to bring the new toy to the Moon Lake threshing show?

Matt

[quote="SpragueM"]Merv,
That is the correct setup. I cannot tell you why it is that way, maybe for the grease to flow around? I have the book around here some where if you need to borrow it.

Are you going to bring the new toy to the Moon Lake threshing show?

Matt[/quote]

Hi Matt,

Thanks for solving the mystery and the offer of the manual. I hope I don't need it.

The JD 40 is a basket case and third in the line of projects so it will not be going to the Moon Lake show. I will be bringing the Diamond T again. ' hope to meet you there.

Merv

1955 D4 Traxcavator, 1926 Model T Roadster, 1930 Model A Tudor, 1940 Diamond T 201, 1954 JD 40 dozer
www.mervbergman.net

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Wed, Jul 4, 2012 7:49 PM

Old Magnet

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Reply to D4guy:

[quote="SpragueM"]Merv,
That is the correct setup. I cannot tell you why it is that way, maybe for the grease to flow around? I have the book around here some where if you need to borrow it.

Are you going to bring the new toy to the Moon Lake threshing show?

Matt[/quote]

Hi Matt,

Thanks for solving the mystery and the offer of the manual. I hope I don't need it.

The JD 40 is a basket case and third in the line of projects so it will not be going to the Moon Lake show. I will be bringing the Diamond T again. ' hope to meet you there.

Merv

That is the correct set up and you are correct about the spacers controlling telescoping of the coupling. Those spacers, when removed, allow just enough clearance to telescope the coupling in order to change the fan belt without removing the #44 pump unit.

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Wed, Jul 4, 2012 9:38 PM

[email protected]

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Reply to D4guy:

[quote="SpragueM"]Merv,
That is the correct setup. I cannot tell you why it is that way, maybe for the grease to flow around? I have the book around here some where if you need to borrow it.

Are you going to bring the new toy to the Moon Lake threshing show?

Matt[/quote]

Hi Matt,

Thanks for solving the mystery and the offer of the manual. I hope I don't need it.

The JD 40 is a basket case and third in the line of projects so it will not be going to the Moon Lake show. I will be bringing the Diamond T again. ' hope to meet you there.

Merv

[quote="D4guy"]Hi Matt,

Thanks for solving the mystery and the offer of the manual. I hope I don't need it.

The JD 40 is a basket case and third in the line of projects so it will not be going to the Moon Lake show. I will be bringing the Diamond T again. ' hope to meet you there.

Merv[/quote]

Merv, I took a look at your 1940 Diamond T on your web site. Looks great. I grew up in a small family trucking business in Vermont. My dad started the company in 1939 and ran it for 50 years. He had mostly Diamond Ts and Brockways. I loved the Diamond Ts. A few years ago I was at an antique truck show in Stowe, Vermont, and saw one of my dad's old tractors there. It was the first twin screw that he owned. Great trucks. Keep on Trucking.

Here are photos of a few early truck. The first is my grandfather's corn binder, probably the first tractor trailer oil tanker in the state. the second is one of my dad's 50's vintage Diamond Ts, and the last is of a 70s vintage Diamond T. [attachment=13555]Early Puffer Trucks photos.pdf[/attachment]Ray

***********************
2F5209 CAT 22, 1967 E-Type Jaguar OTS, Trek 2300 road bike

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Thu, Jul 5, 2012 2:06 AM

#44 Hydraulic pump coupling question

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