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Pony motor starting rope D2 D4
Pony motor starting rope D2 D4
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3 years 6 months ago #226686
by hfdzl
Just my odd curiousity, is there a spec in early books as to the lenght of the pony motor starting rope?
I have the method I use and works fine. Just a trivia question as to anything printed.
Thanks, Herb
R2 5E3562 SP U.S.A. W.9151
R2 5E3563 SP U.S.A. W.9152
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3 years 6 months ago #226688
by D4Jim
Don't know the particular specs but I think the original one for the D4 and D2 were about 6 ft long, 1/4" diameter and made of cotton. As a kid I remember it being about as long as Dad was tall.
ACMOC Member 25 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
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3 years 6 months ago #226690
by juiceman
I wanted to say it was 4.5 to 5 feet long. Around here, if a tractor had one in the toolbox, it pretty much stays with it. Exceptions were the ones made of plastic bale rope/tree rope, or ones ill fitted made with 3/8' truckers rope. Any rope is better than none I suppose. Better yet is a good strong battery with the electric pony start! I swear I've come across a couple that I had wished had an optional pulley that could handle 8 wraps to accept a rope 20' long, because they were so hard to start!
If they all started as easy as my D25U1600 or one of my D69U's, we would live in a perfect world. One tug on the D2, the D6 not even one full snap of the pulley, and its running..
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3 years 6 months ago #226691
by hfdzl
Jim, I make mine as 2 wraps on the flywheel + 6-8 in for grip. I seem to remember seeing a length many years ago. But have have no idea where.
R2 5E3562 SP U.S.A. W.9151
R2 5E3563 SP U.S.A. W.9152
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3 years 6 months ago #226696
by edb
I posted a stand alone Post for this subject in the last year or so and I cannot find it using the Search dis-function--so what has changed as I can no longer locate where to find my Previous Posts as initiated by "edb" ?
Pony Starting Engine Rope Length
My recommendations are for D2-4 - 7 feet, and D6 - 10 feet of 1/4" diameter polypropylene sash cord with a minimum tensile strength of 250 lbs. This information is from a Caterpillar Technical Partsgram issued in May 1966.
The lengths I give will suit a machine with Cat hydraulic or cable blade so you can safely pull start the pony whilst standing on the ground and not balanced on the "C" Frame or track.
Cheers,
Eddie B.
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3 years 6 months ago #226698
by neil
I was about to post but Eddie beat me to it. I was figuring two wraps plus sufficient so you don't have to lean over the tracks to start pulling. I have a wooden broom handle piece on mine for decent pull grip but the rope is just something I whipped up out of crappy climbing rope that's a bit hard on the hands so I'll replace it when I get a hold of some decent sash cord
Cheers,
Neil
Pittsford, NY
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3 years 6 months ago #226701
by hfdzl
Thanks everybody!
Herb
R2 5E3562 SP U.S.A. W.9151
R2 5E3563 SP U.S.A. W.9152
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3 years 6 months ago #226706
by D4Jim
Hey Eddie, Found your old post in Sept 24, 2014.
Horizontal Pony Starter Rope
Hi Team,
went to The Dealer yesterday and got them to look up the above rope lengths by Part Number on their NPR.
From a 1966 Cat Technical Partsgram I have it says :- 1/4" polypropylene sash cord with a minimum Tensile Strength of 250 lbs.
My original D4 one here appears to be 1/4" braided cotton and is 6 feet long.
By the Cat Numerical Parts Record at The Dealer I was given the following lengths :-
D2 & D4 (3B3808 rope) is given as 2 Metres = approx. 6'6"
D6 (8B9724) is given as 3 Metres = approx. 10'
Hope this helps.
Cheers,
Eddie B.
ACMOC Member 25 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
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3 years 6 months ago #226713
by Delta KJ
Thanks to Josh; I never knew the Cat specs on the starting rope... I know that you don't want it too long!
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Pony motor starting rope D2 D4
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