Pony Motor - Was Intnl Crawler

Oct 13, 2004 11 Replies
R

I remember the pony motor on an old D4 Cat we had at the company where I worked summers during college. I'm trying to remember the sequence of operation and was hoping somebody would tell me what each step was doing. There were two levers near the pony mother as I recall. You first put lever #1 in a certain position, and then started the pony motor, and watching till some guage went up to a certain level (40?) Then you pulled in the second lever, engaging a clutch to turn the diesel over. Once the diesel started the clutch was disengaged and the pony motor shut down. What did the first lever do and what was going on when the pressure was building on the guage?



RWL


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W

i think 1 was a compression realease for the diesel on the d4d & 1 was the clutch for the pony motor engagement

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O

RWL wrote in news: snipped-for-privacy@4ax.com:

I can't answer for that particular machine, but our farm tractor worked as follows:

Lever 1 was a compression relief for the main diesel engine Lever 2 was the clutch engagement for the pony motor.

Sequence of start was:

  1. Open compression bypass (lever 1)
  2. Start pony motor
  3. Engage pony motor clutch to turn main engine
  4. Close compression release (lever 1 back to running position)
  5. When main engine starts, release pony engine clutch.
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K
1 open gas valve to pony engine. 2 make sure clutch handle is up and tyranny is out of gear. 3 open compression on diesel. 4 set throttle and choke on pony. 5 start pony adjust choke and throttle. 6 make sure diesel fuel lever is off. 7 put tranny in gear and slowly engage clutch. 8 Let the engine run a bit to warm diesel. 9 Very fast slam close compression leaver and open diesel fuel leaver. 10 If diesel started Shut off pony. 11 make sure pony tyranny's out of gear... 12 Shut off pony's gas line.
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S

Is "Pony Motor" US English for "Donkey Engine" in real English then?

:-) Steve

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R

Ahh. Two countries divided by a common language. It looks like the emoticon is indicating you say that tongue in cheek.

I assume the two terms refer to the same device. In the US, a pony motor refers to a small gasoline auxiliary engine used to start a diesel engine. I've never heard it used in a different situation, but I couldn't say there isn't a second meaning for "pony motor" in the US.

What are some of the other items for which the two countries use different terms? Lets see...

UK >> US

Silver Steel = high carbon steel (or tool steel)

Paraffin oil = Kerosene.

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G

Up here in the frozen north I have often heard them refered as "pup" as in SOB perhaps

Gerry :-)} London, Canada

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J

Also, silver steel = drill rod.

Jim

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D

I've also hear of gasoline auxiliary power units (APU's ... usually a DC generator) referred to as "Pony Motors" .. also as "Little Joes". Usually these are used to charge batteries, or run auxiliary equipment when the main engine is not running. Such an APU can be of assistance in starting a larger motor, though it's not mechanically connected to it.

Dan Mitchell ============

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B

Steve wrote;

Is "Pony Motor" US English for "Donkey Engine" in real English then?

A donkey engine is a term that describes a winch used for pulling or hoising. There are usually a set(s) of windlasses to wrap a rope around to pull, hoist, drag, etc. The winch can also be used to pull the donkey into position.

Bob

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