Hydro Pump Motor ID/Advice

833 Views 4 Replies 3 Participants Last post by major, Jun 21, 2017

paulpaul

Discussion Starter · Jun 19, 2017 (Edited)

Hi everyone, I'm very new to this and have a motor question!

I'd like to ask if anyone can help ID or offer any advice on a hydraulic pump motor I found at a local repair shop. I've been reading about the advantages of DC series wound but can't tell what this one is. Do the two lugs suggest that it'd at be series or shunt? If it seems solid I'd hope to buy it to put into a 73 beetle for my first ev conversion. Thanks so much for any advice! --and sorry for the crappy pics!

The tag doesn't help much:
Caterpiller
DC Volts 48/36
Part number 379629 (doesn't yield much in a google seach)

Dimensions:
9.5"x13"
Not sure about weight, heavy?

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arklan

· #2 · Jun 19, 2017

nothing to it but to do it.
it looks the goods to me but im not an expert.
if its cheap then u could try it and see?

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major

· #3 · Jun 19, 2017

Very good chance it is series wound. It is unidirectional. Correct for you? If not; a bitch to reverse. Drive end bell likely needs machining to mate to adapter or tranny or drive shaft. Also motor output shaft is short stub. Can you use it?

Motor appears in good condition and being from a Cat, beefy enough for a small car. You may need to vent that drive end bell and force air thru it if duty cycle is lengthy.

major

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paulpaul

Discussion Starter · #4 · Jun 21, 2017

Thank you both for your input. Major, just so I learn something here, what are clues that indicate that it's series wound? Also, I think unidirection will be ok, it'll be going into a standard transmission. I should be able to get the correct spin to match the transmission by testing the motor with either polarity--right?

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major

· #5 · Jun 21, 2017

paulpaul said:
Thank you both for your input. Major, just so I learn something here, what are clues that indicate that it's series wound? {1} Also, I think unidirection will be ok, it'll be going into a standard transmission. I should be able to get the correct spin to match the transmission by testing the motor with either polarity--right? {2}

{1} Experience. Never seen a shunt pump motor on a fork mast. Compound maybe, but rare.

{2} Nope. On a PM motor that works. But not on wound field motors. To reverse rotation you need to reverse field relative to armature which involves internal mods.

major

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