Champion RV-15A Compressor Pump - Any feedback??
- Thread starter Davefr
- Start date
b-body-bob
Well-known member
It might be worthwhile to figure out what changed between the various revisions of the pumps. I think they're up to the 15C now. At some point they changed the valve sizes, because the gasket/seals for a 15 won't work in a 15B. (For the 15 pump, they're all the same size, for the 15B they're all different.)
I've got a 15B and the cylinder/head look nothing like that one, although the crankcase and unloader look the same.
I've got a 15B and the cylinder/head look nothing like that one, although the crankcase and unloader look the same.
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mayday0017
Well-known member
I have that EXACT same pump and it works great. The difference between it and the 15B is it isn't pressure lubed and also doesn't have disc valves. The 15B is a great pump but the 15A is plenty good for a home user or shop. My compressor started out life in a hanger at a small airfiled in the overflow shop. It lasted 10 years of no one changing the oil in it because it was forgotten about. I bought it and lucked into a new old stock 15a from Grainger for $300, took it off the pallet and tossed it on and have about 14 running hours on it now and couldn't be happier!
mayday0017
Well-known member
Side note if you have any questions, need any measurements, or want any info on the inside build quality I can help yah out. I have the old one in pieces in the shed I can pull measurements off anything yah need.
Thanks but I don't think so.
I believe the R15's and RV15's are different pumps. This one is Grainger/Zoro P/N 1WD21 and they call it Speedair. Zoro calls it their "value" brand.
Everything looks identical to Champion RV-15A and spare parts all cross reference as the same.
Grainger claims this pump is made in the USA.
b-body-bob
Well-known member
I've had my 15B completely disassembled, and it is splash lubricated and it has disc valves.
You can see exploded views of the 15 series pump at this link http://compressors.tpub.com/TM-5-4310-350-14/
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b-body-bob
Well-known member
The 15 series pump does have a one piece head and cylinder. I've got one, and I know mmouse does also. Mine is a B series, his is earlier because he has mentioned it has a hand hole to access the crankcase. Later series do not.
The main difference I see between mine and the stock photo posted is that my 15B has more cooling fins, and the manifolds also look to be different.
.. another question.
As long as I run the pump at the recommended speed for a 5 HP motor. (ie 734 RPM) does it matter if my existing motor is 3450 RPM vs 1750 RPM?
Unless I'm missing something I don't see why the pump would care about motor RPM as long as the pulleys are ratio'd correctly to deliver the correct pump RPM?
As long as I run the pump at the recommended speed for a 5 HP motor. (ie 734 RPM) does it matter if my existing motor is 3450 RPM vs 1750 RPM?
Unless I'm missing something I don't see why the pump would care about motor RPM as long as the pulleys are ratio'd correctly to deliver the correct pump RPM?
b-body-bob
Well-known member
^ I agree it seems like you'd just make up for the motor speed via the motor pulley size.
The only issue you may run into is pulley wrap depending on the CTC of the motor and pump shaft. Since the 3450 motor will need 1/2 the diameter pulley of the 1750 motor, for a fixed motor to pump position you will end up with less wrap and higher alpha, which may cause issues at startup. I'd run the numbers real quick to make sure.
