Bristol 4S10, motor downsize?

[Jimmer]

Hi guys, I'm hoping the Bristol experts will chime in. I've found a complete Bristol 4S10 for a good price, but it is equipped with a 10hp 3ph motor. I'm like to know if there is a problem swapping it to a 7.5 hp (or 5hp, but that seems like a big drop) and running it slower? Also, what is the pressure rating of this pump?

Thanks,
Jim

 

[Jimmer]

No comments on it? Does anyone see anything missing or that looks incorrect? The seller knows next to nothing about the machine, so he's not much help.

 

[starnetman2001]

Hello,

I have one of these compressors. Did you ever get any help?

Regards,

David

 

[ti325v]

Post this over on some of the forums in England..
Yorkshire divers...others, lots of Bristols over that way, also
Shelden Sporting Goods Inc. - High Pressure Air Compressors is an American Bristol dealer
Jim will have what you need.

 

[frogman62]

I was an American Bristol dealer for over 25 years. If they are working now, the 4S10 is a reasonably good unit.
It can easily be changed to a 7.5 HP single phase motor. Suggest Baldor 1.15 service factor 3450 RPM motor -- won't be cheap. Run at 950 RPM instead of 1200RPM and it will be fine. The electrical controls can be used with single phase by using a jumper to connect T2 to L3 The single phase motor then connects to T1 and T3. You need the jumper because the 3 phase overload requires three lines and the jumper "fools" it to think it has 3 lines Call me if you have other questions.
Jim Shelden 316-992-0505