Distinguishing a SO from a HO pump

FosterW

How Now Brown Cow
Joined
Oct 28, 2008
Messages
460
Is there a way to tell the difference between an HO pump and an SO pump?
I have a hunch my pump may have been replaced by the previous owner and I would like to know if its an SO or HO.
 
on the pump serial number ( on the side plate)... the last three numbers on the SO pump is 027 and the last three on the HO are 028.

This is pulling from my memory of about 3yrs ago when I looked into it.

Lavon
 
Its hard to get a good look at the serial number since its facing downward but this is what I got.

0 201 001 027 big space then theres 5 or 6 more numbers I couldn't make out.

Is this an SO?
 
Thats awesome! but don't re-man pumps usually have the paint dots on bolt heads and some other markings? This one has non of that.
 
some do, and some don't. most rebuilders do it just so they can tell if someone tried to get inside. Its more for warranty purposes.

Lavon
 
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