Rebuilding a Piston Pump, need guidence
#1
06-14-13, 05:43 AM
Rebuilding a Piston Pump, need guidence
I picked up the rebuild kit for my Duro piston pump last night.
Although my pump is ~75yrs old, the design hasn't changed much and is actually pretty popular (found a rebuild kit in stock at the local hardware store).
The pump I'm working with is a Duro B-251, which was later manufactured under the model K-255 (before being sold and branded as pompco).
The kit consists of;
- Leather cups
- Gaskets
- Rubber valves
- Springs, washers and cutter pins
- packing kit
Does anyone have any experience with rebuilding these pumps and or could provide some guidence, tips or tricks?
I'm pretty mechanically inclined, but would like to have as much info as possible before feeling through the project.
I haven't had any luck finding the info regarding doing a rebuild online. Found tons of videos of similar pumps running after being rebuilt though.
Although my pump is ~75yrs old, the design hasn't changed much and is actually pretty popular (found a rebuild kit in stock at the local hardware store).
The pump I'm working with is a Duro B-251, which was later manufactured under the model K-255 (before being sold and branded as pompco).
The kit consists of;
- Leather cups
- Gaskets
- Rubber valves
- Springs, washers and cutter pins
- packing kit
Does anyone have any experience with rebuilding these pumps and or could provide some guidence, tips or tricks?
I'm pretty mechanically inclined, but would like to have as much info as possible before feeling through the project.
I haven't had any luck finding the info regarding doing a rebuild online. Found tons of videos of similar pumps running after being rebuilt though.
#2
06-14-13, 04:09 PM
The pump
I have not rebuilt a piston pump since the early 60s, but what I can say, is when you install the packing don't tighten it too much, as a slight drip will lube the packing as not to burn or harden it and make the motor work easier.
Sid
Sid
#3
06-15-13, 07:45 AM
[QUOTEI have not rebuilt a piston pump since the early 60s, but what I can say, is when you install the packing don't tighten it too much, as a slight drip will lube the packing as not to burn or harden. [/QUOTE]
That is the one bit of info I do know. I suspect someone had cranked it pretty tight to compensate for the packing. When I ran it to inspect, there was a pretty good drip and the motor and belt where getting warm. Think the motor hit 150'f and the belt and pull ie at the motor was 110'f.
Efficency is down too, which was a big indicator of a rebuild.
I'm going to drop the pressure down on it. Currently its running 40/60, and that is a bit much for this pump I think. Will try 30/50 and monitor. It's not going to be used as our main source for too long, so if the drop is noticeable, we'll just deal with it.
That is the one bit of info I do know. I suspect someone had cranked it pretty tight to compensate for the packing. When I ran it to inspect, there was a pretty good drip and the motor and belt where getting warm. Think the motor hit 150'f and the belt and pull ie at the motor was 110'f.
Efficency is down too, which was a big indicator of a rebuild.
I'm going to drop the pressure down on it. Currently its running 40/60, and that is a bit much for this pump I think. Will try 30/50 and monitor. It's not going to be used as our main source for too long, so if the drop is noticeable, we'll just deal with it.
