Help Decoding Specs for a Parker Trim Pump

[Iplayfarmer]

Iplay,
1) are the cylinders on your tilt trailer going to be single or double acting? If single acting you will still have to run the pump to lower due to the dual Pilot operated checks. You may also have to install some form of flow/speed control on the lower to prevent the system from chattering. The chatter can be caused if the trailer free falls dowm mometarily. The check closes, pilot pressure builds, check opens, trailer free falls, check closes, etc.

2) Pump flow varies with system pressure. These are usually inexpensive motors where the RPM varies with load. In your case I would guess the time to tilt would probably less than 10 seconds under most conditions.

Will you using this in the winter? If yes, you may want to look closely at what the differences are between the winter units and the summer units.

Roy

Good questions.

1) My cylinders are double acting. I'll have power up and power down. I don't know if there's an advantage to power down, but it's what I have.

2) I was wondering how that chart worked. Am I to understand, then, that the pump will work at a higher volume and lower pressure until it meets a greater load? That would be very nice if that is the case.

I do plan on using the trailer in the winter, but not much. Most of my trailering is in the spring and fall as I run around tilling gardens for friends and relatives. The pump I have is what I have, though. Is there something I need to be concerned about?

 

[Leejohn]

Iplyfarmer,

!st off your trailer is a lot bigger then I had in mind. Anyway the oildyne pump took a #2 stern drive up in 10sec. and down just alittle faster, but was real close to the 10sec.
That #2 drive cyl. are bigger on the out side from a #1 drive so would guess piston is no bigger then 1 1/2". Sten drive cyls. have a floating piston and a piston on the shaft and that one has check valves in it. The reason for that is when something is hit the check valves open, also the floating piston and other check valves let it return to where it was before it hit something.
I think you might find it well take a little longer with the 2" cyl. but does that really matter? I think the pump would work out for you. Oh by the way the strock is 10" just as yours are.


Lee Hope that helps...

 

[Iplayfarmer]

Iplyfarmer,

!st off your trailer is a lot bigger then I had in mind. Anyway the oildyne pump took a #2 stern drive up in 10sec. and down just alittle faster, but was real close to the 10sec.
That #2 drive cyl. are bigger on the out side from a #1 drive so would guess piston is no bigger then 1 1/2". Sten drive cyls. have a floating piston and a piston on the shaft and that one has check valves in it. The reason for that is when something is hit the check valves open, also the floating piston and other check valves let it return to where it was before it hit something.
I think you might find it well take a little longer with the 2" cyl. but does that really matter? I think the pump would work out for you. Oh by the way the strock is 10" just as yours are.


Lee Hope that helps...

Thanks big time for taking time out to do that test for me. That's good info.

 

[oldnslo]

Good questions.


2) I was wondering how that chart worked. Am I to understand, then, that the pump will work at a higher volume and lower pressure until it meets a greater load? That would be very nice if that is the case.

Yes that is how they work.

I do plan on using the trailer in the winter, but not much. Most of my trailering is in the spring and fall as I run around tilling gardens for friends and relatives. The pump I have is what I have, though. Is there something I need to be concerned about?

Never had one of these units apart so I don't know for sure. Only concern that I can think of thick fluid may not flow into the pump and cause it to cavitate. But this is a potential problem with any system. Isn't this just a big brother to the units used on snow blowers for chute control?

Roy