Just recently installed a front pump on my 8n to run my loader and remotes and live hydraulics. The pump was a old vickers i picked up at a auction with some other stuff cheap. It operates the loader quicker than the internal pump did but doesnt lift as well. The internal would lift a full bucket no problem. The front pump seems to struggle. Im wondering if anyone has any suggestions on a replacement pump. It will mostly be powering my loader but i will also run my splitter off the remotes.
- Thread starter kev518n
- Start date
shaun wallace
Well-known Member
There is Vickers p/n stamped near output port on machined surfaced. It will start with V20/10 followed by series of digits.
TheOldHokie
Well-known Member
- Location
- Myersville, MD
I have had very good luck with the Dynamic gear pumps from Surplus Center. Inexpensive and available in a wide variety of form factors and displacements....
Dynamic Gear Pumps
TOH
Indiana George
Member
Hi TOH so how do you figure on what pump to use?I have a NAA thats needs the front loader pump.Old one does not work anymore.Do you have a model number from surplus center that would fit the NAA? Thanks
TheOldHokie
Well-known Member
- Location
- Myersville, MD
You don't need anything special for a front end loader pump on the NAA. I would suggest something with a flow rate in the range of 8-10 GPM @ 2000 RPM. Assuming it is shaft driven off the engine crankshaft pully you need one that operates with counter-clockwise rotation. The Dynamic pumps I linked are SAE standard pumps and SAE-A form factor pumps with keyed shafts have a 5/8" shaft with a 5/32" key which is where you will start running into issues. My guess is your old pump has a 3/4" shaft with 3/16" key so your flexible coupler will need to be modified or replaced. The ANSI standard for 5/8" shafts is 3/16" keyway and just about every OTS shaft coupler you can find will have a 3/16" keyway in it. What I do is use one of the $24 chain couplers from Surplus center and broach a 5/32 keyway opposite the existing 3/16" keyway in the pump half of the coupler. Depending on how the old pump was mounted you may also need some sort of mounting foot for the new pump. Here is what I would use:
[u:73de96abb5]Chain Coupler[/u:73de96abb5]
[u:73de96abb5]Pump Mounting Foot[/u:73de96abb5]
[u:73de96abb5]1.22 CID Dynamic gear pump[/u:73de96abb5]
I can supply any or all of that but obviously with additional shipping and machining charges it would be a bit more than purchasing it direct from Surplus Center. Still a very inexpensive replacement for your old pump.
TOH
Indiana George
Member
Hello TOH ,thanks for the information and mine is shaft driven off the crankcase.I think I'll order that pump from surplus center Thanks again George
TheOldHokie
Well-known Member
- Location
- Myersville, MD
Step keys are fine for adapting keyways when the shaft and bore are the same size. You just get the strength of the narrower key.
They are not nearly as good when you are trying to sandwich a bore reducing sleeve in the middle. You get a lot of longitudinal twisting action on the key when its under load. That usually wallows out both keyways in short order. My advice is do it right. Use a coupler with the proper bore and keyway and save yourself the expense of a damaged pump shaft down the line.
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
(quoted from post at 23:30:43 03/03/17)
I have used quite a few of that exact same model pump and never had a problem of any sort. I can't see the arrow very well in your picture but I can see what looks like the the last character of the Dynamic part number which should be GPF2025PA (A = anti-clockwise). Remember - pump rotation is defined when looking at the pump from the front. Looking at the shaft end of the pump the arrow should point to your left and the larger suction port should be on your right.
TOH
looking at the shaft end the arrow is pointing to the right. I will look when I get back home but I'm pretty sure the suction lime was on the left.(quoted from post at 06:19:20 03/04/17)(quoted from post at 23:30:43 03/03/17)
I have used quite a few of that exact same model pump and never had a problem of any sort. I can't see the arrow very well in your picture but I can see what looks like the the last character of the Dynamic part number which should be GPF2025PA (A = anti-clockwise). Remember - pump rotation is defined when looking at the pump from the front. Looking at the shaft end of the pump the arrow should point to your left and the larger suction port should be on your right.
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
(quoted from post at 14:17:46 03/04/17)looking at the shaft end the arrow is pointing to the right. I will look when I get back home but I'm pretty sure the suction lime was on the left.(quoted from post at 06:19:20 03/04/17)(quoted from post at 23:30:43 03/03/17)
I have used quite a few of that exact same model pump and never had a problem of any sort. I can't see the arrow very well in your picture but I can see what looks like the the last character of the Dynamic part number which should be GPF2025PA (A = anti-clockwise). Remember - pump rotation is defined when looking at the pump from the front. Looking at the shaft end of the pump the arrow should point to your left and the larger suction port should be on your right.
TOH
OK - I enlarged your image and can see things a bit better. It certainly looks like the part number on the pump housing has been re-stamped by someone. The original part number was GP-F2020-P-C which would be a clockwise pump and matches the arrow engraved on the pump. Someone has struck an "A" over the "C" in the original part number. That is very suspicous and I would be worried it is a customer return that someone has messed with.
If the outlet port is on the left when viewing the pump from the shaft end (and I am guessing it is) that is a clockwise pump as indicated by the arrow on the body. AFAIK these pumps are not reversible. My advice is call Burden's customer support and explain the situation to them. I have only had a couple problems with items I purchased from them and they have always been very good at correcting the problem at their expense.
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
Here is a picture of a GPF2020PC I purchased last week.
TOH
Yeah the suction port is on the left when looking at it from the shaft side with part number facing up. Im going to give them a call monday and see what they say. kinda a bummer cause i wanted to get it installed this weekend and try it out. although i did get quite a bit of dirt moved today with the old vickers on there. works just weak. Its got volume just not good pressure under a load. Thanks for the info.(quoted from post at 13:22:13 03/04/17)(quoted from post at 14:17:46 03/04/17)looking at the shaft end the arrow is pointing to the right. I will look when I get back home but I'm pretty sure the suction lime was on the left.(quoted from post at 06:19:20 03/04/17)(quoted from post at 23:30:43 03/03/17)
I have used quite a few of that exact same model pump and never had a problem of any sort. I can't see the arrow very well in your picture but I can see what looks like the the last character of the Dynamic part number which should be GPF2025PA (A = anti-clockwise). Remember - pump rotation is defined when looking at the pump from the front. Looking at the shaft end of the pump the arrow should point to your left and the larger suction port should be on your right.
TOH
OK - I enlarged your image and can see things a bit better. It certainly looks like the part number on the pump housing has been re-stamped by someone. The original part number was GP-F2020-P-C which would be a clockwise pump and matches the arrow engraved on the pump. Someone has struck an "A" over the "C" in the original part number. That is very suspicous and I would be worried it is a customer return that someone has messed with.
If the outlet port is on the left when viewing the pump from the shaft end (and I am guessing it is) that is a clockwise pump as indicated by the arrow on the body. AFAIK these pumps are not reversible. My advice is call Burden's customer support and explain the situation to them. I have only had a couple problems with items I purchased from them and they have always been very good at correcting the problem at their expense.
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
That surprises me. Did you tell him the ports are backwards?
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
I just fired of a question to Dynamic Technical Support. I suggest you sit on that pump until I get a response for you.
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
I still haven't got an email response - will call them if I don't get one soon.
AFAIK all Vickers vane pumps are field reversable - simply turn the rotor housing around. AFAIK the Dynamic gear pumps are not and that is typically an advertised feature on any pump that can be reversed.
Every clockwise GPF10/GPF20 pump I have ever received had the inlet on the left, the counter-clockwise ones on the right. I've seen dozens of them and never seen one that wasn't like that. I even double checked the two I just purchased to make sure that hadn't changed. Maybe it can be done but that pump looks fishy to me.
TheOldHokie
Well-known Member
- Location
- Myersville, MD
I talked with a Dynamic technician and he says the pumps are reversable and that they sometimes convert them at the factory if they don't have what they need on the shelf. Doing it in the field voids the warranty on the pump so they don't advertise the feature.
When they reverse a pump they re-stamp the last character of the part number. They also flip the gears and shafts and rotate the body top to bottom which also reverses the porting. That means the stamped serial and part numbers should be on the [u:71d218f687][b:71d218f687]bottom[/b:71d218f687][/u:71d218f687] of the pump when you are looking at the shaft end. Is that what you have in front of you?
TOH
TheOldHokie
Well-known Member
- Location
- Myersville, MD
The pump can be rotated to any position you want. The only issue is clearance - it is not symmetric top to bottom.
TOH
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