Hydraulic Pump Nomenclature

[AMEGHD]

Recently I purchased a 1993 Swinger 200 Articulating Loader. The hydraulic pump for the steering, loader & auxiliary is a Borg Warner S20S12AH11R. I believe this is a 12 gpm pump. I would like to replace this with a 20 gpm pump in order to drive a 6' JRW snow blower. Any information about the mounting configuration and input shaft would be greatly appreciated. Also, if anyone has had direct experience with up sizing the pump on one of these machines would be interesting to hear about. Thanks!

 

[mrmikey]

No experience with your particular configuration but are you going to have the HP to power the pump?. If the machine was origonally sized for 12 gpm I doubt if you'd be happy trying to run a 20gal pump....Mike

 

[AMEGHD]

Thanks for your reply Mike. Since my post I received a copy of a sales brochure from a former dealer. Good news the brochure lists the hydraulics capacity as 24gpm/2000psi @ 2800 rpm. The motor I've selected (7.63 cu in) requires 18gpm for 540rpm which should be achievable at a 2100rpm. Should have the motor in a week. I'll check the no load speed before fabricating mounts and post the results.

 

[J_J]

How much HP do you have?

The 18 GPM pump at 2000 psi will require about 25 HP.

 

[Farmerford]

AMEGHD:

I am curious about how you plan to divide your hydraulic flow. I assume you have a fixed displacement pump and open center valves; a priority flow divider probably sends the first 2-3 gpm to the steering cylinders, leaving 17 -18 gpm for the loader. If the loader cylinders are to be used while the blower is operating you will need to consider what happens if the cylinders cut off all or a substantial amount of flow to the blower while the blower is spinning (I assume the cylinders will be upstream of the blower). The inertia of the motor, shaft, couplings, gearbox, and impeller will tend to make the motor keep spinning even though fluid flow has been reduced. There are several options if that turns out to be a concern.

Send us pictures.

 

[AMEGHD]

AMEGHD:

I am curious about how you plan to divide your hydraulic flow. I assume you have a fixed displacement pump and open center valves; a priority flow divider probably sends the first 2-3 gpm to the steering cylinders, leaving 17 -18 gpm for the loader. If the loader cylinders are to be used while the blower is operating you will need to consider what happens if the cylinders cut off all or a substantial amount of flow to the blower while the blower is spinning (I assume the cylinders will be upstream of the blower). The inertia of the motor, shaft, couplings, gearbox, and impeller will tend to make the motor keep spinning even though fluid flow has been reduced. There are several options if that turns out to be a concern.

Send us pictures.

J_J

The hp rating is 54 @ 2600rpm (110 ft lb torque @ 2100rpm)which should work out to about 44hp @ 2100rpm. I agree the pump will take about 25hp which leaves 19hp to power the hydrostatic drive. Fortunately the snow blower pushes easily up to about 8" of snow or when going through a snow bank (end of driveway). I'll adjust the travel speed to suite conditions.

Farmerford

I agree using the loader cylinders will impact the flow available to the blower motor. All three valves are in a common valve body. Movement of the loader will be done sparingly or may have to increase engine speed. The blower will be mounted on pivots with a top chain and there by can float during normal operation. I'll wait for the chute to clear before making a quick lift (similar to operation with pto before disengaging the clutch) such as for turning around or raising to cut off the top of a snow bank.

I do plan to post photos of the fabrication of mounts, final set and in operation.

Thanks for the input!

 

[CJONE]

J_J

The hp rating is 54 @ 2600rpm (110 ft lb torque @ 2100rpm)which should work out to about 44hp @ 2100rpm. I agree the pump will take about 25hp which leaves 19hp to power the hydrostatic drive. Fortunately the snow blower pushes easily up to about 8" of snow or when going through a snow bank (end of driveway). I'll adjust the travel speed to suite conditions.

Farmerford

I agree using the loader cylinders will impact the flow available to the blower motor. All three valves are in a common valve body. Movement of the loader will be done sparingly or may have to increase engine speed. The blower will be mounted on pivots with a top chain and there by can float during normal operation. I'll wait for the chute to clear before making a quick lift (similar to operation with pto before disengaging the clutch) such as for turning around or raising to cut off the top of a snow bank.

I do plan to post photos of the fabrication of mounts, final set and in operation.

Thanks for the input!

Just to add to farmers reply, how do you know that the existing valves and flow dividers will handle the added flow? I would check before upsizing the pump. Another option would be to add a piggyback pump with it's own seperate circuit for the blower. If you go that route be sure you have enough cooling with the existing system. The seperate pump could be belt driven also, even with a 12v clutch to be disengaged when you are not useing it. Just some different ways that I have done over the years. CJ

 

[AMEGHD]

Just to add to farmers reply, how do you know that the existing valves and flow dividers will handle the added flow? I would check before upsizing the pump. Another option would be to add a piggyback pump with it's own seperate circuit for the blower. If you go that route be sure you have enough cooling with the existing system. The seperate pump could be belt driven also, even with a 12v clutch to be disengaged when you are not useing it. Just some different ways that I have done over the years. CJ

Since my original posting I obtained a brochure from a former dealer. The specifications lists the hydraulic capacity as 24gpm/2000psi @ 2800rpm. If the info is correct then the rest of the system should be capable of handling the flow. To be sure, I plan on connecting the motor then test for pressure and rpm. Based on the results I'll either complete the installation or step back to evaluate options. I should know by the end of the week.

 

[CJONE]

Since my original posting I obtained a brochure from a former dealer. The specifications lists the hydraulic capacity as 24gpm/2000psi @ 2800rpm. If the info is correct then the rest of the system should be capable of handling the flow. To be sure, I plan on connecting the motor then test for pressure and rpm. Based on the results I'll either complete the installation or step back to evaluate options. I should know by the end of the week.

I looked your pump up and if your p/n is correct and it looks like it is, it is a 1.45 CUI so at 2000rpm you will have about 11.5 gpm actual. At 2800 rpm you will have 16 gpm actual. You could jump to a 2.0 or 2.1 cube and that would get you in the 22-23 GPM range. Hope this helps. CJ
Oh sorry it looks to be a sae A mount, 13 spline, side port also.

 

[Swinger_Parts_4_Sale]

Hello,
I stumbled onto your post about looking for swinger loader parts or information if you are still needing parts feel free to send me a message, I may be able to help you. I used to work for the company that manufactured the Swinger loaders before they were discontinued and obtained a lot of the information, build sheets, material list, vendor/supplier information and lots of other stuff. I am currently in the process of having some of the more common parts & obsolete parts reproduced based off original drawings & specifications.