jas67
Platinum Member
I purchased the following pump:
22 GPM/650PSI for the first stage
Haldex Hydraulic Pump — 22 GPM, 2-Stage, Model# 1080035 | Pumps | Northern Tool + Equipment
To upgrade my log splitter, which currently has an 8HP Briggs engine
with an 8GPM pump. I have an "extra" 10 HP Yanmar single-cylinder air-cooled diesel engine that I plan to put this pump on.
Northern's website doesn't show an HP requirement for this pump, but
list the 11 GPM pump as requiring 5HP, and a 16 GPM pump requiring 8 HP.
These numbers match the formula that I found in several places of GPM
* PSI / 1500 = HP. 22 GPM @ 650 PSI (1st stage) gives me 9.53 HP. The 2nd stage of these pumps is 2500 PSI with a proportionaly smaller GPM rating, yeilding a similar, or less HP requirement as the 1st stage.
So, I purchased the 1057 pump shown above. Then I find this calculator on Surplus Center's website:
Burden Sales Surplus Center - Tech Help
22 GPM @ 650 PSI show 10HP needed to drive this pump. Great!
BUT -- then I read the comment on that page: "calculated for electric motors,double HP for gas powered motors".
This might explain why my splitter has an 8 GPM pump on an 8HP engine, instead of a 16 GPM one.
Now, after reading this, I'm having some doubt.
What are peoples' experiences with matching 2-stage pumps to gas/diesel engines?
Will my 10HP engine drive this pump OK.
I read some "customer comments" on Northern Tool's site where people run running their 11 GPM pump with 5 HP engines, so 22 GPM with 10 HP sounds doable.
Thanks,
Jay
22 GPM/650PSI for the first stage
Haldex Hydraulic Pump — 22 GPM, 2-Stage, Model# 1080035 | Pumps | Northern Tool + Equipment
To upgrade my log splitter, which currently has an 8HP Briggs engine
with an 8GPM pump. I have an "extra" 10 HP Yanmar single-cylinder air-cooled diesel engine that I plan to put this pump on.
Northern's website doesn't show an HP requirement for this pump, but
list the 11 GPM pump as requiring 5HP, and a 16 GPM pump requiring 8 HP.
These numbers match the formula that I found in several places of GPM
* PSI / 1500 = HP. 22 GPM @ 650 PSI (1st stage) gives me 9.53 HP. The 2nd stage of these pumps is 2500 PSI with a proportionaly smaller GPM rating, yeilding a similar, or less HP requirement as the 1st stage.
So, I purchased the 1057 pump shown above. Then I find this calculator on Surplus Center's website:
Burden Sales Surplus Center - Tech Help
22 GPM @ 650 PSI show 10HP needed to drive this pump. Great!
BUT -- then I read the comment on that page: "calculated for electric motors,double HP for gas powered motors".
This might explain why my splitter has an 8 GPM pump on an 8HP engine, instead of a 16 GPM one.
Now, after reading this, I'm having some doubt.
What are peoples' experiences with matching 2-stage pumps to gas/diesel engines?
Will my 10HP engine drive this pump OK.
I read some "customer comments" on Northern Tool's site where people run running their 11 GPM pump with 5 HP engines, so 22 GPM with 10 HP sounds doable.
Thanks,
Jay