Haldex
Haldex Hydraulic Pump - 28 GPM, 2-Stage, Model# 1080036
Hydraulic Pump good deal,
November 18, 2008
By craig1696 from Philly, Pa
"Nice looking and fit the mounting bracket well and shaft fit a lovejoy coupling.
Built a logsplitter with a 18 hp engine. Works good no problems."
What is your level of technical expertise? Professional
Haldex
Haldex Hydraulic Pump - 28 GPM, 2-Stage, Model# 1080036
28GPM Haladex Pump,
October 26, 2008
By askgyfwier from MAttoon, Illinois
"These
pumps work well. I have had them for several years without problems of
any kind. The shift from Hi to Low flow is reliable and repetable and
works as advertised. Recommended. The stated flows are at 3600 RPM
input."
What is your level of technical expertise? Professional
1 of 1 people found this review helpful.
Haldex
Haldex Hydraulic Pump - 28 GPM, 2-Stage, Model# 1080036
Non-Standard Application,
May 14, 2008
By BigWillie from Chicago IL
"I used this pump in the hydrostatic propulsion system of my large-scale Diesel locomotive. The theory behind this application is that the combination of this pump with series-connected hydraulic motors—which rotate a fixed amount per unit of oil flow—will behave like an automatic transmission. When starting the train from standstill, the loading on the propulsion system causes the pump to operate in the high pressure, low flow mode, resulting in high starting torque at the wheels. As the train accelerates and the load on the propulsion system decreases, the pump shifts to the low pressure, high flow mode, an effect analogous to shifting into a higher gear, resulting in higher train speed. When a relatively steep upgrade is encountered, the additional load causes the pump to revert to the high pressure, low flow mode, giving the locomotive the extra pulling power needed to keep the train moving.
Theory was borne out in practice. I did have to add an accumulator to the system to soften the effect of the pump switching between modes as loading changed on grades. Otherwise, the pump has behaved in a consistent manner, and has proven to be trouble-free."
What is your level of technical expertise? Home Handyman
2 of 2 people found this review helpful.
Haldex
Haldex Hydraulic Pump - 28 GPM, 2-Stage, Model# 1080036
2 stage pump,
April 15, 2008
By Qualitywoodman from Puyallup, WA
"I have used this pump in my firewood processor for over 20 years, the last one lasted about ten years. It is a great pump, requiring no maintenance."
What is your level of technical expertise? Professional
1 of 1 people found this review helpful.