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GV-I Hydraulic pressure and volume

F

flatheads & vacuum tu

Member
I am looking at a GV-I to carry my back-hoe attachment. I have read that there were several hydraulic systems available on the GV-I. The seller does not know which option they have. How do I tell the difference, and what is the pressure and volume of each?
 
GV1 hydraulics not great. Same as on G/704/705/6. Little capacity. Only know of one pump with flow divider for PS. Will be a
Webster number on pump. Gv1 is a Wheatland tractor.
 
(quoted from post at 14:45:30 03/21/22) GV1 hydraulics not great. Same as on G/704/705/6. Little capacity. Only know of one pump with flow divider for PS. Will be a
Webster number on pump. Gv1 is a Wheatland tractor.
Click to expand...
OK, the Wheatland tractors were also long wheel-base and needed 10 acres to turn, so I guess this is the wrong platform for my back-hoe. I have a Jet Star, but it is a bit too small for the back-hoe, so perhaps a M5?
 
5 Star,M5,M602,M670 basically all same. Hydraulics on back. All use similar hydraulics as GV1 or Jetstar. What's with amp and
vacuum tubes?
 
(quoted from post at 05:10:48 03/22/22) 5 Star,M5,M602,M670 basically all same. Hydraulics on back. All use similar hydraulics as GV1 or Jetstar. What's with amp and
vacuum tubes?
Click to expand...
I design and build audio amps for myself, guitar amps for my son, but the cool project at the moment is a vacuum-tube analog-computer for fuel-injection on a flathead Ford V8 on one of my hot-rods. I am using tubes which were available in the 40s, so the hot-roders of the time could have done it and I bet a couple of them did, but there was no internet to document it.

My Jet Star has the optional high-capacity hydraulic pump on the PTO, so I guess I will need to retrofit that to any MM I decide to use.
 
Same Jet pump will mount on side or back of M5. Am electronics tech by trade. Repaired few amps over years. Built our own in
college in 70's.
 
I have a 335 industrial Minneapolis moline with a factory backhoe & loader on it. It will handle a
40 inch bucket on the backhoe with no problems so your jetstar would handle a backhoe OK if it had
a front loader one it. The problem would be that the factory pump on it won't be enough GPM to
operate the backhoe fast enough. They used a larger pump for the backhoe, even on the 335.
 
(quoted from post at 20:53:07 03/22/22) I have a 335 industrial Minneapolis moline with a factory backhoe & loader on it. It will handle a
40 inch bucket on the backhoe with no problems so your jetstar would handle a backhoe OK if it had
a front loader one it. The problem would be that the factory pump on it won't be enough GPM to
operate the backhoe fast enough. They used a larger pump for the backhoe, even on the 335.
Click to expand...
mvphoto89758.jpg

My Jet Star has the optional 2nd pump on the PTO. Is this the same as your 335 Industrial?
 
335 has what appears to be a similar pump as yours but it is mounted on the rear where I assume
your pump for the 3pt & maybe steering is located. 335 steering pump is mounted on back of main
pump. What is that pump on your jet used to run?
 
(quoted from post at 09:30:55 03/23/22) 335 has what appears to be a similar pump as yours but it is mounted on the rear where I assume
your pump for the 3pt & maybe steering is located. 335 steering pump is mounted on back of main
pump. What is that pump on your jet used to run?
Click to expand...
That pump powers my front-end loader, and does a good job.
 
My Jetstar 3 Ind has a Vickers pump on rear and steering pump on crankcase cover. 600 has side pump for loader and B13 back-hoe.
Both had reservoir in loader frame.
 
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