mrmikey
Veteran Member
I may have been looking at that pic wrong? If the bottom gear, driver, is turning CW then the suction should be on the left, driver side.
Hydraulic Help
- Thread starter Scott Y
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LD1
Epic Contributor
Looking at his pic....if the suction is the right in the pic, and the driver is bottom, it is plumbed correct. He has a suction/prime problem
mrmikey
Veteran Member
Agree, once I relooked at the pic I realized the driver was the bottom where I first thought it was the top, or at least looks like it...........Mike
ptsg
Super Member
I really doubt it's a suction or prime issue, unless the suction line is pinched somewhere around the route from the tank to the pump or something inside is blocking the line. Specially with the tank clearly sitting above the pump, that will prime itself just by pouring fluid on the tank.
Heck, I'm running the two pumps on my backhoe 6" above the tank and surely 10 to 12" above the fluid level, using an undersized suction line with a bunch of tight 90 degrees fittings and it works just fine, no problems at all with the flow.
Heck, I'm running the two pumps on my backhoe 6" above the tank and surely 10 to 12" above the fluid level, using an undersized suction line with a bunch of tight 90 degrees fittings and it works just fine, no problems at all with the flow.
LouNY
Super Star Member
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- Jul 4, 2015
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- 12,358
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- Greenwich, NY
- Tractor
- Branson 8050, IH 574, Oliver 1550 Diesel Utility (traded in on Branson) NH 8160. Kioti CK2620SECH
Do you have a suction filter on the system,
or a screen in the suction line.
Filters are hard to pull through.
or a screen in the suction line.
Filters are hard to pull through.
mrmikey
Veteran Member
What kind of flow do you get if you remove the suction line from the pump? The tank being above the pump, the oil should run freely out of the line.
While you have the line off, have a look inside the pump, you should be able to see the gears to check for actual rotation and correct direction of rotation. If you can, get a small hardwood stick to make contact with the gears, see if you can rotate them (engine off obviously) to check that there is actually a keyed connection from the input shaft to the driving gear. It's not unheard of to be missing parts from even new equipment, crap happens when humans are involved.
It's an extremely simple setup, I can't really see what the problem would be, it's got to be something extremely simple that we'll all kick ourselves in the butt for not seeing it
.............Mike
While you have the line off, have a look inside the pump, you should be able to see the gears to check for actual rotation and correct direction of rotation. If you can, get a small hardwood stick to make contact with the gears, see if you can rotate them (engine off obviously) to check that there is actually a keyed connection from the input shaft to the driving gear. It's not unheard of to be missing parts from even new equipment, crap happens when humans are involved.
It's an extremely simple setup, I can't really see what the problem would be, it's got to be something extremely simple that we'll all kick ourselves in the butt for not seeing it
.............MikeThanks For all the Great replies, I did hook everything up and then fill with oil, the suction line is suction rated , good point on filling the suction line with oil, but I believe I am past that now, last night , hooked a pressure gauge up to a remote, 0 psi, so I unhooked the inlet to the valve (outlet from the pump) put thumb over end of hose and started tractor, it did build pressure , not sure if enough, but made a mess of sprayed oil on tractor, so then unhooked return line going to the reservoir, nothing coming out, a very light dribble, so this leads me to say the pump, if the pump was working but the valve wrong or closed position, the pump would build so much pressure a line would blow or stall the tractor, tonight I am going to hook up a flow meter between pump and valve (borrow from work), and see what I get, I assume zero to very very low gpm. I am (after the fact) concerned about the length of the suction line as well, but system should still work, when I get this working, I will probably bump up the ID size of the suction hose , but later on. Facing the front of the tractor the shaft/coupler rotates CW , so I ordered a CCW pump, that has to be correct? but sure seems like it must be the pump rotation is backwards, plumbing is correct, inlet is 1" outlet is 3/4. Thanks Guys. more to come yet.
Mike, Good points, tonight In addition to measuring flow, I will remove the suction line and see what I have for flow coming out of it, yes who knows, could be an obstruction or similar, I will also check the pump out like you stated, Good to have guys to throw some options at me, yes it is a very simple system , that should be working. Thanks Guys!
