marlin54

Member
Trying to add power steering to my Farmall M using a Behlen gear box and Live pump on the Distributor flange with a separate
reservoir . my question is on the pump and gear box ...is the Large ports the supply..and small ports the return lines ?
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Generally, large port is the return line.

On my 450's Behlen motor, the small port is supply from the priority valve and the large line returns to the reservoir.


Chris B.
 
on pump , suction is a bigger hose . pressure is smaller hose. from what i can see on that oil tank you have a 1/2 hose. that should be at a least 1" hose from tank to pump suction .
even those spark plugs wires appear to be carbon core automotive type, not correct.
 
(quoted from post at 03:36:15 06/29/18) on pump , suction is a bigger hose . pressure is smaller hose. from what i can see on that oil tank you have a 1/2 hose. that should be at a least 1" hose from tank to pump suction .
even those spark plugs wires appear to be carbon core automotive type, not correct.

I'm going to be doing the same thing to my 39 M one of these days. I have had the tractor in my shop since last Thanksgiving, just have not taken time to install the power steering. The larger port on the pump is suction and 1/2 inch hose is just fine. The Behlen power steering pump is only a 3 gpm pump. The smaller port on the pump is output/pressure that goes to the steering unit. I have a PS unit with built-in reservoir. Should look nice and clean when I'm done,
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Yes the wires were on it when I got it and need to get rid of them . I bought a reel of 7 mm Solid copper wire years ago and make my own wire sets.
Just a note..if you ever put one on a M...and you did not have the Upright distributor, you would find the cap just touches the oil breather on the side of block and you can't get the wires on # 4 . Since I checked out the distributor when I had it off and it was recently rebuilt .. I wasn't going to change it. so a little tap in the right spot on the breather and it clears the cap now.
 
your pump is nice as it does not need a tank!. I read that they should never get over 180 in temp. or it might damage unit. I wasn't sure I could get away with out a tank..so I went with a tank to be sure..,... so your priority valve has the supply/inlet port getting fluid from the small port { pressure } from the pump... ..then you have the 2 outlets on the valve ...one is CF constant regulated flow at no more than 1,000 psi.going to the big port { inlet } on the gear box and then the other port from Valve is extra that dumps back into tank...and then the small port from the gear box returns to the tank ?
 
Chris ...I thought the large ports on the pump were the supply coming in from tank...and small ports were normally pressure going out. I must have it backwards then..
 
Maybe Im mixed up...So @ pump... I have the supply line coming from the tank going to the bigger port on the pump..{ inlet ] and the smaller port on pump going to feed the priority valve. so then is the gear box the same? Being the larger port is the inlet being feed from the priority valve ....and small port on gear box return to tank. ?
 
If your pump has the inlet as the large port ...and small is pressure going out ....then why is the motor not the same with the supply { inlet } from valve going to large port in gear box and the small port on motor returning to tank..so your saying the pump inlet is large port...and on gear box the inlet is the small port?..not the large port like pump?..
 
I'm confused, you talk about hooking up a priority valve. With that Behlen pump you do not need a priority valve. That pump only pumps about 3 GPM. The small port from the pump (High Pressure) goes to the small port on the power steering unit. The larger ports are return (low pressure oil).
 
I'm confused, you talk about hooking up a priority valve. With that Behlen pump you do not need a priority valve. That pump only pumps about 3 GPM. The small port from the pump (High Pressure) goes to the small port on the power steering unit. The larger ports are return (low pressure oil).
 

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