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Lift Valve Adjustment

Discussion in 'Western Plows Discussion' started by 1978K20, Dec 28, 2005.

  1. 1978K20

    1978K20 Junior Member
    Messages: 22

    I just installed a backdrag scraper that I fabricated. The weight increase
    will not let the plow raise all the way up. Almost, but not quite.

    So, I tried to adjust the lift valve, (this is an old western cable operated
    unit I bought used over 15 years ago). I can't get the valve to move.
    I removed the set screw lock from the top. The valve itself won't budge.
    The check valve at the back moves freely, but not the lift valve in front.

    Anyone ever have this problem ? :realmad:

    Help, please ?:cry:

    western pump.JPG
  2. 78W200

    78W200 Member
    Messages: 62

    I don't think adjusting the lift valve will solve your prob. You may need to adjust the pressure relief valve on the pump itself. The relief valve is where you get your pressure increase for the added weight. Be careful not to get too carried away turning it though, if you go too much you will start blowing the oring out of the bottom side. 1/4 of a turn gives you 200-225 psi increase, with 1650-1850 psi being the normal range.
  3. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    I agree with 78W200, however i believe the say to to make 1/8 turns at a time you can go to Westerns web site and find the adjustment process.
  4. #1 plowtech

    #1 plowtech Senior Member
    Messages: 253

    i agree w/ other replys,but if need be to ever adjust lift valve,i see you have the old steel lift valve. you can try an impactscrew driver that you hit w/ a hammer. fyi the newer style valves are plastic but they still seize in housing.
  5. kevs75

    kevs75 Junior Member
    Messages: 15

    I just went through this a couple weeks ago because I had to adjust the lift valve on mine. I sprayed pb blast down the hole where the set screw goes and at the front of the lift valve and let it soak for awhile. The impact screwdriver wouldnt budge it so I took a cheap wide blade screwdrive and hit the top of it a couple times with a hammer and then used a open end wrench to turn it. It finally loosened up and then I installed a new valve with anti seize. You'll probly have to take the pump off and put it on the bench to get good leverage but I would adjust the pump pressure first.
  6. 78W200

    78W200 Member
    Messages: 62

    The 1/8 turns are for the adjustment on the lift valve. The pump relief valve is 1/4.
  7. 1978K20

    1978K20 Junior Member
    Messages: 22

    I called a western rep today.........

    and he told me I have to drain the fluid ( just changed it 2 days ago),
    remove the motor, and then I can make an adjustment to the pump
    pressure switch on the pump itself (down inside the case). He said to
    turn the adjustment in 1/8 at a time. He also said that I may have to remove
    the pump to make the adjustment. What a major pain !! :cry:

    I mentioned that I tried to make an adjustment at the lift valve on the
    front of the case, but it won't budge. He told me that making an adjustment there wouldn't help me. What the ?

    So how do I adjust the pump pressure ? :confused:

    I think I'm going to spray some more rust buster on the lift valve and try
    to break it loose. :gunsfiring:
  8. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    Drain the fluid into a container and reuse it it only takes about 5 min. to remove the pump 10 - 15 min total to do the adjustment and refill.
  9. 1978K20

    1978K20 Junior Member
    Messages: 22

    Pump pressure adjusted

    Today I attached a pressure gauge, and checked my pump pressure.
    1100-1200 lbs ! No wonder the blade was slow and not going all the
    way up. I drained the fluid, removed the motor ( managed to snap off
    the pos lead stud ), and removed the pump. What I found was a stainless screen (looked good, clean too). I read at the western site 1/4 turn
    on pump is equal to about 250 lb increase. So just to play it safe, I turned
    the valve in 1/2 turn. Drove to dealer and bought a new "O" ring for bottom
    of pump, new cork gaskets for motor, and a new aftermarket motor. This
    motor is made in china. Didn't want it, called another dealer for an
    American made motor. Was told western doesn't have a motor for my
    Mark III. Dealer told me only way to get a motor from western for my
    set-up is to also buy a later style pump & motor assembly. Didn't make
    me happy. Back to 1st dealer to buy china motor. :realmad:

    Got home, installed new parts, checked pressure (1500 +). Could have
    adjusted for a little more pressure, but at this point I was into this 6 hours!
    I hooked the lines / chain back up and tried it. Reaches full lift in about
    3 1/2 seconds. Good enough for now. I thought I'd share my adventure
    today with everyone. :D

    I'm ready for some snow!! :gunsfiring:

    Have a happy new year ! :drinkup: