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Subject: Knocking in Hydrolic Pump Area

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Charles (N.C.)    Posted 10-02-2017 at 10:20:26 [URL] [DELETE]        [Reply] [No Email]  
  • Knocking in Hydrolic Pump Area
  • I know this has been discussed before but I can't recall this.A little history,,I've been into the hydrolics (3)times and golly,,I see no issues about the pump.Before pulling I went through watching the pump area in action and no issues that I could tell.I've refurbished the ram cylinder area because of wear.The lift works but here's the question,,knocking from the pump area.Using the Ford I&T repair manual I find nothing (parts) I can call that need repair.I'm sure one can tell the pump is a foreign animal too me.For your help I thank you.

    K.LaRue-VA    Posted 10-02-2017 at 13:36:23 [URL] [DELETE]        [Reply] [Email]  
  • Re: Knocking in Hydrolic Pump Area
  • The hydraulic pump pistons are operated by cams and cam blocks that the PTO shaft passes thru. When new, the PTO shaft turns the cams, and push the pistons in and out, without making noise. As those cams and cam blocks wear, more and more clearance means they start knocking. They can knock pretty loud under load for a long time and still work just fine.

    r geiger    Posted 10-02-2017 at 12:42:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Knocking in Hydrolic Pump Area
  • One of my 8ns has pump knock when under high pressure, it has for 15 years and is still pumping away.

    clayton ingmire    Posted 10-02-2017 at 12:12:35 [URL] [DELETE]        [Reply] [Email]  
  • Re: Knocking in Hydrolic Pump Area
  • is it low on fluid? or does it have a plugged filter somewhere in line water in fluid? just some thoughts

    Charles (N.C.)    Posted 10-02-2017 at 12:53:40 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Knocking in Hydrolic Pump Area
  • No water in "new fluid" and yes I'm lifting a "heavy" disc.My other 5 don't do this course one of these won't lift.Dang it.

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