Lift arms rising by themselves

Posted by John Lloyd on August 10, 2007 at 16:11:02 from (86.138.187.29):

I'm using a tractor with a TPH mounted implement basically for the first time ( an Universal 445DT sold as a Long445 or Allis 5045 in USA ) & running a 5 ft Rhino topper similar to a Bush Hog with a rear castor wheel.
I've selected position control & set the TPH arms for a suitable height to cut very thick 3 ft high rushes & positioned the stop so I can get back to that height after raising the topper. I start to cut at about 3 mph but I find after 100yds or so the arms are starting to lift by themselves, so I have to hold the TPH lever down against the stop continuously. The land is basically flat, but it seems that the tussocks of rushes each push the arms a little higher until after 1-200yds the rear wheel is completely off the ground & the topper will continue to rise to max height.
Is this normal? I had assumed that once set to a height the lift arms would stay put? What should I set out to check if it does represent an issue with the hydraulics?

Replies:

• Re: Lift arms rising by themselves KEH 17:17:18 08/10/07 (1)
  • Re: Lift arms rising by themselves John Lloyd 00:53:17 08/11/07 (0)

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]