AC 7010 Leaking Hydraulic Circuit Line

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I struggled to track this down but my 7010 PS leaks at high rpm from a diff lock line, the leak is at part numbers:
70930282 - Tee - 7/8 NF x 3/4 NF
 where it connects to steel line:
70268129 it has what looks like a sleeve under the nut.

Which appears to be a 3/8" line due to the 70921326 - 3/8" tube adapter on the other end.

These are on the right side if you are at the rear looking forward, theres a little valve block thing they thread into.  It took an hours of messing with and bending various wrenches but I got the flare nut on the tube tightened a half turn.  Now instead of a drip its a spray so I assume I've split the flare.

Is there any reason I can't replace this steel line with a rubber hose?  I'm assuming NF is just old time talk for a UNF 37 degree flare fitting.

Edited by slowzuki - 24 Jul 2018 at 11:01am

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
slowzuki Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 18 Dec 2014 Location: Canada Points: 60	Post Options Post Reply Quote slowzuki Report Post Thanks(0) Quote Reply Topic: AC 7010 Leaking Hydraulic Circuit Line Posted: 24 Jul 2018 at 10:35am
	I struggled to track this down but my 7010 PS leaks at high rpm from a diff lock line, the leak is at part numbers: 70930282 - Tee - 7/8 NF x 3/4 NF where it connects to steel line: 70268129 it has what looks like a sleeve under the nut. Which appears to be a 3/8" line due to the 70921326 - 3/8" tube adapter on the other end. These are on the right side if you are at the rear looking forward, theres a little valve block thing they thread into. It took an hours of messing with and bending various wrenches but I got the flare nut on the tube tightened a half turn. Now instead of a drip its a spray so I assume I've split the flare. Is there any reason I can't replace this steel line with a rubber hose? I'm assuming NF is just old time talk for a UNF 37 degree flare fitting. Edited by slowzuki - 24 Jul 2018 at 11:01am

Sponsored Links

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 22823	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 24 Jul 2018 at 11:14am
	JIC flare connection on a hose will be just fine as long as the hose diameter doesn't get too fat and in the way of lines next to it. Pressures are less than 1,000 psi.

allisrutledge Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 30 Mar 2010 Location: SurgoinsvilleTN Points: 1361	Post Options Post Reply Quote allisrutledge Report Post Thanks(0) Quote Reply Posted: 24 Jul 2018 at 11:14am
	Most of the time with flared fittings the line cracks right behind the flare caused by stress or vibration. If it is a flare fitting , There should be enough length to cut close and reflair. If it is the rubber bushing type ,cut and get new rubber sleeves.
	Allis Chalmers still exist in my mind and barns

slowzuki Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 18 Dec 2014 Location: Canada Points: 60	Post Options Post Reply Quote slowzuki Report Post Thanks(0) Quote Reply Posted: 24 Jul 2018 at 11:26am
	I'm not super familiar with the working with steel tubing larger than automotive size. Do you replace the JIC collar/sleeve between the nut and flare after cutting off the old? All my flare tools this size are rigid 45 degree gear for working with soft copper refrigeration/gas lines. Will take it in to the local shop.