Farm Equipment - 7030 pd trans.

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7030 pd trans.

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=139541
Printed Date: 29 Aug 2025 at 11:22am
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Topic: 7030 pd trans.

Posted By: Ed&Sherry
Subject: 7030 pd trans.
Date Posted: 18 Jun 2017 at 4:11pm

friend stopped in,asked why his 7030 with a pd locked up while in hi, but he shifted to low and it seemed alright,,is it just a matter of time and lo will also lock up ?

Replies:

Posted By: MACK
Date Posted: 18 Jun 2017 at 6:47pm

No, two shafts seized to gather in front of transmission. MACK

Posted By: Lynn Marshall
Date Posted: 18 Jun 2017 at 10:01pm

Are you talking about the high low range lever on the right hand side or the power director buttons on the floor?

Posted By: wayneIA
Date Posted: 19 Jun 2017 at 3:10am

If the power director shafts seized together then it wouldn't turn in high or low. Did the high low range lock up, or the power director lock up in high. The power director only locking on one side, I wouldn't know off hand how that could happen unless the two driven hubs in the clutch pack got messed up. I haven't had the range portion apart before to know how that works for sure to offer any guidance there.

Posted By: DrAllis
Date Posted: 19 Jun 2017 at 7:22am

Most of the time, when the Power Director shafts weld themselves together, the low side shaft twists off. So, when you drive the tractor, it is always in high range regardless of where the buttons are placed....... been there...dun that.

Posted By: Ed&Sherry
Date Posted: 19 Jun 2017 at 9:47am

asked more ? ,,,he says the lever in HI locks up trany,,,lever in LOW can use just fine and both buttons work in low

Posted By: DrAllis
Date Posted: 19 Jun 2017 at 10:00am

Range transmission seizure. Complete teardown of the rear end and torch the gear off of the pinion shaft...a pretty big deal.

Posted By: SteveM C/IL
Date Posted: 19 Jun 2017 at 10:01am

Not sure what "locks up trans" means...that range shift is in the rearend behind the transmission.Sounds like somehow the range gets caught in both hi & lo when in hi position.

DrAllis,what causes shaft welding in PD's?Low oil?

Posted By: Ed&Sherry
Date Posted: 19 Jun 2017 at 10:24am

will a 7060 rear bolt up to a 7030?

Posted By: DrAllis
Date Posted: 19 Jun 2017 at 10:32am

Will bolt right up, but maybe a couple of hydraulic lines are different. Must be a Power Director 7060 to get correct gearing. Power Director transmission hollow input shafts that seize together can be bearings getting loose from wear and low oil or combination of the two. Range trans seizure is different and doesn't happen a lot but is catastrophic when it does occur.

Posted By: MACK
Date Posted: 19 Jun 2017 at 9:35pm

Dirty oil is a big cause for both PD and range gear to seize. Never saw either to happen on any ones tractor that kept oil clean. Fill tube loose in range transmission can get a lot of dirt in one. Operator pulls dipstick, tube comes out and dirt that is piled up around tube falls in. Plus there is a gallon of oil in range transmission that don't drain out when drained unless you suck it out through fill tube. MACK