Farm Equipment - XT 190 Hydrolic pump

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XT 190 Hydrolic pump

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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=42391
Printed Date: 28 Jun 2024 at 10:30pm
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Topic: XT 190 Hydrolic pump

Posted By: mark vaughn
Subject: XT 190 Hydrolic pump
Date Posted: 19 Dec 2011 at 9:59pm

Can someone explain the difference in the early model and late model XT 190 hydrolic pumps and which pump is better.

Replies:

Posted By: mark vaughn
Date Posted: 19 Dec 2011 at 11:08pm

Can you help me on my question DR ALLIS.

Posted By: DrAllis
Date Posted: 20 Dec 2011 at 6:30am

The original design pump was a triple section gear type (three pumps stacked together as one). One section for the 3pt and remote outlets.....one for power steering AND Power Director (hand clutch) and if equipped, the hydraulic PTO clutch. The last and smallest section was for the Traction Booster weight transfer system that worked thru the 3pt hitch arms only. Performance was very good even at low engine speeds because each pump was independent. Downside was lots of probable places to leak/seep oil in-between each section and I would imagine cost of production. The later design was one large gear pump section (with a flow divider) and the smaller Traction Booster pump section. These worked well but usually required a little more throttle to get the hitch or remotes to lift a load from idle. Notice both pumps always kept the Traction Booster idependent so nothing else affected it's output. The original triple pump design also (in my opinion) was to try and combat the John Deere 4010 closed center hydraulic system design propaganda that had been going on since 1961.

Posted By: MACK
Date Posted: 20 Dec 2011 at 6:33am

Early pump had a manifold bolted to back with flowdivider and PS relief valve in it. The later had the PS relief valve and flowdivider made in it.

As far as to which is best, which ever is on your tractor is the one you about have to use. Could use later on older tractor but would take some pluming and different mounting housing on front of pump. MACK

Posted By: Joe(TX)
Date Posted: 20 Dec 2011 at 7:20am

The early pump did not have a flow divider. It was a 3 section pump like Dr Allis stated. The flow divider on the later is on the back of the pump along with the ps releif.

The biggest problem with the later pump is the flow divider not working.

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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A

Posted By: stray
Date Posted: 20 Dec 2011 at 5:44pm

Does anyone know when the later pump started being used?

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1969 190XT series 3

Posted By: DrAllis
Date Posted: 20 Dec 2011 at 7:23pm

Very late series 3 190XT's....it was at a certain s/n....you'll know it when you see it because it's the same as a 200.

Posted By: mark vaughn
Date Posted: 20 Dec 2011 at 11:34pm

Thank you for your responces and answers to my question . You all have been a great help help with your answers and i learned a lot. thank yall very much and have a MERRY CHRISTMAS EVERYONE.