190 xt surging/sliping
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=12875
Printed Date: 01 Feb 2025 at 12:37am
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Topic: 190 xt surging/sliping
Posted By: agazzi66
Subject: 190 xt surging/sliping
Date Posted: 24 May 2010 at 10:43am
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Hi I am having some sliping problems with my Allis, I pulled the tractor out of the barn for the first time since August of last year. I took it for a ride around the field to warm it up so I could change the oil and filters. When I was driving it in 3rd gear, it topped in its tracts, and then about 30 seconds went by and it took off again. It did this on several occasions. When I put it in 7/8 gear it did not want to move, but eventually did when I increased the throttle. Also when it was moving in 3rd gear, it didnt seem to be moving as fast as it did the last time I used it. If any one has expierinced this before, and has any info onthis problem, I would greatly appreciate it. I did check the hydraulic oil uder the floor board, and it at its correct level.
Thanks Adriano Stockbridge MI
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Replies:
Posted By: Skyhighballoon(MO)
Date Posted: 24 May 2010 at 10:45am
Check your suction line from the sump to the hydraulic pump for an leaks/cracks. If it's sucking air anywhere you could be intermittently losing prime at the pump. Mike
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1981 Gleaner F2 Corn Plus w 13' flex
1968 Gleaner EIII w 10' & 330
1969 180 gas
1965 D17 S-IV gas
1963 D17 S-III gas
1956 WD45 gas NF PS
1956 All-Crop 66 Big Bin
303 wire baler, 716H, 712H mowers
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Posted By: DougG
Date Posted: 24 May 2010 at 12:50pm
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Sounds like a Power Director issue , does the steering and 3 pt work ok? The POWERDIRECTOR clutches are held together by hyd. oil pressure , if that pressure isnt enough they slip, DONT LET IT SLIP LONG ; the clutch plates will break , warp , and then its rebuild time ; need to check ,like Skyhigh said ,the hyd. tube ,hoses, connections from the sump, theres a screen in the sump , may clean that ,change the hyd. filter, work the steering, 3 pt . ,with the tractor setting still ;PD in neutral ; make sure the likage coming from the PD lever is loose and moving without binding , a -fixit- manual will help you to check that the POWERDIRECTORS valve is letting the correct pressure of oil to the PD clutch ; HTH
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Posted By: Charlie (NC)
Date Posted: 24 May 2010 at 6:25pm
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Doug's right, I'd bet on it. Power Director is slipping or not fully engaging.
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Posted By: Dutchboy Johan
Date Posted: 25 May 2010 at 7:15am
Charlie: How can you figured out if the Power Director is fully engaging? By push the shifter in or low?
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---> Better by Design <---
Johan Straver, Almkerk/ Netherlands
Allis-Chalmers 190XT Ser.III #26829XTD
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Posted By: Charlie (NC)
Date Posted: 25 May 2010 at 8:20am
I'm afraid you'll have to reach out to others for that. My knowledge of the power director is in D series tractors only. I'm not sure how the 190xt is engaged. The D series tractors were mechanical, just throw the lever.
Inside the power director is fairly simple. It's just two wet clutches back to back with a lever assembly that pushes them forward or rearward, engaging one and disengaging the other. Most of the time one of two things keep them from working. Either some shims need to be moved around between the clutch packs or there is wear in the mechanism that engages/disengages the clutches. With the later tractors with more or less push button actuator controls on the PD the problem could also be in the "push button" mechanism.
I better stop because I've already gone off into areas where I'm repeating hearsay and not actual knowledge.
Hopefully someone else will pick up where I left off and correct my errors.
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Posted By: Amos
Date Posted: 25 May 2010 at 9:32pm
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The power director valve is plumbed downstream of the pto valve, unless you have a manual pto (in this case I am not sure of the plumbing routing as I have never worked on one of the manual pto tractors). There are two ports (1/8 pipe thread) on the power director valve. One is for testing high pressure and one for low. Run tractor at pto speed and check the pressure at each port with a gage. I think pressure should Be 190 psi, need to check the manual for sure though. Move the lever in and out of high/low a few times as you do it. My guess would be your linkage may have seized sitting for so long but you could have a problem in the valve to. I have fixed a 200 that ran with both clutches screwed and you don't want the parts repair bill for that. Best to fix them as soon as they start to slip.
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