AC 8010 Power Shift issue

No.  He better think really hard. I have never seen a collapsed filter. WHICH filter?? Changing hydraulic fluid (your words) has nothing to do with the TRANSMISSION. Transmission oil is on the long dipstick and takes 7+ gallons to refill after you clean the screen under the belly and change the vertical canister filter.  Hydraulic oil is the sight glasses and takes 17+ gallons after you change both belly filters and drain three drain plugs. Transmission filter is at the right rear corner of the tractor at belt buckle height. Hydraulic/differential filters (2) are under the belly that you lay on a creeper to change. This sounded like an electrical dashboard problem until the collapsed filter which still doesn't explain how the tractor moved at all if the pump is bad ?? He doesn't know..

He must have installed the filter wrong or the wrong filter and crushed it when using an impact on the draw bolt. I'm concerned about how much debris has moved from the collapsed filter into the Power Shift trans valve which may cause issues. The suction screen should be inspected and cleaned unless he did it when changing the trans oil. I still think it is an electrical panel issue.

Edited by DrAllis - 19 Mar 2025 at 5:54am

I've seen some wiring problems on those tractors behind the cookie sheet. I'm referring to the heat shield panel behind the engine, at the firewall. The main harness is easily seen once removed.

The shop foreman called today. They took the fuel tanks back off the tractor and after much research found that the inlet and outlet hoses to the pump were reversed. This is what was collapsing the filter. I’ve been running this tractor for three seasons and never had an issue until the light started coming on last fall. They did not catch this when they had it apart the first time. This time they also found a bad wire near the bell housing that was causing the light to come on. I suggested that maybe they switched the hoses when they were working on it last month but they said in order to right the situation they had to change out fittings to get the hoses back to the correct position. They want me to take partial responsibility and pay half the labor for the second trip to the shop. These people have been very good to work with over the years and I’m sure they run into many head scratchers working on these old tractors, but $12k later I’m wishing I would have just kept driving the tractor with the lights on and hoped for the best. Anyway, they assure me it’s a sound tractor and I am getting it back just in time to connect to the planter.

I bought the tractor on Bigiron 3 years ago. The tranny lights issue came up last fall. I took the tractor in for diagnosis and repair in January this year. They put in new senders for the lights and said idling the tractor for two hours resulted in conclusion that the lights were fixed. While in the shop I had them put new spindles and bushings in the front end, bearings in the front wheels, a new shroud on the radiator and change all fluids and filters. Then my story with the transmission begins. I told them to check out the tranny first so I wouldn’t be spending money on a dead horse, but they neglected to check the trans pressure while servicing so never noticed the swapped hoses. The transmission filter was collapsed when they serviced in January. My bill for everything was $10k. When the transmission pressure light came on driving it home, they decided to come to the field and check the pressure. They could not get a pressure reading at the filter and noted it was collapsed again so they loaded it up and went back to the shop, got back down to the pump and that’s when they noticed the hoses were switched. Someone apparently had the transmission worked on before I bought it. They’re now asking me to pay $2k of the bill for the second trip to the shop which is 50% of the total labor bill.

Would those reversed hoses cause the collapse? That’s what they think caused it. As far as they are concerned the mystery is solved.

YES !! the crossed hoses did indeed cause the filter to collapse.

I would expect it to work fine, but zero filtering of the tranny oil.

Butting in, to be clear, there is no inlet or outlet hose TO the pump , there are lines from the pump to the filter and to the shift cover. The pump draws fluid from the screen in the bottom housing into the gerorter pump and then sends it to the filter. From there it goes to the shift cover to power the clutches at 230PSI the remainder of the oil goes to the cooler and then back to the cover at 14-16 PSI and THAT is what triggers the lube pressure light below 1800 RPM  - if the lines were crossed , as Doc stated, it could have back flushed some of the trapped material into the shift cover.  All this to say this is a stretch to have crossed the lines unless the metal lines were replaced with rubber.  

People will surprise you.