Problems in powershurtle transmission and speedshift MF 5465

Ignacioap · Oct 22, 2018

Previous greetings

I have MF 5465 with problems in powershurtle transmission and speedshift, it does not march forward only backwards.
The forward and back solenoids have already been tested.

The truth is a never ending problem, reviewing in the service manuals and parts of the 5400 series 2005 - 2008, I found that there are machines of the same series with mechanical inverter.
Someone in the forum has seen or made such a conversion and does not depend on the hated solenoids.

I attached the link : MF 5435, 5445 mechanical reverse shuttle gearbox – Selector cover plate

thank you

TBN Support · Oct 23, 2018

:wave: Hi!

I'm going to move this thread over to our Massey Ferguson section.

lpdobbs · Jan 12, 2019

I have at 1995 MF 650 Industrial with the powershuttle and experienced a similar problem but in forward and reverse. I had power to the forward and reverse solenoids and could also hear them click when selecting forward and reverse. I ended up pulling the directional block selector valve which is the valve that is operated by the solenoids and also the spool valve which is what the block selector attaches to. It turned out that the piston inside the spool valve was showing some wear and possibly sticking. I was able to polish it up with some fine emery cloth and cleaned both bodies and replaced all of the o-rings. I reassembled everything and so far seems to be working fine.

Victorya · Feb 27, 2019

Hey lpdobbs, fun talking tractors with you at work today.

Victorya · Feb 27, 2019

This is the video lpdobbs shared with me today. Explaining Directional Valve Repair - Full Dismantle and Reassembly - YouTube
After I found this video, hope they help. Valve Solenoid Basics - YouTube
The second video shows how to operate the solenoids manually.
I have a Fermec 1999 640b (very similar to the MF650 mentioned above) and having a forward/reverse and power steering problem. First thing I am doing is cleaning or replacing all hydraulic filters, 3 total on these machines. As well as bypassing the hydraulic cooler to eliminate any flow restrictions causing the problem. Will replace all the hydraulic fluid with new fluid at the same time. If it doesn't work then the next trouble shooting steps would be for me to do pressure tests throughout the system and then flow tests. At this time I am waiting for good weather and a day off together. Will update asap.