question Zetor 7045 steering cylinder is leaking

[Dsalkowski]

Hi my steering cylinder is leaking pretty bad I haven’t taken apart yet but does anyone know if there’s a seal kit available or if the seals have to be matched up with what’s available
Thanks David

 

[Joachim]

Please make a photo from the cylindre - the I can take a look.

 

[Dsalkowski]

The cylinder is still on the tractor so the photos aren’t very good

 

[Joachim]

Please remove the dust boot at the location shown and slide it back to take a photo of what the cylinder looks like in that exact location.

There were various versions of the power steering cylinder.
If (if!!) yours is still original, it should be the "old" version; you will need the seal kit:
5511 3940 DS (around 15 €)
be aware, not the newer one 93-8302 for the Jihostroj steering cylindres.

But it's not just a hydraulic cylinder. The chrome-plated piston tube is hollow, and inside is an integrated control spool, which is controlled via a control tube from behind the cast part (spool housing).
You'll have to completely disassemble it and pay attention to a few things when reassembling (presets), and then fine-tune it on the tractor.
It will take (if you know what you're doing) about 2-3 hours, depending on how dirty it is and how much it resists disassembly.

A few photos of what to expect...





The small aluminum sealing ring (included in the sealing kit) is best removed with an 8mm drill bit. Twist the bit into the aluminum sealing ring by hand (!!!) and then pull it out with a firm tug. Do not drill it out with a power tool or hack at it with a sharp tool—you'll destroy the sealing surface!


There are three things to pay attention to when pre-adjusting during assembly:
- Preload the ball stud
- Adjust the slide tube (the thin inner tube) for no play
- Basic dimension after screwing on the chrome-plated piston tube

Fine adjustment on the tractor:
- Check all required dimensions: at the ball joint at the front of the power steering cylinder, at the control rod at the rear of the power steering cylinder, at the steering push rod, and of course, the tie rod
- Then, depending on where the steering cylinder operates independently, adjust it to the center position (it doesn't move independently) by turning the piston tube (slightly!!).

I have already resealed around 30 of these power steering cylinders for my customers. It's not difficult, but you have to keep a few things in mind.