Thread: Zf 6hp mechatronic valve body seals?

Having just changed out the seals on the control valve assembly on my RRS ZF6hp26 I did remove the rear cross-member see pic (Disco may be different?)
The LR manual uses a special tool to extract the rubber valve sleeves 307-492(LRT-44-005) https://jlrequipment.service-solutio...px?SKU=307-492
Ive seen some videos of butchering the sealing surfaces with seal picks and circlip pliers
This is what I used as a knockoff of the special tool (see pic), and it works without damaging the surface
You can see the 4 valve seals that have been installed sitting slightly proud og the housing. The old ones were compressed flush

Originally Posted by Grappler

Having just changed out the seals on the control valve assembly on my RRS ZF6hp26 I did remove the rear cross-member see pic (Disco may be different?)
The LR manual uses a special tool to extract the rubber valve sleeves 307-492(LRT-44-005) https://jlrequipment.service-solutio...px?SKU=307-492
Ive seen some videos of butchering the sealing surfaces with seal picks and circlip pliers
This is what I used as a knockoff of the special tool (see pic), and it works without damaging the surface
You can see the 4 valve seals that have been installed sitting slightly proud og the housing. The old ones were compressed flush

Mine were flush as well, I used external circlip pliers up the aperture of the seals and the pulled straight out, no damage to sealing surfaces.

I very much like the bolt idea. It looks easier and safer than carving out with a long nose.

Is it very difficult to swap the valve body control module between two mechatronic units?

I dont know first hand , but i suspect each is coded to the mechatronic and transmission control module, much the same as the injectors are. You do have to be careful not to damage the mechatrinoc with static discharge and so on, i wore an earthing bracelet when i did mine. Even when handling the mechatronic aside from the valve body.

The reason I ask is I fitted a newer low km trans a few years ago, but had to use the old mechatronic. If I can swap my module onto the newer valve body it will save a valve kit.