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Dec 03, 2007 9:47 am
Dec 03, 2007 9:47 am
Subject: Jackall system
For those interested in the Jackall system of the V12 (and I think some other models), I have repaired the system in my car. Probably they had not been used for decades and most of them were completely seized up.
For those interested in repair details, please let me know, then I try to go in a more detailed description. I also have a photocopy of several pages explaining the repair (I received it after I had done half the job) "The D.W.S Permanent Jacking System"
In short: you have to remove them from the car (easy for the rear, tricky for the front on V12s). Then you have to open them to replace the rubber seals inside (received from Tim Jayne of Dennison Jayne, USA, Fax 001 610 436 9561, a complete set did cost 70USD in 2003). A lathe is very helpful in holding the cylinders and especially to pull the springs out when reassembling. You also need some small tools, I made them from aluminium (needs lathe too).
The internal seals are tricky to adjust, to much does not let them retract and to less lets the hydraulic oil trickle out later. Also the seal at the very top and bottom are important to avoid a mess of oil later under your car.
In short: it took me weeks to get it running, they are almost useless on modern roads with a tire change every decade but I found it a very nice feature to preserve
Peter
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For those interested in the Jackall system of the V12 (and I think some other models), I have repaired the system in my car. Probably they had not been used for decades and most of them were completely seized up.
For those interested in repair details, please let me know, then I try to go in a more detailed description. I also have a photocopy of several pages explaining the repair (I received it after I had done half the job) "The D.W.S Permanent Jacking System"
In short: you have to remove them from the car (easy for the rear, tricky for the front on V12s). Then you have to open them to replace the rubber seals inside (received from Tim Jayne of Dennison Jayne, USA, Fax 001 610 436 9561, a complete set did cost 70USD in 2003). A lathe is very helpful in holding the cylinders and especially to pull the springs out when reassembling. You also need some small tools, I made them from aluminium (needs lathe too).
The internal seals are tricky to adjust, to much does not let them retract and to less lets the hydraulic oil trickle out later. Also the seal at the very top and bottom are important to avoid a mess of oil later under your car.
In short: it took me weeks to get it running, they are almost useless on modern roads with a tire change every decade but I found it a very nice feature to preserve
Peter
Attachments: