To be honest, I stole the idea from someone on the forum but then fitted it in my own way as I wasn't keen on the implementation on the forum. The handbrake is from http://www.hollinapplications.co.uk/ but the switch they give you is awful so I have bought a double pole aluminium switch from CBS to use with it instead. The key on the switch is it drives the actuator in both directions so it doesnt have an on/off (positive/negative) its more of handbrake on (positive) or handbrake off (positive) hence the need for a double pole switch.
A simple 15 x 15cm steel plate was drilled and bolted to chassis after shaping it to fit around the diff and then a hole was made to fit the actuator through. Angled steel was then used to connect the actuator to the plate utilising 8mm 8.8 bolts for the brackets with an 8mm 12.9 bolt for the back of the actuator. (12.9 is rated at 1200nm whereas 8.8 is 800). The actuator can be adjusted up to 800nm so the bolts chosen should be well within the operating range.
All steel used was 5mm thick for strength.
I had to thin the steel lever that AK give you to fit the actuator as it was too thick to fit into the gap in the actuator but other than that it is a simple setup because the actuator just pushes the handbrake lever instead of the cable pulling it.
A few minutes creating the test wiring and it all worked very well. I chose to extend the wiring from the actuator so it can be run through the tunnel to the dash which allows easy adjustment of the handbrake should it be needed at IVA.
The two wires are placed within 10mm loom conduit, routed through the handbrake cable hole that AK provides and held into place along the tunnel with 5mm x 20mm bolts into M5 rivnuts.
Hi Mark, have you got exact spec for Hiwin unit you used? Like the idea and in a great position with my build to do the same. Also, not that clued on wiring if you could advise. Thanks! Andy
ReplyDeleteHi Andy, What information do you need?
ReplyDeleteIts the only unit Hollins make if you are buying through them. If not it is an actuator that can drive in both directions, go up to 800nm (pre-set at 500nm). Wiring is straight forward as it comes with a control unit that you simply attach spade connectors to and a straight forward wiring diagram. If I recall 1 permanent battery positive, 1 earth, 1 switched ignition, 2 for the actuator (doesn't matter which way around these go) and 3 for the switch (because the switch is never in an off position, you need a double pole switch which essentially means on in on direction or on in the other).
Also, the only wires which need extending to the front are the two actuator wires which you can just crimp with an insulated joiner or solder together with some heat shrink tubes over it.
ReplyDeleteHello Mark,
ReplyDeleteI found your site off the Cobra Club website, and I am converting my 65 MGB to rear disc brakes, and I am interested in your electronic parking brake setup. I don't know if you are aware, but Photobucket has removed the pictures. I was wondering if you might be able to post the pics, or point me to where they may be. Thanks for any help you may be able to provide.
Ron