I used a Mico brand line lock on my first 40 for several years and never had a problem with it. It was the manual lever style, not the newer electric switch ones. It looks just like the one below, except it doesnt have the square box and wires on the back.
Its basically a valve that "locks" the brake fluid pressure to hold your brakes.
Apply pressure to your brakes, hit the lever or switch and it holds that pressure till you move the lever or switch to release pressure.
If your factory e-brake works in your wagon, I wouldnt bother with a line lock.
you said 62 so I figured it was a wagon....not a 62fj/bj/kj/dj/lj/pj/ppj/or bbqj
I'm running Biondo electric line locks I purchased from Summit Racing. These are rated to 3000 PSI, and are designed for race cars. I have one on each axle, and they are independently activated. Definitely not for overnight parking on a hill, by can't be beat for shorter periods of time.
If I were to use just one, I'd put it on the rear axle, like a parking brake. However, if your mechanical parking brake works well, then put the line lock on the front. Installation is very easy. I just installed each one near the axle, about a foot from where the brake line splits to each wheel. Run a ground wire to the frame, and amother wire to an energized toggle switch in the dash. A two banana job.
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