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I saw a great restored HJ with what the owner said was ABS equipped. On the rhs near the radiator was a booster with 2 hydraulic lines, a vacuum connection with a filtered fitting, and a wire connection. Colour of booster is gold and DELCO is stamped with another word under it. A warning about a strong spring inside is on it. I have a photo on the phone... is this an early ABS? I know that GM US had rear only ABS back in '71. The photo of the plate is blurred but the top line looks like QWT69X0
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Yes they had a rear anti-lock system for the brakes. The vacuum unit pushed the canister over further into the guard. |
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Yes, the Delco-Moraine anti-lock rear braking system was introduced as an option (only with L31/M41) in late HJ & was made standard for the HX Statesman Caprice from October 1976 onwards.
Introduction of 4 wheel disc brakes in HZ made them redundant.
The earliest ABS system to my knowledge was seen on the Jensen FF, an AWD version of the Interceptor in 1967.
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I have a set of worksheets for this setup.
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Thanks your replies. I for one and maybe others would like some more info just to expand knowledge. I can not find (on the net) anything of technical help just that GM had it as early as '71. And the aircraft industry seems to have pioneered ABS.
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Hello Nick.
Its a good subject. The Jensen FF that Terry mentioned above was the first volume production car to use ABS. It used the Dunlop Maxaret system that was developed by Dunlop for aircraft use in the early 1950s.
I've seen it in Pommy aircraft from this period and later, and the whole system is contained in the wheel brake hub. Very clever, and very compact.
The first version, and the version used on the FF, was a mechanical system with a flywheel/clutch/hydraulic pressure relief valve. The FF also had traction control of sorts and a viscous coupled AWD system. It was incredibly advanced (and expensive) for its day. There are several FFs in Australia.
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johnperth any chance you can share the worksheets for this setup with us? |
looking for an ex ambulance based on the hj/x/z 2 tonner see photo
and collector of all things ambulance police fire and the odd hq to wb parts |
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worksheets would be great as I have exhausted an internet search.
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away at the moment won't have access to my stuff for a while will try to dig them out. they are only a few roneoed pages. Edited by user Saturday, 18 April 2015 9:23:06 AM(UTC)
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The HJ Holden and Statesman manual M37545 has 24 pages of Delco Moraine information if you can track one down. I brought a HX Caprice for parts a while back that had one fitted. I thought is was a primitive trailer brake system until I bit a bit of homework.
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sorry guys took my holden stuff to a swap meet last week and sold most of my books these pages were amongst it so I no longer have them.
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