06-05-2021, 07:24 PM | #1 |
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Houdaile oil
Hi guys I’m installing my 35 houdailes
I did a search but couldn’t find the answer, what grade hydraulic oil should be used? They were rebuilt by Apple hydraulics. Thanks Danny. |
06-05-2021, 07:43 PM | #2 |
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Re: Houdaile oil
I always thought 90w, probably not correct but I used modern 90-140 in mine but will caution one is leaking now, notrefurbished ‘46 shocks, after 10 years will research seal tolerances
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06-05-2021, 07:50 PM | #3 |
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Re: Houdaile oil
I’ve sent Apple an email too but being a weekend I don’t expect a response till next week. Apple machine the case to use a different seal to original, I guess I may have to wait for their response. Dan.
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06-05-2021, 08:26 PM | #4 |
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Re: Houdaile oil
Castor oil is what Henry used.
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06-05-2021, 09:45 PM | #5 |
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Re: Houdaile oil
I used hydraulic oil ISO 32 for years with good luck
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06-06-2021, 04:09 AM | #6 |
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Re: Houdaile oil
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I was told to use Hydraulic jack oil, which is what I have used in my 48; project. When I bench tested them, it gave me a pretty solid resistance ,so I am happy with this result. I think its about 10 w but I am often wrong, Dave |
06-06-2021, 09:49 AM | #7 |
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Re: Houdaile oil
Ford and Who-Die used 8 different formulas of fluid before settling an the final formula around 1938. Mineral oil, glycerin, and castor oil were all used with varying mixes with alcohol & glycerin and varying viscosities of the different fluid formulas. The final formula was mineral oil with an approximate viscosity equivalent to SAE 50 motor oil. With mineral oil, there was a recommendation to open the fluid needle more during cold weather operation for model A cars.
In the modern era, a person may have to experiment with different viscosities of hydraulic oil to get a formula that works for their climate application. Hydraulic oil has anti foaming additives that would make it the best consideration for this design of shock absorber. |
06-06-2021, 04:40 PM | #8 |
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Re: Houdaile oil
These were in my Dads garage, now in my shed, he used this in his bumper jack. I just noticed the Western Auto says not for houdaille shocks
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06-06-2021, 06:07 PM | #9 |
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Re: Houdaile oil
I was told 30 wt motorcycle fork oil by one of the rebuilders.
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06-08-2021, 07:02 AM | #10 |
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Re: Houdaile oil
Thanks all. I got a reply back from Apple hydraulics. They send them out with AW-100 hydraulic oil. So that’s what I’ll use Thanks Dan.
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06-08-2021, 10:59 AM | #11 |
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Re: Houdaile oil
ISO-100 is approximately SAE-30.
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