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03-09-2024, 11:18 AM | #1 |
Senior Member
Join Date: Jul 2012
Location: Central Maine
Posts: 646
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40 wt synthetic hydraulic fluid
I need it for my Stipe shocks. This is what they use. I have tried many, many sources. Tell me where you have found it please. Thanks, Bill
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03-10-2024, 10:12 AM | #2 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,479
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Re: 40 wt synthetic hydraulic fluid
With modern fluid types it might be easier to find using international standards for viscosity. Try ISO 150 since it is approximately the same as SAE 40. Synthetics are more expensive than mineral based oils. Either should work OK.
Last edited by rotorwrench; 03-11-2024 at 11:27 AM. |
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03-11-2024, 04:47 AM | #3 |
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Join Date: May 2010
Location: on the Littlefield
Posts: 6,167
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Re: 40 wt synthetic hydraulic fluid
Tractor hydraulic oil, I have started using Kubota hydrostatic multi viscosity in my original shocks
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03-11-2024, 11:25 AM | #4 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,479
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Re: 40 wt synthetic hydraulic fluid
I've used several different commercial hydraulic fluids over the years and have noted that most of them are lower viscosity types. ISO 150 or SAE 40 is about the most viscous type available. This makes it more difficult to source since there is a lower call out for the type.
In aviation, MIL-H-5606 was and still is used for most all light weight aircraft and it is a mineral base that is red in color. The heavy aircraft went to Skydrol years ago since it is temperature stable and synthetic with fire resistance being a necessity. The stuff will strip paint though so leaks have to be repaired quickly. Commercial fluids generally are not going to be used in areas where flammability is a problem. Most are still mineral based. Tractors and heavy equipment use large quantities of the stuff so synthetics are generally much more of an expense than necessary for equipment that uses such large quantities. Synthetics are being used more and more but still not as common as mineral based fluids. |
03-11-2024, 11:49 AM | #5 | |
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Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,856
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Re: 40 wt synthetic hydraulic fluid
Quote:
https://www.amazon.com/Super-Lube-54...zcF9hdGY&psc=1 |
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03-11-2024, 12:51 PM | #6 |
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Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,856
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Re: 40 wt synthetic hydraulic fluid
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