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Old 06-29-2009, 07:53 PM   #1
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Fluid for HWH Jacks

Can I use Coastal or NAPA brand jack fluid for my Damon's HWH jacks?
The Coastal brand describes itself as AW-32. I'm not familiar with oil specs for hydraulic systems.

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Old 06-29-2009, 08:45 PM   #2
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Do you have an owner manual for the jacks? The type of fluid used should be specified there.

I found some HWH manuals online (Series 305 & 210 jacks) and both called for Dexron ATF as a substitute for HWH own brand of fluid. That's different than AW32 hydraulic fluid.


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Old 06-30-2009, 06:22 AM   #3
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Not sure where you are located, but Camping World (and I'm sure other camping supply stores) carry HWH fluid.
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Old 06-30-2009, 09:41 AM   #4
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My Damon Ultrasport 210 joystick HWH levelers specifies Dexron fluid and specifically says that hydraulic jack fluid or brake fluid can harm the seals.
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Old 07-01-2009, 08:04 AM   #5
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Hydraulic jack fluid is NOT compatible with the seals in HWH jacks. DO NOT USE IT!!!

As has been mentioned, use HWH hydraulic oil available at CW or other RV supply store, or use Dexron transmission fluid.

HWH is very helpful. Contact them by phone or email (see their web site) if you have further questions.
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Old 07-01-2009, 11:08 PM   #6
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Do NOT use hydrallic fluid or jack fluid. These will ruin the seals in the cylinders and pump and cleaning the system after it has been contaminated will be very expensive.

Check your manual or call HWH. It should say use either the HWH fluid or Dextron-3. Check the color of what is in yours and I would suggest use the same. The HWH fluid is very light in color, maybe a slight yellowish color. Dextron-3 is red in color. Mine has Dextron-3.

Also, don't over fill the tank. The tank will be at the full mark only when the slides are retracted (stowed) and the jacks are stowed. With slides out (extended) and jacks extended the tank will be almost empty.
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Old 07-02-2009, 04:07 PM   #7
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My HWH fluid container has a label that states Dextron III auto trans fluid is required.
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Old 07-02-2009, 10:13 PM   #8
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I had questions in this regard, and called the jack people. When I gave him the model #, he said to buy the cheapest hydraulic fluid available - the store brand would be just fine. I sugest you talk to the mfr before doing any damage. You might luck out like I did.

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