View Poll Results: Should the leveling jacks be down during winter storage?
Yes 14 24.14%
No 25 43.10%
Doesn't matter 15 25.86%
No opinion 4 6.90%
Voters: 58. You may not vote on this poll

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Old 05-14-2008, 08:47 AM   #29
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Thank you, very much for all the information. I will examine and provide feedback in a few days.
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Old 05-14-2008, 10:28 AM   #30
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HWH Schematics and Flow Diagrams
For the technically inclined and the curious this is a link to HWH and the hydraulic flow diagrams for various systems. Standard stuff really, but fascinating to those who work hydraulics. The sequenceing control of the kick down cylinder(not on all systems) operation before jack extension is interesting.Tried to find a cutaway or exploded veiw of jack online but its not there as they expect every one to just replace the ram instead of rebuild it I guess , and that really is the easiest fastest cheapest method. Will ask for them to email a cutaway if they have one.
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Old 05-15-2008, 08:10 AM   #31
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Diagram of a HWH lifting ram. Looks quite well built. Voted for storing out in poll.
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File Type: pdf ap15900.pdf (40.4 KB, 229 views)
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Old 05-16-2008, 05:53 PM   #32
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Following is a communication from HWH technical service.


Hi,You where kind enough to forward a print of a jack
> cylinder. I have some questions that I hope you will be kind enough to
> help with.The ram is hollow so the nipple on the end of the ram would
> drain the fluid if bolt or plug removed? Second with the cylinder
> retracted there would be minimal oil between the cylinder and the ram
> since there appears to be a seal/wiper at the top of the ram?

Date: Fri 05/16/08 12:26 PM No the nipple at the bottom of the ram is machined on and can not be removed. The only way to drain any oil out of the cylinder is to either remove the switch or the fitting on top of the jack and turn it upside down to drain. Yes you are correct there is minimal oil on the cylinder when the jack is retracted. Thank you Joe Portelli

----- Original Message ----- From: <ctdair@netscape.com> To: <sales@hwhcorp.com> Sent: Friday, May 16, 2008 10:21 AM Subject: Dealer Diagnose Problem

I will suggest again leaving extended to protect the interior of the cylinder by keeping
it filled with oil since we cant access it to protect other wise , and coat the exposed rod
or cover it to protect it since we have access to it when extended , if you coat it clean the
coating off before retracting.
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