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Old 10-28-2014, 03:51 PM   #1
Join Date: Aug 2014
Posts: 48
Understanding Hydraulics

Ok, I posted a couple of months ago questions regarding HWH systems both lift and slide on a 2002 Winnebago 30V. The levelers have started working well with repeated activations. They don't appear to have the same leakage issues of the slide hoses. HWH promised to call back but haven't as of yet. So I have been drawing diagrams and writing down hose assembly #'s to get an idea of what goes where. I have two solenoid valves and reservoirs. There is a front two piston slide and a single piston rear slide. There is also a synchronizing cylinder with four fittings. In front of and free hanging is a five port fitting with one larger line giving input. Imagine a cross with two horizontal bars. The other four ports are feeding off the fitting. Here's the deal, the four hose assemblies are comprised of only two different hoses. In other words, the same hose # and length comes to that fitting from both sides diagonally across from each other. They are 211 and 108 inches long respectively. Can someone explain what is going on?

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Old 10-28-2014, 04:48 PM   #2
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Winnebago Owners Club
Workhorse Chassis Owner
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Posts: 686

I suspect you do not have the owners manual for this system ? It has a very useful flow chart and explanation of your system, If you do not have it let me know and I will try and post some pictures from my manual.

2003 Winnebago WFG33V Adventurer - 8.1 Gas, Workhorse Chassis - Medium Titanium Metalic

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Old 10-28-2014, 05:35 PM   #3
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Yeah I do have the owners manual but it doesn't explain this free fitting. I've searched HWH as well. In fact I did talk to them today but the young lady couldn't explain it either. I was assured they could supply all the necesssary hose assemblies once I have them id'd. I went to a Parker retail shop and was not assured they would have all the different diameters needed. But in the mean time I am curious as to how all these hoses relate. Thanks for the offer.
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Old 11-04-2014, 10:19 PM   #4
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What is the model # of your HWH system?
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
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Old 11-06-2014, 05:45 PM   #5
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Well after using the schematic and writing down each assembly # I got a handle on how everything relates to each other. I called HWH and they have responded magnificently. I am on the way to correcting the leaking hoses. The technicalities of routing are a huge issue on this unit for the top and bottom rear cylinders. The Winnebago 430V layout is the prefect storm for the 4 hoses. The space of an eight inch square with about two inches depth has the Main wiring harness, fixed black pipe and gas oven lines, frame cross member and shock mount, another cross mount, upturn in frame, large body dampener, four 1/4 inch hydraulic hoses, two other harnesses, the four 1/8 inch hoses going to slide all crunched together with not one iota of wiggle room for anything. Behind all that is the access channel with two hard turns to negotiate. To get to the channel cover might require removing the rear wheels. Oh joy!
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