| Author | Message | ||
| Ted Gilbert (Ted01)
Registered Member Username: Ted01 Post Number: 11 Registered: 12-2007 Posted From: 71.60.34.88 Rating: N/A |
Has anyone had experience with setting up an electric over hydraulic twin cylinder slideout mechanism? Csan't seem to get it right. any help appreciated. | ||
| Ray Drummond (Ray_d)
Registered Member Username: Ray_d Post Number: 56 Registered: 4-2006 Posted From: 69.105.84.94  Rating: N/A |
Yep, I have some experience in this, what are you having problems with? | ||
| Ted Gilbert (Ted01)
Registered Member Username: Ted01 Post Number: 12 Registered: 12-2007 Posted From: 71.60.34.88 Rating: N/A |
can't get the darn thing to push out straight.understand the principle but,keeps changing got me stumped. | ||
| Ron Walker (Prevost82)
Registered Member Username: Prevost82 Post Number: 398 Registered: 11-2003 Posted From: 208.181.210.47  Rating: N/A |
Is there a flow divider (gear type would be best)between the pump and the cylinders? Without one the system will extend the cylinder of lest resistance. | ||
| Ray Drummond (Ray_d)
Registered Member Username: Ray_d Post Number: 57 Registered: 4-2006 Posted From: 69.105.84.94 Rating: N/A |
A flow divider is not accurate enough at the slow speed that you want in a slide out. You need a synchronizing cylinder hooked up in a regenerative circuit. HWH makes a good one, but you may have trouble buying from them. I found mine in the suplus store at Northwest RV. Google HWH, they are in Iowa and they have a lot of good information on these circuits. Here is a link http://www.hwhcorp.com/onlineschool.html Ray D (Message edited by Ray_D on September 03, 2009) | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1614 Registered: 10-2003 Posted From: 71.58.110.9  Rating: N/A |
Above ground electric-hydraulic car hoists have a cable attached between cylinders to keep them lifting even. Go check one out. | ||
| Ted Gilbert (Ted01)
Registered Member Username: Ted01 Post Number: 13 Registered: 12-2007 Posted From: 71.60.34.88 Rating: N/A |
How about we go back to were we started we bought the slide unit out of fifth wheel got lines and all, guy wouldn't part with pump (long story) ebay got same pump.ok so i have all the parts great!Line came off pump to back of front cylinder,then went from other end to back of rear cylinder with T in the middle of that line. The last line went from the front of the rear cylinder back to the pump. Pump has reversing celenoid that runs the pump forward and reverse, my problem is the proper way to adjust this beast. | ||
| clint hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 457 Registered: 1-2009 Posted From: 24.129.237.52  Rating: N/A |
??? so is this a new installation that has yet to work proper in the new installation??? <Have you got air in the system (foamy fluid), as gas is easily compressed, that would cause malfunction to a otherwise "perfected system", assuming it has been installed perfectly with no line mix-up or collapsed or "sucking air" leaks. >Did you use any new shaped fittings that would cause restriction or turbulence ( a tee, with one line strait through & one at a right angle used where a Y was previously used, or a new dis-similar fitting on one side that caused a restriction to flow volume/speed ? ...Details, Details , Details make for the best unseen diagnostic guessing & make the posting of much greater value to the archives, which is a major part of our communal efforts here, to keep on helping other buses live "onward & upward", is this not how we peace one & another off & encurage potential contributions to the resolve, by making it a informative read of transferable knowledge... | ||
| Ted Gilbert (Ted01)
Registered Member Username: Ted01 Post Number: 14 Registered: 12-2007 Posted From: 71.60.34.88 Rating: N/A |
Yes it is a new installation in the coach that I'm building, and it hasn't worked properly yet! T in middle line is straight through. I assumed it was used for some type of adjustment, don't know, that's the way it came out of the fifth wheel.doesn't seem to be foamy, but acts as though there might be air trapped somewhere. Backside moves faster than the front.I assume it's an air problem, but not sure how to bleed or adjust. | ||
| Don Evans (Doninwa)
Registered Member Username: Doninwa Post Number: 227 Registered: 1-2007 Posted From: 208.81.157.90  Rating: N/A |
The tee is maybe for bleeding the air out of the system or priming it. Since no oil can get from the pump to the top of the front ram or the bottom of the rear ram you have to fill that space with oil. Can you disconnect the rams and work them by hand with the lines in a container of oil to pump out the air and suck in only oil? If there is air trapped perhaps a capped nipple on the branch of the tee in a vertical position to trap air. Start with the nipple filled with oil and check and refill until no more air. Test with the rams disconnected if possible until you get them balanced to avoid tweaking the slide. Good luck Don 4107 PS Sometimes a funnel with a little tape around the outlet can be 'screwed' into a pipe fitting to fill it. (Message edited by Doninwa on September 04, 2009) | ||
| Ray Drummond (Ray_d)
Registered Member Username: Ray_d Post Number: 58 Registered: 4-2006 Posted From: 69.105.84.94 Rating: N/A |
It is not necessary to bleed the system by opening it up, when you move it in and out, the air gets trapped in the oil and gets out when the oil returns to the reservoir. The air is out when the oil is not foamy as it returns to the pump. I use HWH oil and do not know if all oils will do this. The procedure for getting air out, is in the HWH link, in my previous post. (Message edited by Ray_D on September 07, 2009) | ||
| Ray Drummond (Ray_d)
Registered Member Username: Ray_d Post Number: 62 Registered: 4-2006 Posted From: 69.105.84.94 Rating: N/A |
Ted, how is the slide going, have your solved your'e problems? Ray D |