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>two microswitches that control the shut off of air to the step - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: >two microswitches that control the shut off of air to the step (/showthread.php?tid=1992) |
>two microswitches that control the shut off of air to the step - Jon - 02-14-2006 17:18 Could someone explain to me in simple terms how do these micro switches work? Both of these switches when push in cut out the power to wherever? I think (I'm I write?) Now what I don't understand is when the steeps are in the out position and when I close the door the steeps just stay out. I changed out the push button switch on the door and I made sure the toggle switch that in that general area is in the up position and the light are on in the steep well and the fluorescent light above is on. But the steeps still stay in the open position. I really don't understand how these two micro switches work in conjunction with the action of the steeps being out? I can see how they would stop the travel of the steeps in the close position but not in the open. Is there away to test these two micro switches? I wish I had a blueprint of this circuit on the steeps as its like a rubik's cube to me. Well anyway I have by passed whatever is wrong and can operated the steps by using a short piece of electrical wire and touch each wire that goes into the solenoid operated air direction vlv. They work great then. Any help would be greatly appreciated. Jon Oh yes one more question and that is? Should the entrance light stay on when the door is open and turn oft when it closed? This also does not happen now and their in lays the problem I think. >two microswitches that control the shut off of air to the step - Jeff Miller - 02-15-2006 02:58 Without knowing what year/model you have, it's a bit unknown. Up until about '83 there was one microswitch. The step pulled in until the microswitch (N.C.) was hit, which interrupted the 12v to the step solenoid, the solenoid stopped supplying air to the retract side of the step cylinder, and the step stopped. If it leaked down, eventually the step would creep away from the microswitch and pull the step back in again, ... worked okay. In '83 the step system started changing. They added a second microswitch so that when the step was all of the way out, the second microswitch would interrupt the 12v to the step solenoid and the step would stop moving. This works well if all switches and linkages are working and adjusted properly. On these later steps the step mechanism had an over-center position where the rotation of the step mechanism would travel over-center and mechanically lock the step out so that it would stay there without residual air pressure. A later version (starting '84) has a second air cylinder which is Teed into the retract side of the primary air cylinder. This second air cylinder is essentially a spring-loaded lock-pin which is a secondary lock to hold the step in the extended position, many don't lock because the spring can't overcome the crud on the lock pin or it is bent, usually easily repairable, ... When the step starts to retract, the air goes to the retract side of the primary air cylinder and also to the lock-pin cylinder, retracts the lock-pin and then the step. There are a couple of different wiring diagrams / schematics also, depending on the year of your coach and whether it has been "upgraded" to the later method which many coaches have (via BB or dealers). Some years the step light comes on with either a switch, or if the step is in automatic mode it comes on with the door opening/step extending. Posting your year might help to determine which schematic ORIGINALLY applied to your unit, but honestly I've found few coaches through the mid-'80s that have the original wiring. - Jeff Miller in Holland, MI --- In WanderlodgeForum@yahoogroups.com, "Jon" > > Could someone explain to me in simple terms how do these micro > switches work? Both of these switches when push in cut out the power > to wherever? I think (I'm I write?) > > Now what I don't understand is when the steeps are in the out > position and when I close the door the steeps just stay out. I > changed out the push button switch on the door and I made sure the > toggle switch that in that general area is in the up position and the > light are on in the steep well and the fluorescent light above is on. > But the steeps still stay in the open position. > > I really don't understand how these two micro switches work in > conjunction with the action of the steeps being out? I can see how > they would stop the travel of the steeps in the close position but > not in the open. > > Is there away to test these two micro switches? I wish I had a > blueprint of this circuit on the steeps as its like a rubik's cube to > me. > > Well anyway I have by passed whatever is wrong and can operated the > steps by using a short piece of electrical wire and touch each wire > that goes into the solenoid operated air direction vlv. They work > great then. > > Any help would be greatly appreciated. Jon > > Oh yes one more question and that is? Should the entrance light stay > on when the door is open and turn oft when it closed? This also does > not happen now and their in lays the problem I think. > >two microswitches that control the shut off of air to the step - Jon - 02-15-2006 13:18 --- In WanderlodgeForum@yahoogroups.com, "Jeff Miller" wrote: > > Without knowing what year/model you have, it's a bit unknown. > > Up until about '83 there was one micro-switch. The step pulled in > until the micro-switch (N.C.) was hit, which interrupted the 12v to > the step solenoid, the solenoid stopped supplying air to the retract > side of the step cylinder, and the step stopped. If it leaked down, > eventually the step would creep away from the micro-switch and pull > the step back in again, ... worked okay. > > In '83 the step system started changing. They added a second > micro-switch so that when the step was all of the way out, the second > micro-switch would interrupt the 12v to the step solenoid and the step > would stop moving. This works well if all switches and linkages are > working and adjusted properly. On these later steps the step > mechanism had an over-center position where the rotation of the step > mechanism would travel over-center and mechanically lock the step out > so that it would stay there without residual air pressure. A later > version (starting '84) has a second air cylinder which is Teed into > the retract side of the primary air cylinder. This second air > cylinder is essentially a spring-loaded lock-pin which is a secondary > lock to hold the step in the extended position, many don't lock > because the spring can't overcome the crud on the lock pin or it is > bent, usually easily repairable, ... When the step starts to retract, > the air goes to the retract side of the primary air cylinder and also > to the lock-pin cylinder, retracts the lock-pin and then the step. > > There are a couple of different wiring diagrams / schematics also, > depending on the year of your coach and whether it has > been "upgraded" to the later method which many coaches have (via BB > or dealers). Some years the step light comes on with either a switch, > or if the step is in automatic mode it comes on with the door > opening/step extending. > > Posting your year might help to determine which schematic ORIGINALLY > applied to your unit, but honestly I've found few coaches through the > mid-'80s that have the original wiring. > > - Jeff Miller > in Holland, MI > > > --- In WanderlodgeForum@yahoogroups.com, "Jon" > > > > Could someone explain to me in simple terms how do these micro > > switches work? Both of these switches when push in cut out the > power > > to wherever? I think (I'm I write?) > > > > Now what I don't understand is when the steeps are in the out > > position and when I close the door the steeps just stay out. I > > changed out the push button switch on the door and I made sure the > > toggle switch that in that general area is in the up position and > the > > light are on in the steep well and the fluorescent light above is > on. > > But the steeps still stay in the open position. > > > > I really don't understand how these two micro switches work in > > conjunction with the action of the steeps being out? I can see how > > they would stop the travel of the steeps in the close position but > > not in the open. > > > > Is there away to test these two micro switches? I wish I had a > > blueprint of this circuit on the steeps as its like a rubik's cube > to > > me. > > > > Well anyway I have by passed whatever is wrong and can operated the > > steps by using a short piece of electrical wire and touch each wire > > that goes into the solenoid operated air direction vlv. They work > > great then. > > > > Any help would be greatly appreciated. Jon > > > > Oh yes one more question and that is? Should the entrance light > stay > > on when the door is open and turn oft when it closed? This also > does > > not happen now and their in lays the problem I think. > > > Well my old coach is a 1978 Wanderlodge and it does have to microswitches right next to each other. They are located on a bracket that sits under the coach. It does have thies two microswitches but non at the open position. It would be nice if there was a microswitch that opperated at the open position but there is non. I can only say this is when the a cyclinder reaches it travel distance it just stay open till the door is closed and the push button switch on the door frame is in the down position. When in this postion the steps should retrack to the stow position but right now nothing! That togel switch in the stairwell is so you can activate the steps or secure them in place by removing the power source. So leave it up to the rebel bird to have some kind of wird set up! But this all looks like factory installed. One of those micro switches does opperate the light under the steeps when there in the open position also. Jon Rebel Bird 1978 Wanderlodge Bremerton Wa or the light switch on the steep well is |