Yesterday, 10:48 AM
Richard and Jack,
Thank you for your help with this issue. Let me begin with your comments in italics:
The HWH hydraulics are a bit unusual, since on the extend function BOTH the extend and retract solenoids are open.
This news to me. It would seem that only one solenoid is to be open at one time depending on the direction of travel for the slide. Am I correct to assume the solenoids are all the same in their ability to allow pressure from the manifold to the piston. Is there a possible flow adjustment necessary through the solenoid (having greater flow-through by adjusting the needle valve) for this pressure differential to happen?
unusual check valve in the live end of the cylinder
You say this affects the EXTEND portion of the control. I have no problem with the slide extending. I believe this check valve is functional (unless it is somehow jammed open and will not close for the RETRACT command).
the extend and retract solenoids could be reversed
I will try to reverse the connectors to see if this may be the issue
...does the pump "grunt" when you push the retract button like it is applying pressure?
YES. The pump is fully operational when I press the switch. When I activate the RETRACT solenoid manually from the bay through the external 12V source (jump battery with a custom-made connector attached), immediately the slide begins to retract about 4-5 inches just from the residual pressure in the manifold without pump activation. When I engage the pump through the pump solenoid, I can get it to RETRACT the rest of the way.
...on the floor not coming up, are the lock pins engaged or disengaged?
For the rear slide, the lock pins do not engage when the floor comes up. It would seem the lock pins should not engage until the floor is up. I know the sensors are good, but the locks do not engage. Don't know why...
On this coach, the lock pins are engaged by means of proximity sensors. When the sensors are triggered, the lock pins should engage. The front slide did experience the top lock pins creating new ventilation for the slide (It has been repaired already), due to my error of connecting the rear slide sensors to the front slide controls.
Additionally, the floor up controls are activated by means of proximity sensors. This has been verified by Newell and me in ceiling of the bay. When the slide was completely out, I activated the floor-up sensor circuit by jump wire, and manually opened the floor-up solenoid in the bay. The the floor still did not come up.
I sent Jack a logic flow of what happens in the sequence. That logic flow may help you.
Slide out operation:
There are two normally open (NO) limit switches under the slide portion of the floor. One engages the start of floor operation, the other engages the stop of floor operation. It may be the one to engage the stop floor up sequence is either stuck in the closed position or chewed through and short circuited. Accessing this switch requires complete removal of everything on the slide... OH boy! Just what I did not want to do!
I now have my work cut out for me in working through these possible solutions. By the way, if you are the least bit religious, pray that I do not use my non-church words as I try these solutions.
Thank you for your help.
Keith
Thank you for your help with this issue. Let me begin with your comments in italics:
The HWH hydraulics are a bit unusual, since on the extend function BOTH the extend and retract solenoids are open.
This news to me. It would seem that only one solenoid is to be open at one time depending on the direction of travel for the slide. Am I correct to assume the solenoids are all the same in their ability to allow pressure from the manifold to the piston. Is there a possible flow adjustment necessary through the solenoid (having greater flow-through by adjusting the needle valve) for this pressure differential to happen?
unusual check valve in the live end of the cylinder
You say this affects the EXTEND portion of the control. I have no problem with the slide extending. I believe this check valve is functional (unless it is somehow jammed open and will not close for the RETRACT command).
the extend and retract solenoids could be reversed
I will try to reverse the connectors to see if this may be the issue
...does the pump "grunt" when you push the retract button like it is applying pressure?
YES. The pump is fully operational when I press the switch. When I activate the RETRACT solenoid manually from the bay through the external 12V source (jump battery with a custom-made connector attached), immediately the slide begins to retract about 4-5 inches just from the residual pressure in the manifold without pump activation. When I engage the pump through the pump solenoid, I can get it to RETRACT the rest of the way.
...on the floor not coming up, are the lock pins engaged or disengaged?
For the rear slide, the lock pins do not engage when the floor comes up. It would seem the lock pins should not engage until the floor is up. I know the sensors are good, but the locks do not engage. Don't know why...
On this coach, the lock pins are engaged by means of proximity sensors. When the sensors are triggered, the lock pins should engage. The front slide did experience the top lock pins creating new ventilation for the slide (It has been repaired already), due to my error of connecting the rear slide sensors to the front slide controls.
Additionally, the floor up controls are activated by means of proximity sensors. This has been verified by Newell and me in ceiling of the bay. When the slide was completely out, I activated the floor-up sensor circuit by jump wire, and manually opened the floor-up solenoid in the bay. The the floor still did not come up.
I sent Jack a logic flow of what happens in the sequence. That logic flow may help you.
Slide out operation:
- Key on.
- 30ish second delay to pull slide seal flat
- lock pins retract... lock pin retracted signal to brain
- both extend and retract solenoids open
- room moves outward until limit switch in center of basement floor makes telling brain to close solenoids
- pin down solenoid activates, pins go down, pin down signal sent to brain
- floor solenoid up is activated
- floor up switch is made
- Floor solenoid deactivates
There are two normally open (NO) limit switches under the slide portion of the floor. One engages the start of floor operation, the other engages the stop of floor operation. It may be the one to engage the stop floor up sequence is either stuck in the closed position or chewed through and short circuited. Accessing this switch requires complete removal of everything on the slide... OH boy! Just what I did not want to do!
I now have my work cut out for me in working through these possible solutions. By the way, if you are the least bit religious, pray that I do not use my non-church words as I try these solutions.
Thank you for your help.
Keith