HandyRandy
Member
None of the platform controls work except for driving forward and back. I can start the engine. The horn works., that's it. All of the ground controls for the boom work.
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New Here/Jlg 40 HA problem
- Thread starter HandyRandy
- Start date
Rozay
Active Member
HandyRandy
Member
I have the manual, and have gone through the electrical schematics. I've got voltage everywhere I should, the breakers are good, the relays are good. I can drive forward and back, but can't steer right or left, from the platform controls. Everything works from the ground controls. Tilt light not on. I have the ford engine (gas/propane) Just spent all afternoon going over it again, still nothing.
willie59
Administrator
Is the platform controls standard controls (toggle switches) for boom lift and swing, or does it have proportional controls for boom lift and swing?
HandyRandy
Member
I have toggle switches
HandyRandy
Member
Every place the schematics show me I should have a ground, I have a ground.
willie59
Administrator
Have you verified that the toggle switches for boom functions is sending power to terminal #23 for the dump valve in the lower control box when you operate the switches?
HandyRandy
Member
That will be the first thing I do tomorrow. Thanks for your help. Happy St Patty's day.
willie59
Administrator
I don't think you have a ground problem at the platform because the proportional drive control works and it shares the same ground as the bang bang functions. What makes the bang bang functions different than the proportional drive control is the dump valve circuit that has to be powered up to work the bang bang functions both from the platform and the lower controls. Now, we know that circuit works from the ground controls because all functions work, but I suspect it's not being powered up when working the platform controls. When you operate any of the boom function toggles, platform or ground controls, it has to send power to terminal 86 of R13 bang band dump valve relay.
HandyRandy
Member
I get no voltage on terminal # 23 when I activate a toggle switch on the platform.
willie59
Administrator
Grab your diagram and go back to the platform. All the toggle switches for boom functions should have a Red/Org on one side of the double pole toggles. That Red/Org wire should connect to all the toggles and goes to terminal 23 on platform terminal strip. If you don't have power on 23 of the platform terminal switch when you step on the foot switch and activate a toggle, follow that Red/Org wire back and find out why.
HandyRandy
Member
Will do. Thanks.
willie59
Administrator
I know you stated earlier that you "had power in all the places that you should", but just to be sure, all the toggles at the platform get power on a yellow wire from terminal 36 and 38 when you press the footswitch, the yellow wire connects to the center terminals on the toggles. Make sure that yellow wire circuit is getting powered up or none of the toggle functions are going to work.
HandyRandy
Member
On my scematic I see red orange connecting to Basket Level, though to Rotate, Main Telescope, then Steer. I don't see another red orange leaving that. I do have power on 34,35, 36, 37, 38, and 39. I see a yellow wire coming from 36 to 3 on Tower Lift. I don't see another yellow leaving Tower Lift. Another yellow connects 3 on Main Lift to 3 on Swing, though Aux Power, through Steer, though Main Telescope, though Rotate, though Basket Level, though Pump Volume, to 3 on Drive, which gets power on 38. Is my schematic correct? Closing a switch transfers power from the yellow circuit to the red orange, right? I don't see a red orange on Main Lift, Tower Lift, or Drive.
HandyRandy
Member
When i say I don't see the wires, I mean on my schematic. I'll be back on the lift in the am.
willie59
Administrator
You're looking at a diagram for "Proportional Controls". Again I ask, is your machine proportional controls or standard controls? The difference, a proportional control machine will have PQ controllers for drive, main lift, swing, and tower lift, all other boom functions work via toggle switches. On a standard control machine only has a PQ controller for drive, all other boom functions work via toggle switches.
HandyRandy
Member
Sorry if I gave you the wrong information. I'm not familiar with the language. I do have toggle switches, but the drive is a a big joystick thing about 4 inches high that rocks forward and back for drive and reverse. I do have the schematics for standard or proportional.
willie59
Administrator
Ok, if you only have one PQ controller for drive (the big joystick thing) and all other boom functions work via toggle switches then you have a "standard control" machine. Refer to the diagram for platform with standard controls.
willie59
Administrator
The info I posted in post #14 applies to platform with standard controls.