Shop Floor Talk

Shop Floor Talk (https://www.shopfloortalk.com/forums/index.php)
-   Mechanical & Electrical (https://www.shopfloortalk.com/forums/forumdisplay.php?f=36)
-   -   Personal lift (https://www.shopfloortalk.com/forums/showthread.php?t=50964)

Shade guy 06-15-2019 04:04 PM

Personal lift
 
I have 2 Bil jax 1572 personal lifts. Neither one will lift.
I bought these at a auction last year the are former home depot lifts that were used at the stores.
We stored them at a jobsite we were working at waiting for the owner of the jobsite to pour concrete.
He finally did and we could not get them to work. We loaded them up and now they are in my garage.
They did work last year although we had trouble with the level sensors because the level sensor mounting
plate were bent I presume when loading with a forklift. I have the level sensor off and have the leveled and its not lifting.
I have the manual and looking at the electrical diagram. There is no voltage going to the sensor. I have unhooked the foot switches that are normally open to rule out the possibility they were bad. Now I am stumped
The wheels go up as they should and I have bypassed the pump solenoid and applied 12 volts to the hydraulic valve and it will lift
Electrical diagrams are like Greek to me.
Has anyone ever worked on one of these? I know it has to be some kind of sensor but which one?

mccutter 06-15-2019 06:34 PM

Do you have an electrical diagram?

Scotts 06-15-2019 06:42 PM

Good pictures of the pages on electrical will help.

Scott


Sent from my iPhone using ShopFloorTalk mobile app

Shade guy 06-15-2019 07:30 PM

here is a pdf of the manual
https://usermanual.wiki/Bil-Jax/BilJ...856102080/view

Scotts 06-15-2019 08:46 PM

Need to understand how you have the foot switches disconnected. You are correct showing they are normally open. If you disconnected the wires to them you will not have continuity and get power to the level sensor, Hook them back up and set a weight on them while you troubleshoot.

You should have power at T15 when you have all estops pulled out so the machine will operate, T15 supplies power to the foot switches, when both of the foot switches are pressed you should have power to the red wire on the level sensor.

Also if you have the level sensor off the machine you will need to have the ground wire connected so the level sensor will complete the circuit to switch on the power. Once the level sensor is level you will have power at T17

If these sat out in the rain I would be looking at the estop buttons for corrosion, All the push buttons for corrosion. I also see some diodes on the drawing that may be on a circuit board, that don't like water. Also look for a blown fuse.

I am not familiar with your piece of equipment first hand. Just a few thoughts.

Scott

Matt Shade 06-15-2019 11:34 PM

My internet isn't letting me find pics of the machine in question, so maybe I'm off base here, but when I was still working for a GC as a superintendent we had some scissor lifts the company owned that were giving me a lot of trouble. I went through every component I could and checked for NO, NC, proper voltage etc. I finally gave up and called a service tech out.
He promptly unplugged the cord that goes from the control box, to the base, and showed me where it had pins missing. He said it was very common for them to break off or melt inside the plug. If you don't see them fall out when you unplug it you wouldn't even necessarily know they were gone. Maybe yours doesn't have a plug like that, but it was pretty universal on the lifts we were using and he said they go bad all the time.

Scotts 06-16-2019 09:46 AM

And another thing to go along with Matt's comments, If it has those spiral spring shaped cords those do wear out and you will need to open up each end and check for continuity.

Scott

Shade guy 06-16-2019 09:46 AM

Here is one on ebay

https://www.ebay.com/i/173563243254?chn=ps

I will check out the ground on the level sensor.
Thanks for taking the time to help me

Shade guy 06-22-2019 10:20 AM

QUOTE=Scotts;737447]Need to understand how you have the foot switches disconnected. You are correct showing they are normally open. If you disconnected the wires to them you will not have continuity and get power to the level sensor, Hook them back up and set a weight on them while you troubleshoot

Done



You should have power at T15 when you have all estops pulled out so the machine will operate, T15 supplies power to the foot switches, when both of the foot switches are pressed you should have power to the red wire on the level sensor.


no power at t-15




Also if you have the level sensor off the machine you will need to have the ground wire connected so the level sensor will complete the circuit to switch on the power. Once the level sensor is level you will have power at T17


The level sensor is grounded internally




If these sat out in the rain I would be looking at the estop buttons for corrosion, All the push buttons for corrosion. I also see some diodes on the drawing that may be on a circuit board, that don't like water. Also look for a blown fuse.


]estops are working no corrosion

]The diodes are in the control box wired directly to the terminals
no fuses other than the one on the charger which tested good
Scott[/QUOTE]

Shade guy 06-22-2019 10:21 AM

Quote:

Originally Posted by Scotts (Post 737469)
And another thing to go along with Matt's comments, If it has those spiral spring shaped cords those do wear out and you will need to open up each end and check for continuity.

Scott

Thanks checked all the wires and they were good


All times are GMT -5. The time now is 10:54 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.