The unit will not operate in high speed setting.
Serial number? edit: serial number is important for a few reasons. There have been a few changes over the years. slip-rings, 2-speed valve location, operating system, anti-stall circuits, etc. A few things to consider in the meantime: Terminal 29 in the lower control box is powered from the upper controls on its way to the 2-speed valve. Be sure there is power at terminal 29 when the High Drive switch is activated. Also, engine RPM is monitored by the HorsePower Limiter Board (pre 4001 serial #) and the ALC500 microcontroller board (after 4001 serial #). If the RPM is not in the range of ~2000-2500 RPM, there probably will not be a high drive. We can pinpoint the diagnostic procedure easier and less time-consuming once we have the serial number.
Serial # Serial Number is 911.
Found a loose connection. Thanks
Good to see you got it going! for the benefit of others, where was the loose connection?
It was a wire on the switch on the platform. The original ring terminal had been replaced with a spade terminal and it slipped off the screw on the switch. (The lift was not here and I did not see it myself, I would like to think I would have found that as that is the first thing I would have checked.)
I was wrong the unit is acting up again. It does have power at terminal 29, but meter show 250 Volts. Any Ideas? It does not work right a low speed either. When drive is engaged, the unit starts at normal speed but immediately slow to a crawl.
250mv maybe? lets start from the top. in the upper control box, mounted to the rear side of the box is the drive Anti-Stall Board (Horsepower Limiter Board). With machine in the stowed position: 1) Place voltmeter leads to terminal 1 (positive) and terminal 2 (negative) of the Anti-Stall Board. With engine running and foot pedal pressed there should be no less than 12.0 volts DC on the voltmeter. Do not use another ground point for the voltmeter, be sure to have the nevative voltmeter lead on the number 2 terminal. 2) If step 1 is 12 or more volts, while leaving the voltmeter connected as in step 1, stroke the drive joystick fully forward or reverse and note the voltage. There should be no significant voltage drop. If there is, we will have to trace back the terminal 1 circuit to the source of the voltage drop. 3) If step 2 has no significant voltage drop, move the voltmeter positive lead to terminal 10 of the Anti-Stall Board. Leave the voltmeter negative lead on terminal 2. With engine running, foot pedal pressed and the drive joystick stroked all the way forward or reverse, there should be no less than 9.0 volts DC. If no voltage is present, then the card took a dump. If there is voltage present but is lower than 9 volts, it may need adjusting. Verify there is no ground present on terminal 6 of the Anti-Stall Board. If a ground is present, the card is in the Elevated Drive Speed Reduction Mode. If there is a ground at terminal 6, the voltage at terminal 10 should be about 2.8 volts when the drive joystick is fully stroked/engine running/foot pedal pressed. A ground present at terminal 6 while in the stowed position signifies there is a limit switch issue.
We checked the voltage between 1 & 2. It is 12.4 Volts with the pedal pushed. When we moved the handle to drive on low speed the voltage dropped to 11.4 and on high speed it dropped to 10.2. Do you know if there is a better place to get wiring schematics that gogenielift.com?
It would be nice to have the important reading from terminal 10 with joystick stroked as outlined in my previous post. What schematics are you lacking?
My brother checked this over the weekend Termial 10 Low speed 1.59 V Forward 1.6 V Reverse High Speed 1.5 V Forward 1.5 V Reverse
Terminal 6 of the Anti-Stall Board will have a ground on it when the machine is in the not-stowed position. If the Primary Boom is extended or elevated or if the Secondary Boom is elevated, there should be a ground on terminal 6. When the Booms are stowed, the ground should leave terminal 6. This is accomplished by the limit switches on the booms. The voltages you gave for terminal 10 in your post would suggest the ground is still at terminal 6. This would suggest the booms are not fully stowed, limit switch(s) are not functioning properly or the Anti-Stall Board has given up the ghost. TEMPORARILY remove the wire from terminal 6 and take the readings at terminal 10 again. If the voltages are higher we will need to inspect the limit switchs and their circuits. DO NOT OPERATE THE MACHINE WITH THIS WIRE REMOVED . It is the wire that puts the machine in slow drive speed when elevated. The machine WILL tip over if driven in high drive speed while elevated .
Removing the wire from terminal 6 makes the unit work normally. The wire is grounded with the unit stowed. I suppose it is a faulty switch or a damaged wire.
I had a death in the family. When I finally returned to this and worked on it myself, I found bare wires in the wiring harness an the hinge of the primary boom. I replace those wires and the unit worked fine. I want to thank VoodooMojo for all the information, and I am sorry this is so long in coming.
Good Day! this is a old post, however Im having issues with this exact problem. Genie s60 2000yr. removing 6, it still doesn't show more than 1 v on term 10. any ideas?