Genie TMZ 34-19 Problems

John Kimura said:

Hi everyone,
I am the maintenance person for an church organization. We have received a equipment donation its a Genie2001 Genie TZ 34/19. I was told by the donor that he has had
intermittent problem with the lift such as noting works sometimes, and sometime it works. So after receiving this lift I tried to work it but cant get the outriggers to drop down, nothing happens.
Could someone give me pointers as to what to look for. Previous owner had informed me the battery's are 6 months old, all of the controls including the control box.
has been changed with new wiring and control box.

Click to expand...

Is the only problem you have is outriggers?

Carefully check all the limit switches on the booms. The outriggers will not deploy unless the machine is satisfied everything is in the “stowed” position. Also of course check the battery wiring and make sure everything is clean and tight.

Thank you for your reply. I have check all what you have stated, now I got all (4) outriggers to touch the ground but not lift the unit. My battery charge is at 80%,
is this causing the problem not enough power to do the lift?

When the outriggers touch the ground do you hear the motor and pump continue to run or do they stop?
If the pump continues to run then it’s likely a hydraulic issue. Not enough flow and pressure to lift the machine. Check the hydraulic fluid level. Probably a good idea to change the hydraulic filter if you don’t know the machine’s history. It’s a spin-on filter, easy to change.
If the pump stops when the outriggers touch the ground it’s probably an electrical issue. Most of these have auto leveling and the ground control box commands each outrigger to raise and level the machine. The auto leveling may be faulty or need calibration. In general, how does the wiring inside the ground control cover look? Any corrosion, evidence of prior wiring repairs?

Again really appreciate your response. Yes the pump still runs when the outrigger touches the ground, and agreeing with you, seems like the pump does have enough pressure to lift the machine.
I will do what you have suggested, check the hydraulic system and change the filter.
the entire control box and its wiring was replace so it looks like new.
Is there a way to by pass the auto lever just for testing?

Thanks again for your help
John

Depending on the model of your control system (there were three different versions) in addition to the auto level button there would be a separate push button for each outrigger so that you can operate each one independently. I’d have to look at the schematic but I think that gets you around the auto leveling function.
It would be helpful at this point to measure the system pressure when the pump is running. There’s no factory installed gauge, you’d have to adapt one. I think there are available ports on the pump to connect one. I have an idea but I don’t dare quote the pump pressure without first looking it up. Not sure if you are aware but you can download the service manual from Genie at no cost.

Yes the new controls have a auto function and individual function. The individual function only lets the outrigger touch the ground all (4)
when pressing the auto function it wont go up any more. Thanks for the advice will get a pressure gauges for the pump and will check the pressure.
Yes have downloaded the service and owner manual but didn't see a specific trouble repair for my problem.
Thank you very much will try all your suggestions, really appreciate your efforts.

John

Got the lift to operate found a defective limit switch on one of the outrigger. Encountered another problem which is the boom will drop down before lifting up.
Sound like I have air in the hydraulic system, is that a good conclusion. If so how do I blead the air out...

John

So do the outriggers lift and level the machine now?
Regarding bleeding, usually running the cylinders full stroke all the way in out several times will purge the air. There are bleeders on each cylinder but usually not needed. Each cylinder has a check valve for safety, when a cylinder is extended any amount it shouldn’t drift down on its own. Only when commanded down.

Yes the outrigger now works, it will touch the ground and lift the entire unit up, where the tire are about 6" above the ground.
Found a defective limit switch on one of the outrigger. By passed the limit switch so now the lift is working.
Thank you for the reply on bleeding the system. Yes we didn't have time to fully extend the unit, planning to run the machine tomorrow.
Thanks again for your advice, really appreciate your efforts.

Thank you for your advice on the repair of the lift. Yes we had run the lift through its full reach numerous time and
the drifting of the boom isn't happening, the system did bleed itself. Again thank you for your advices.

You’re very welcome. Glad you got it resolved and have a working machine now. Happy holidays!