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  1. Ricardo Catarino

    JLG 1250 AJP Drive Troubleshooting

    Updating for future troubleshooting. The problem was in the hydraulic swivel. Internal gaskets were blown causing two ports to leak between them. Pressure to steering comes from another pump and was leaking to the drive circuit. It was blown between ports 2 and 3 for diagram reference. Port...
  2. Ricardo Catarino

    Genie TZ34/20 Motor Controller

    Is it a Delta Q charger? If so, be sure it is a 24V one. The 48V ones look exactly the same, case and all. Fuse is to protect the controller but most times when it blows it's already too late, especially with that high Amp. Kinda like engine oil pressure sensors or temperature sensors. If lit...
  3. Ricardo Catarino

    Genie TZ34/20 Motor Controller

    Another good rule of thumb. Avoid using the machine while charging. It wears batteries quickly. Most equipments have an interlock while charging to avoid abuse, especially in rental companies. On good working batteries and charger, a fully charged machine, used on normal working conditions...
  4. Ricardo Catarino

    JLG 1250 AJP Drive Troubleshooting

    Did it before taking the pumps off to be checked by an hydraulic system expert house. Anyway, all 4 coils are disconnected right now and when breaks are released the left side immediately drives foward. Pumps are brand new. With coils connected, I did the drive and steer calibration and JLG...
  5. Ricardo Catarino

    Genie TZ34/20 Motor Controller

    Hi. It runs on 24V? If so, check batteries with a meter. Should be around 6,5 V each fully charged. Check density of electrolyte (green in each element on all 4 batteries). Check voltage when charger is plugged. Should rise to around 7. Charger must shutoff automatically when batteries charged...
  6. Ricardo Catarino

    JLG 1250 AJP Drive Troubleshooting

    Hi everyone. I'm currently working on a JLG 1250AJP that is giving me a huge headache. Numerous problems with boom control, CANBUS faults, Overload sensors and oil leaks that are all sorted out. But there's a drive problem that we haven't been able to solve yet. The machine uses a variable...
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