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River Fluid Power
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- Aug 18, 2022
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It is possible that the gear pump failed. You can check it with a flow meter that has a pressure gauge and needle valve.
I forgot to mention that the machine drives forward and reverse OK, no problem. Would that eliminate the gear pump failure hypothesis?
thanks
River Fluid Power
Well-known member
- Joined
- Aug 18, 2022
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- 107
Possibly. If you lose hydraulics suddenly, it is usually the gear pump or the main relief valve in the hydraulic control valve.
This happened to me recently with a 1998 NH LX565 I was lifting something VERY heavy and all of a sudden--- the boom dropped and I was unable to tilt. I disconnected my forks and backed away from the load and I got some sporadic movement. I noticed that my hydraulic oil level was low ---- so I added some oil to see if that would help. EVENTUALLY --- oil started to show up underneath the machine. I assumed that it might be the gear pump broke or something else which would require tilting the cab, etc. So I went to the dealer for repairs. The good news was that it was ONLY the HOSES which failed. They said that the debris/muck in the skid plate area over the years had weakened the hoses and my excessive LOAD was too much for the corroded hose ends. Basically --- 4 (LONG) hoses and a lot of labor ---- had me back working. I was quite relieved it was hoses and NOT something "BIGGER" !!!
Are all your lights on the BICS coming on? If not you may have a safety switch malfunction or bad BICS module. Assuming you have already checked fuses and relays.
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Is there any electrical used to energize the valveing for the lift etc. If not start simple. Oil levels, leaks, or any linkage that may control the valve banks I am not familar with this BICS stuff. However, if it is controled by any moduals of sorts maybe a fuse? What drives the pump is that working etc. You can do this first then Pray
