Good Morning Forum Users,
First time poster here.
I have a 2012 Z45/25J electric Man lift a secondary boom lowering problem. First off let me indicate that all other functions and controls appear to working as advertised for the man lift except the secondary boom lowering. If the speed control is set to 5 or faster, there is no apparent problem, but it could just not be as noticeable due to the speed at which the secondary boom lowers. When set to 4 or below, lowering the secondary boom causes the boom to stutter, when in the basket it feels as if you are in a shaker machine of some time. The hydraulic rams on the secondary boom are about 30 inches; during testing, I notice this problem occurs with the ram extended about 15 inches. Any lower than that; you can lower the secondary boom without incident. If you go higher than that, the secondary boom begins to stutter during lowering. If you continue the downward travel while stuttering, the stuttering stops when there is about ¼ of the ram extended. During the lowering process if it starts to stutter and there is less than 15 inches of the ram extended, you can raise the boom a little and start lowering again without incident.
Although I did not think it was the problem, I swapped a couple function solenoid valves around to see if there was any change; there was not. Since every other function on the man lift works great, I do not believe it to be a hydraulic pressure issue. I am thinking something with one of the hydraulic rams? Any help or suggestions would be much appreciated.
Richard
First time poster here.
I have a 2012 Z45/25J electric Man lift a secondary boom lowering problem. First off let me indicate that all other functions and controls appear to working as advertised for the man lift except the secondary boom lowering. If the speed control is set to 5 or faster, there is no apparent problem, but it could just not be as noticeable due to the speed at which the secondary boom lowers. When set to 4 or below, lowering the secondary boom causes the boom to stutter, when in the basket it feels as if you are in a shaker machine of some time. The hydraulic rams on the secondary boom are about 30 inches; during testing, I notice this problem occurs with the ram extended about 15 inches. Any lower than that; you can lower the secondary boom without incident. If you go higher than that, the secondary boom begins to stutter during lowering. If you continue the downward travel while stuttering, the stuttering stops when there is about ¼ of the ram extended. During the lowering process if it starts to stutter and there is less than 15 inches of the ram extended, you can raise the boom a little and start lowering again without incident.
Although I did not think it was the problem, I swapped a couple function solenoid valves around to see if there was any change; there was not. Since every other function on the man lift works great, I do not believe it to be a hydraulic pressure issue. I am thinking something with one of the hydraulic rams? Any help or suggestions would be much appreciated.
Richard
Secondary boom stutter z45/25j manlift
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