The oil cylinder is working fine (especially the electric pump), but the cab is not moving.
Causes of failure and solutions:
The lift controller is not responding, and the electric pump does not work.
Causes of failure and solutions:
The relay of controller is making tick-tick sound, and the electric pump motor does not work.
Causes of failure and solutions:
After the cab is raised halfway, the electric pump stops working.
Causes of failure and solutions:
The electric pump control circuit is cut → Check whether the power of the whole vehicle is connected and whether the whole vehicle is in neutral gear, and check fuses.
The pump works, but cabin no longer lifting after lifting at halfway.
Causes of failure and solutions:
No enough oil in the oil tank → Lower the cab to the original position, and add oil. Please see image below.
The cab continuously slides down.
Causes of failure and solutions:
The inside of the hydraulic system is contaminated, causing the steel ball inside the hydraulic control valve does not seal the hole well → Clean the oil circuit route and add new oil.
The system works, but cabin lifts or falls more slowly than normal.
Causes of failure and solutions:
Cabin simply does not fall.
Causes of failure and solutions:
Parking at the position for too long, the cylinder limit pawl is locked /jammed → Move switch to “up” position, pump it up a little, then switch to the “down” position, and fall.
When the cab is falling, bubbles and oil overflow at air plug, and oil leakage at oil pump and oil sump, or even the oil sump bursts.
Causes of failure and solutions:
Too much oil → Check the image above for oil adding, and remove the extra oil.
“Leaking” oil in the oil tank air plug.
Causes of failure and solutions:
Normal Phenomenon → Automatic oil discharge phenomenon of air plug.
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