WORKSHOP QUESTIONS
Ask the expert.
Why does a cylinder drift under load?
External leakage, piston seal leakage or load-holding valve / circuit connections may be involved.
Record when the symptom began, oil temperature and existing gauge readings. For the detailed sequence of checks:
Open Fault Hunter →Why does a new pump fail to build pressure?
Verify drive, rotation direction, suction conditions, unloading path and measurement location together.
Record when the symptom began, oil temperature and existing gauge readings. For the detailed sequence of checks:
Open Fault Hunter →Why does oil foam?
Air entrainment, low oil level and return/suction conditions are possible causes. Observation alone does not confirm the cause.
Record when the symptom began, oil temperature and existing gauge readings. For the detailed sequence of checks:
Open Fault Hunter →Why does a cylinder judder at startup?
Assess air, seal friction, mechanical alignment and load control together.
Record when the symptom began, oil temperature and existing gauge readings. For the detailed sequence of checks:
Open Fault Hunter →