FAULT HUNTER / 04
Cylinder judders
LET US START WITH THE EXPERT
This motion has lost its rhythm. Let us distinguish air, friction and load-control problems.
Now continue with technical diagnosis using safe observations.Loading diagnostic path…
Other possible causes and technical explanations
Possible causes to examine for this symptom
These causes are preliminary assessments. The same symptom can have different causes in different circuits.
Examine air entrainment together with load control during downward movement.
How to check: Record movement direction, load conditions and foam at the tank indicator. A qualified technician should assess mechanical alignment separately from valve/pilot stability.
Possible solution: Eliminate confirmed air ingress. Bleed air only using the manufacturer's procedure. Alignment or load-control faults require appropriate installation or engineering corrections.
Open the related lesson →During downward movement, examine the counterbalance valve, pilot pressure and load-control stability.
How to check: Record movement direction, load conditions and foam at the tank indicator. A qualified technician should assess mechanical alignment separately from valve/pilot stability.
Possible solution: Eliminate confirmed air ingress. Bleed air only using the manufacturer's procedure. Alignment or load-control faults require appropriate installation or engineering corrections.
Open the related lesson →Visible foam means air entrainment and suction conditions should be checked first.
How to check: Record movement direction, load conditions and foam at the tank indicator. A qualified technician should assess mechanical alignment separately from valve/pilot stability.
Possible solution: Eliminate confirmed air ingress. Bleed air only using the manufacturer's procedure. Alignment or load-control faults require appropriate installation or engineering corrections.
Open the related lesson →Mechanical alignment, seal friction or fluctuating commands may be involved.
How to check: Record movement direction, load conditions and foam at the tank indicator. A qualified technician should assess mechanical alignment separately from valve/pilot stability.
Possible solution: Eliminate confirmed air ingress. Bleed air only using the manufacturer's procedure. Alignment or load-control faults require appropriate installation or engineering corrections.
Open the related lesson →