Aluminum Structural Framing
Automation & Control Products
Electrical Components
Hose & Connectors
Hydraulic Components
Liquid & Gas Pressure Products
Lubrication
Machine Safety Products
Pneumatic Components
Process Control & Components
Winches & Gear Drives
   

Condition: Faulty Operation

No Movement

Cause Solution
No Flow or Pressure Refer to INCORRECT FLOW CHART
Limit or sequence device (mechnical, electrical or hydraulic) inoperative or misadjusted Overhaul or repair.
Mechanical bind Locate bind and repair.
No command signal to servo amplifier Repair command console or interconnecting wires
Inoperative or misadjusted servo amplifier Adjust, repair or replace.
Inoperative servo valve Adjust, repair or replace.
Worn or damaged cylinder motor Overhaul or repair.

Slow Movement

Cause Solution
Low flow Refer to INCORRECT FLOW CHART
Fluid viscosity too high Fluid may be too cold or should be changed to clean fluid of correct viscosity
Insufficient control pressure for valves Refer to INCORRECT PRESSURE CHART
No lubrication of machine ways or linkage Lubricate
Misadjusted or Malfuctioning amplifier Adjust, repair or replace.
Sticking servo valve Adjust, repair or replace.
Worn or damaged cylinder motor Overhaul or repair.

Erratic Movement

Cause Solution
Erratic pressure Refer to INCORRECT PRESSURE CHART
Air in fluid Refer to EXCESSIVE NOISE CHART
No lubrication of machine ways or linkage Refer to INCORRECT PRESSURE CHART
Erratic command signal Repair command console or interconnecting wires
Misadjusted or Malfuctioning amplifier Adjust, repair or replace.
Malfunctioning feedback tranducer Overhaul or repair.
Sticking servo valve Clean and adjust or replace; check condition of system fluid and filters
Worn or damaged cylinder or motor Overhaul or repair.

Excessive Speed or Movement

Cause Solution
Excessive Flow Refer to INCORRECT FLOW CHART
Feedback transducer malfunctioning Overhaul or repair.
Misadjusted or malfunctioning servo amplifier Adjust, repair or replace.
Over-riding work load Adjust,repair or replace counterbalance valve