Vanair Reliant RS45, Installation, Operation, Maintenance And Parts Manual

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RS45 HYDRAULIC-DRIVEN AIR COMPRESSOR
SECTION 6: TROUBLESHOOTING
090126-OP_r0 (JAN-2018) PAGE - 43
VANAIR MANUFACTURING, INC.
(844) VAN-SERV • www.vanair.com
HYDRAULIC DRIVE SYSTEM: FAULTY OPERATION (CONTINUED)
Hydraulic Flow Moves
Slowly (continued)
Viscosity of fluid too high Fluid may be too cold; allow system to
warm up.
Fluid may be fouled; change system fluid
to correct viscosity fluid.
Insufficient control pressure for
valve operation
Refer to information under INCORRECT
PRESSURE in this guide.
Machine integral components a/o
linkage not lubricated
Lubricate as needed.
Servo amplifier is out of adjustment
or malfunctioning
Adjust, repair or replace.
Servo valve sticks Adjust, repair or replace.
Cylinder or motor is worn or
damaged
Overhaul or replace cylinder or motor.
Hydraulic Flow Moves
Erratically
Pressure is erratic Refer to information under INCORRECT
PRESSURE in this guide.
Air is present in fluid Refer to information under EXCESSIVE
NOISE in this guide.
Machine integral components a/o
linkage not lubricated
Lubricate as needed.
Command signal is erratic Repair command console or connection
wire(s).
Servo amplifier is out of adjustment
or malfunctioning
Adjust, repair or replace.
Feedback transducer
malfunctioning
Overhaul or replace feedback transducer.
Servo valve sticks Clean and adjust; replace if necessary.
Check system fluid and filters; replace if
necessary.
Cylinder or motor is worn or
damaged
Overhaul or replace cylinder or motor.
Hydraulic Flow Moves
Excessively
Flow is excessive Refer to information under INCORRECT
FLOW CONDITION in this guide.
Feedback transducer
malfunctioning
Overhaul or replace feedback transducer.
Continued on next page
6.3 TROUBLESHOOTING GUIDE - HYDRAULICS
MALFUNCTION/FAULT POSSIBLE CAUSE CORRECTIVE ACTION