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

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SECTION 6: TROUBLESHOOTING RELIANT RS45 AIR COMPRESSOR
PAGE - 42 090126-OP_r0 (JAN-2018)
VANAIR MANUFACTURING, INC.
(844) VAN-SERV • www.vanair.com
HYDRAULIC DRIVE SYSTEM: INCORRECT PRESSURE CONDITION (CONTINUED)
Pressure is low
(continued) Pump, motor or cylinder is
damaged or inoperable
Overhaul or replace as necessary.
Pressure is erratic Air is present in fluid Tighten leaking connections, fill reservoir
to proper level, and bleed air from
system.
Relief valve is worn or inoperable Rebuild or replace valve.
Fluid is contaminated Check system fluid and filters; replace if
necessary.
Accumulator is defective or has lost
charge
Overhaul or replace as necessary.
Pump, motor or cylinder is worn Overhaul or replace as necessary.
Pressure is excessive Pressure reducing, relief, or
unloading valve out of adjustment
Adjust; Rebuild or replace if necessary.
Yoke actuating device is
inoperative (variable displacement
pumps)
Overhaul or replace yoke actuating
device.
Pressure reducing, relief, or
unloading valve is worn or
damaged
Overhaul or replace as necessary.
HYDRAULIC DRIVE SYSTEM: FAULTY OPERATION
Hydraulic Flow Does Not
Move
No flow or pressure Refer to information under INCORRECT
FLOW CONDITION in this guide.
Limitation component is
(mechanical, electrical or hydraulic)
is inoperative or out of adjustment
Overhaul or replace.
Mechanically bound Locate the bind, and repair.
Command signal to servo amplifier
is absent
Repair command console or connection
wire(s).
Servo amplifier is inoperative or out
of adjustment
Adjust, repair or replace.
Servo valve is inoperative or out of
adjustment
Adjust, repair or replace.
Cylinder or motor is worn or
damaged
Overhaul or replace cylinder or motor.
Hydraulic Flow Moves
Slowly
Low system flow Refer to information under INCORRECT
FLOW CONDITION in this guide.
Continued on next page
6.3 TROUBLESHOOTING GUIDE - HYDRAULICS
MALFUNCTION/FAULT POSSIBLE CAUSE CORRECTIVE ACTION