SECTION 6: TROUBLESHOOTING
6 - 4 090189-OP_r0 (JUNE-2022)
VANAIR MANUFACTURING, INC.
(844) VAN-SERV • www.vanair.com
Cap•Start Hydraulic-Driven
12V/24V • Battery Starter • Charger
6.2 TROUBLESHOOTING GUIDE - HYDRAULICS
MALFUNCTION/FAULT POSSIBLE CAUSE CORRECTIVE ACTION
HYDRAULIC DRIVE SYSTEM: FAULTY OPERATION (CONTINUED)
Hydraulic Flow Is Present But
Motor Rotates Slowly
Relief valve is out of adjustment or
malfunctioning
Adjust, repair or replace.
Solenoid valve sticks Repair or replace.
Hydraulic Motor Moves
Erratically
Pressure is erratic Refer to information under INCORRECT PRESSURE in this
guide.
Air is present in fl uid Refer to information under EXCESSIVE NOISE in this guide.
Command signal is erratic Repair command console or connection wire(s).
Relief valve is out of adjustment or
malfunctioning
Adjust, repair or replace.
Solenoid valve sticks Clean and adjust; replace if necessary. Check system fl uid and
fi lters; replace if necessary.
Cylinder or motor is worn or damaged Overhaul or replace cylinder or motor.
Hydraulic Motor Rotates
Excessively
Flow is excessive Refer to information under INCORRECT FLOW CONDITION in
this guide.
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