Logan 85-Ton Open Loop Power Swivel, Руководство пользователя

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Logan 85-Ton Open Loop Power Swivel
GENERAL
Loss of charge pressure — Charge pressure gauge registers zero. Gauge may be defective. Remove charge
pump in neutral. pump and inspect for broken parts.
Loss of charge pressure — Vacuum gauge reading is high Suction strainer may be clogged.
pump in neutral. (10" Hg or more). Replace filter.
Loss of charge pressure — Charge pressure is less than 60 psi when Pump or motor may be defective. Close
pump on stroke. power swivel is rotating at full rpm. the ball valve in the high pressure line.
Put pump stroke on stroke. If charge pres-
sure is normal, the motor is defective.
Replace valve and bearing plates.
If charge pressure is not normal, the pump
is defective. Replace valve and bearing
plates in the pump.
Hydraulic oil overheats Temperature gauge registers 190°F Hydraulic oil has been aerated (a milky ap-
or higher. pearance indicates presence of air in the oil).
Check suction connections on charge pump.
Check oil level in reservoir.
AIR CONTROL SYSTEM
Unable to control speed Power Swivel has low rpm Low air pressure.
Adjust air pressure to 100 psi.
Sticky air cylinder.
Clean and lubricate air cylinder on pump.
Defective air control valve.
Replace valve section of pump control.
Swivel rotates when control is Visual Air cylinder rod is out of adjustment.
in neutral position (air controls) Remove bolt and allow rod to center.
Adjust rod end to match.
ELECTRIC CONTROL SYSTEM
Loss of speed control Visual Defective rheostat. Voltage to control valve
should be zero to 9 volts DC. Replace con
trol valve if defective.
Dirty or defective control valve. Free the
sticky spool by rapidly moving the lever on
the valve back and forth.
Loose electrical connection at control valve
or pressure safety switch. Clean and tighten
connections.
Loss of direction control Visual Defective forward/reverse switch. If no volt-
age to pump control valve. Replace with new
switch.
Swivel rotates when control Visual Control valve on pump is not properly cen-
is in neutral position (electric controls) tered. Loosen lock nut on hex bolt located on
the front of the control. Turn bolt in one direc-
tion until the swivel turns. Turn the bolt in the
opposite direction, counting the turns until
the swivel turns in the opposite direction.
Turn the bolt to midpoint and fasten the lock
nut.
Displacement control adjustment is not
centered. Consult hydro-transmission
manual.
TROUbLEShOOTING
Logan 85-Ton Open Loop Power Swivel • 18