Terex RT500-1 User Manual

Swing Circuit
CONDITION CAUSE REMEDY
SWING COMPLETELY
INOPERATIVE
Mechanical swing lock
applied, if equipped
Disengage the swing lock
Swing brake applied Disengage the swing brake
Spring brake stuck in applied
position
Disassemble swing brake
and free-up unit
Swing valve main relief valve
stuck in open position
See section on “Relief
Valves”.
Swing motor leaks
excessively internally
See section of “Fluid Motor”.
Mechanical fault in swing
reducer gear box or swing
bearing
Repair swing reducer or
replace swing bearing
Hose plugged or liner
collapsed
Replace hose.
Rotary manifold leaking
internally
Reseal rotary manifold
Swing pump faulty See section on “Pumps”.
SWING MOTION SLUGGISH Main relief valve stuck in
open position
Replace
Faulty swing pump Repair or replace swing pump
Swing motor leaks
excessively, internally
Replace or reseal motor
Excessive leakage around
swing control valve spool
Replace or replace control
valve
SWING MOTION ERRATIC Brake not releasing
completely
Check operation of swing
brake and/or swing lock
Low hydraulic oil level Add oil as required
Swing bearing not lubricated
properly
Lubricate swing bearing
Main relief malfunctioning See section on “Relief
Valves”.
RT500
Troubleshooting
216 REVISED:

Terex RT500-1 Specifications

General

Brand	Terex
Model	RT500-1
Category	Construction Equipment
Language	English