SWING SYSTEM
SUB-SECTION 6A
TABLE 6A-1 (CONTINUED)
PROBABLE CAUSE
REMEDY
TROUBLE
A.
Faulty swing pump.
A.
Repair or replace swing pump.
2. Swing motion sluggish.
B.
Swing motor leaks excessively
B.
Replace or re-seal the motor.
internally.
C.
Main relief valve stuck in open
C.
Remove & clean main relief valve.
position.
D.
Excessive leakage around control
D.
Replace complete control valve.
valve spool.
A.
Low hydraulic oil level.
A.
Add oil as required.
3. Swing motion erratic.
B.
Brake not releasing completely.
B.
Check operation of swing brake.
C.
Sewing ring not lubricated
C.
Lubricate slewing ring.
properly.
D.
Main relief malfunctioning.
D.
Check main relief valve.
6A-2
