Troubleshooting
Section 7 Page 9
MSD SABER SERIES SHEARS
INTERNAL ROTATION CONTROL SYSTEM TROUBLESHOOTING
GUIDE
if equipped, continued
SYMPTOM
PROBABLE CAUSE
REMEDY
2. Rotation very slow, continued
3. Rotation speed too fast
4. Rotation is erratic
f. Internal leakage of valve
g. Hydraulic motor is faulty
h. Supply fl ow too low
a. Operating fl ow too high
a. Directional valve spool
b. Faulty electrical signal at directional
valve or unloading valve
c. Flow control valve cartridge is faulty
d. Faulty crossover relief on motor
e. Faulty hydraulic motor
a. Directional valve spool is sticking
i. Remove unloading valve and relief valve
cartridges in control valve cartridges;
check for contamination or seal manifold
damage.
i. Rebuild or replace motor.
i. Check base machine’s hydraulic system.
i. Adjust fl ow control to decrease fl ow
from the accumulator.
i. Push in manual overrides alternately;
then if sticking, try operating valve.
i. Check electrical wiring, valve coil, elec-
trical ground.
i. Check for contamination or seal dam-
age.
i. Check shear manual
i. Check shear manual
i. Push in manual overrides alternately,
then try operating valve.