27
OPERATION MANUAL
6.6 TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSES
ACTION
Machine shudder on the down
stroke.
• Incorrect relief valve setting
•
Re-adjust relief valve
Adjust the relief valve by unlocking the
hexagon head grub screw on the side of
the body of the valve. Turn in a clock-
wise direction closing the valve while
cycling the machine.
Machine will not cut.
• Low system oil pressure
• Check the blades for exces-
sive clearance or damage to
the cutting edges
1. Check the system pressure.
(See page 4)
2. Check the oil level (See page 24).
3. Check the blade gap (See page 21).
4. Check the blade clearance
(See page26)
5. Reset or regrind the blades as
required
Machine will not stop in
the neutral position.
• Check limit switch /relay
• Check directional control
valve
• Replace if necessary.
• Remove valve, check and replace if
necessary
Clamping does not work
• No clamping pressure
1. Check the system pressure. (See page
4)
2. Check electrical circuit
Oil leaking from cylinder
• Gland seal is damaged
• Change seal
Oil leaking from fittings
• Fittings are loose
• Tighten fittings
Page 27
Instructions Manual for HG-4012 (S948)
12/02/2018
