MALFUNCTIONS | 45
9 Malfunctions
Fault
Possible cause
Remedial measures
Device does not reach full performance Control buttons not fully depressed
Fully depress control buttons
Equipment delivers no power or
moves in the opposite direction to that
commanded
Pressure line (P) and return line
(T) were transposed when hoses or
couplings were replaced
Change round in accordance with the
repair instructions
Cutter cannot be coupled
Pressure build-up due to heating
(only SKS coupling)
Coupling halves are damaged or
heavily soiled
Drain a little oil out of the equipment
with the pressure relief plug, see
chapter 4.3 (only SKS coupling)
Oil escaping at the control handle (hole
between the hoses)
Return hose is not correctly coupled
(only SKS coupling)
Move power unit control lever to the
"0" position and couple correctly (only
SKS coupling)
Equipment non-functional despite
actuating the control buttons
Pressure hose is not coupled
Move power unit control lever to the
"0" position and couple correctly (only
SKS coupling)
Combi tool exhibits movement in the
opposite direction under load
Check non-return valve
Have the equipment checked by
authorised customer services
Oil discharge on the hoses or their
bondings
Hoses leaking, possibly due to damage
Replace hoses, see repair instructions
Degradation of the surfaces of the
hoses
Contact with aggressive chemical fluids Replace hoses, see repair instructions
Oil escaping at the coupling halves
Coupling leaking
Replace coupling, see repair
instructions
Blades loose and gaping apart when
cutting
Attachment of blades to the shearing
head not in accordance with
specifications
Repair by authorised customer service
Tip spread of cutter below target value Shearing head settings incorrect
Repair by authorised customer service
Tip spread of combi tool below target
value
Shearing head settings incorrect
Repair by authorised customer service
Pressure build up despite movement
(open - closed) without any load
Hex nut / central bolt too firmly
tightened
Repair by authorised customer service
Nick or gouge in blade
Blade damaged e.g. through cutting
hardened materials
Can be reground up to approx. 2 mm
(see repair instructions), otherwise
replace
Chip or groove
Blade damaged e.g. through cutting
high-strength materials
Have the blades replaced by authorised
customer services