
Trouble shooting
02.00|WDB 99 |en
53
Possible cause
Remedial measures
The module was not operated with oiled
compressed air
Install maintenance unit with oiler
Hose diameter below minimum
Required hose diameters, see
The turbo connection is still pressurized Ventilate connection on the base module or
basic module
Clamping module not completely opened Manual actuation counter-clockwise to the
drive until the end position is reached
The quick-change pallet system or the pneumatic compensation
module no longer opens quietly
Possible cause
Remedial measures
The clamping faces on the clamping slides
and on the clamping pin are dirty
Remove the clamping pin and clean the
clamping faces on the clamping slides and on
the clamping pin
The manual quick-change pallet module NSE-M plus 99-ZL (WDN-
M 99-70) no longer works flawlessly
Possible cause
Remedial measures
A component is broken (e.g. due to over-
loading)
Replace the module or send it to SCHUNK for
repair
Hexagon socket of the actuator screw is
defective
Replace actuator screw or send module to
SCHUNK for repair
The WDA 99-79 D32 compensation module no longer clamps
properly
Possible cause
Remedial measures
Actuating screw is stiff
Send the module to SCHUNK for repair
Hexagonal drive on the actuating screw
defective
Send the module to SCHUNK for repair
Clamping pin can be turned or pushed in
clamped clamping point
Check tightening torque specification, (see
chapter "Technical Data - hydraulic compen-
Clean clamping intake in the compensation
module. Check clamping bolt stem for wear. If
the defect cannot be fixed, send the module to
SCHUNK for repair