SEW-Eurodrive M1 N Series, Руководство по сборке и эксплуатации

Страница: 95 / 112

9
Malfunctions
Possible malfunctions/remedy
Assembly and Operating Instructions – M1..N Series Single-Stage Helical Gear Units
95
9.3 Possible malfunctions/remedy
Fault Possible cause Measure
Unusual, regular run-
ning noise
• Meshing/grinding noise: Bearing
damage • Check oil consistency, change bearings
• Knocking noise: Irregularity in the
gearing • Consult SEW‑EURODRIVE
• Deformation of the housing upon
tightening • Check the gear unit mounting for pos-
sible deformation and correct if neces-
sary
• Noise generated by insufficient
stiffness of the gear unit founda-
tion • Reinforce the gear unit foundation
Unusual, irregular run-
ning noises • Foreign objects in the oil • Check the oil consistency
• Stop the drive, contact
SEW‑EURODRIVE
Unusual noise in the
area where the gear
unit is mounted • Gear unit mounting has loosened • Tighten retaining screws and nuts to
the specified torque
• Replace the damaged/defective retain-
ing screws or nuts
Operating temperature
too high • Too much oil • Check the oil level; correct if necessary
• Oil too old • Check when the oil was last changed;
change the oil, if necessary
• Oil is heavily contaminated • Analyze the oil to determine the cause;
take measures, if necessary; change
the oil
• Ambient temperature too high • Protect the gear unit from external heat
sources (e.g. provide shade)
• Gear units with fan: Air intake
opening/gear unit housing con-
taminated • Check air intake openings, clean them
if necessary; clean the gear unit hous-
ing
• Malfunction of the oil-air or oil-
water cooling system • Observe the separate operating instruc-
tions for the oil-water or oil-air cooling
system.
• For gear units with built-in cool-
ing: Cooling liquid flow rate too
low; cooling liquid temperature
too high; deposits in cooling sys-
tem • Check the cooling liquid flow rate;
check the entry temperature of the
cooling liquid; clean the cooling system.
Temperature at bearing
points too high
• Not enough oil • Check oil level; correct if necessary
• Oil too old • Check when the oil was last changed;
change the oil if necessary
• Bearing damaged • Check the bearing and replace it if ne-
cessary. Contact SEW‑EURODRIVE
29203856/EN – 03/2020