38
Malfunctions
Loss of operating flu-
ids in pump and oiler
Leaking O-ring in pump dome
Check for tightness; replace O-ring, if nec-
essary
Leaking radial shaft seal ring
Check seal ring and replace, if necessary
Operation-related loss of operating
fluids; operating fluid in exhaust
lines
Install oil mist filter and oil return unit, if nec-
essary
Unusual noises during
operation
V-belt tension too low
Check V-belt tension
Dirt in silencer
Clean or replace the silencer.
Damage in pump system
Clean and overhaul pump; notify Pfeiffer
Vacuum service department, if necessary.
Motor bearing defective
Replace motor; notify Pfeiffer Vacuum ser-
vice department, if necessary
Problem
Possible causes
Remedy
NOTICE
Service work should be carried out by a qualified person only!
Pfeiffer Vacuum is not liable for any damage to the pump resulting from work carried out
improperly.
Take advantage of our service training programs; additional information at www.pfei-
ffer-vacuum.com.
Please state all the information on the pump rating plate when ordering spare parts.
