Watson-Marlow MR 160 - Manual (Page 13)

N:\Konstruktion\Betriebsanleitungen\AKTUELL\MR Serie\TDE MR160.doc Revision 4 January 13 13
19 Troubleshooting
Error Cause Remedy
Pump does not draw in
Direction of rotation not correct Check direction of rotation
No wetting liquid in the pump Fill pump with liquid
Screw fastening not tight Check screw fastening
Suction pipe too long Adapt suction pipe
Pipe cross-section too narrow Adapt suction pipe
Shaft seal leaking Check all seals for damage
Wear in the pump Change wearing parts
Motor speed not correct Measure, regulate speed
Scraper and cartridge wrongly
inserted Check position (see changing
direction of rotation)
Pump does not deliver
Direction of rotation not correct Check direction of rotation
Suction and pressure pipe
confused Check pipe system
Motor speed not correct Check speed based on output
diagrams
Wearing parts worn Replace wearing parts
Scraper and cartridge wrong Check position (see changing
direction of rotation)
Inserted closed gate valve Check pipe system
Pump is noisy
Noises come from the drive Consult WATSON-MARLOW
Noises come from the pump Consult WATSON-MARLOW
Suction pipe too small (cavitation) Shorten suction pipe or increase
diameter, reduce speed
Knocking noises from the pump
head Gate valve wear
Noises from bearing block Fill oil, change tapered roller
bearings
Coupling not aligned Align coupling with hairline
Pump leaking at leakage
hole
Shaft seal leaking Change GLRD or radial shaft
sealing rings
O-ring seal leaking Replace O-ring
Radial shaft sealing ring on the
bearing block leaking, oil escapes Dismantle bearing block,
replace radial shaft sealing rings
Pump leaking at the front
housing
Housing seal not or wrongly
installed Install housing O-ring correctly or
replace
Housing seal defective Install housing O-ring correctly or
replace