Recommendation:
For maintenance the following spare
part sets are recommended:
Set: To be used:
G057 Joint kit
For dismantling the pump.
G053 Minor kit
For service.
G054 Major kit
For repair after damage or greater
wear.
Ordering example:
For IMO-pump ACE 032N3 NVBP,
serial number 456789:
Shaft seal pos G050 p/n 194030
Valve element pos G070 p/n 189873
Item Spare Parts sets 025 032 038
G012 Rotor set CW-rotation (std)
Low lead-L3 190486 190485 –
Low lead-K3 – – 190482
Normal lead-N3 190487 190484 190483
High lead-D3 – – 192698
G011 Rotor set CCW-rotation
Normal lead-N3 190492 190491 190488
G050 Shaft seal-xVxx 194030 194030 194030
Shaft seal-xTxx 190495 190495 190497
G053 Minor kit-xVxx 190501 190710 190500
Minor kit-xTxx 190503 190712 190499
G054 Major kit=G012(G011)+G053+G070
G057 Joint kit-xVxx 190525 190714 190522
Joint kit-xTxx 190524 190713 190523
G070 Valve element 189873 189873 189873
125 Secondary seal xTxx 190469 190469 190468
Part numbers for pump size
Ordering code
Inspection of shaft seal
Excessively leaking shaft seals (more than 10 drops
per hour) should be changed without delay, as the
leakage normally will grow worse and cause addi-
tional damage.
In installations where unplanned shut downs must
be avoided, it is advisable to dismantle the pump for
a thorough inspection and thereby change out shaft
seal and ball bearing, every three years as a max
period.
It is recommended always to have the spares in-
cluded in minor spare part kit available.
Inspection of rotors
A quick inspection of the idler rotors can be made
simply by removing the rear cover. Note that the
driver must be deenergized and the pump hydrauli-
cally isolated before the rear cover is removed.
If a more thorough investigation is needed, proceed
as under ”Dismantling/Reassembly”.
Service intervals
The intervals for inspection and replacement of wear
parts vary greatly with the properties of the pumped
liquid and can only be determined by experience.
Pumping liquid which contains abrasive materials,
or liquid that is corrosive, will signicantly reduce
service life and call for shorter service intervals.
Wear will normally show as unnormal:
• Vibration
• Noise
• Loss of capacity
• Reduction in ow/pressure
• Leakage
If the pumps operating temperature ex-
ceeds 60°C let the pump cool off before
any service, maintenance or dismantling
work is commenced to avoid burn injury.
Product Specification Sheet
X-Cel House, Chrysalis Way, Langley Bridge, Eastwood, Nottinghamshire NG16 3RY
Tel: +44 (0) 1773 302 660 | Email: sales@northridgepumps.com | Website: www.northridgepumps.com
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