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6 Maintenance
3. Remove the seal flushing line.
4. Remove the volute capscrews.
5. Remove the pump assembly from the volute.
6.2.4 Remove the impeller
WARNING:
Never apply heat to remove an impeller. The use of heat may cause an explosion due to
trapped liquid, resulting in severe physical injury and property damage.
CAUTION:
Wear heavy work gloves when you handle impellers. The sharp edges can cause physical
injury.
1. Remove the impeller capscrew.
2. Remove the lockwasher and the washer.
3. Remove the impeller.
6.2.5 Remove the mechanical seal (e-580-F)
1. Remove the rotating portion of the seal.
If necessary, use a screwdriver to loosen the rubber ring.
2. Remove the seal insert, the insert gasket, and the retainer if it is used.
6.2.6 Remove the single mechanical seal (e-580-S)
1. Remove the screws from the seal gland.
2. Remove the coverplate screws.
3. Remove the coverplate from the bracket.
4. Remove the seal assembly.
6.2.7 Impeller trimming guidelines
Machining
When it is necessary to reduce the pump flow rate and generated head by trimming the
impeller diameter, the following guidelines apply for stainless steel impellers:
• Review the pump hydraulic selection data and consult your local Xylem representative
to select the proper reduced diameter.
• For the e-580 5x5x7B model, before trimming the impeller refer to the angle cut
guidelines below.
• For machining recommendations, see P2002535 Stainless Steel Impeller Trimming
Guidelines.
Balancing
It is recommended that impellers trimmed more than 5% in diameter be rebalanced per
ISO 1940 grade G6.3.
Angle cut guidelines
Model e-580 5x5x7B pump impellers must be angle cut at reduced diameters according
to the following information.
20
WARNING:
Pressurized device. Make sure that the internal pressure is relieved
before you continue.
Marlow Series e-580 INSTRUCTION MANUAL
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