Bell & Gossett MK MV (8201, 8201X) - Manual (Page 35)

Type of service Purpose Inspection interval
to secure performance and pump
efficiency are defined and decided
for each individual application. It
can include such things as impeller
trimming, wear part control and
replacement, control of zinc-anodes
and control of the stator.
conditions at media (liquid)
temperatures <40°C.
Major overhaul To secure a long operating lifetime
for the product. It includes
replacement of key components
and the measures taken during an
inspection.
Up to every 3 years. This interval
apply to normal applications and
operating conditions at media
(liquid) temperatures <40°C.
NOTICE:
Shorter intervals may be required when the operating conditions are extreme, for example
with very abrasive or corrosive applications or when the liquid temperatures exceed 40°C
(104°F).
Inspection
Service item Action
Cable 1. If the outer jacket is damaged, replace the cable.
2. Check that the cables do not have any sharp bends and are not
pinched.
Connection to power Check that the connections are properly tightened.
Electrical cabinets Check that they are clean and dry.
Impeller 1. Check the impeller clearance.
2. Adjust the impeller, if necessary.
Stator housing 1. Drain all liquid, if any.
2. Check the resistance of the leakage sensor.
Normal value approximately 1530 ohms, alarm approximately
330 ohms.
Insulation Use a megger maximum 1000 V.
1. Check that the resistance between the earth (ground) and
phase lead is more than 5 megohms.
2. Conduct a phase-to-phase resistance check.
Junction box Check that it is clean and dry.
Lifting device Check that local safety regulations are followed.
Lifting handle 1. Check the screws.
2. Check the condition of the lifting handle.
3. Replace if necessary.
O-rings 1. Replace the oil plug O-rings.
2. Replace the O-rings at the entrance or junction cover.
3. Grease the new O-rings.
Maintenance
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 33