Recommended Spare Parts - Grundfos KP Notice D'installation Et De Fonctionnement

8.3.2 Split coupling removal and replacement (KPVS)
Removing the coupling guard (KPVS)
1. Shut off the liquid supply to the pump.
2. Remove the coupling guard.
3. Drain the liquid from the pump. The pipe plug on both top and
bottom seal housings can be used to drain the pump.
4. Turn the jacking screw (114) clockwise to engage and support
the shaft. Do not raise the height of the shaft to support it at its
current location. Note, the jacking screw has an O-ring which
seals against the seal housing when turned counterclockwise
until it bottoms out.
5. Remove nuts and bolts from the split coupling (203) and
remove each half of the split coupling from the pump and
motor shafts.
Reinstalling the coupling guard (KPVS)
1. Engage the half of the split coupling with the keyways to the
motor shaft and shaft collar (204).
2. Use the jacking screw (114) to adjust the pump shaft up or
down to align the pump shaft groove with the coupling.
3. Engage the coupling fully to both the motor and pump shafts.
4. Engage the second coupling half to both the motor and pump
shafts.
5. Install the coupling screws and nuts and tighten to 21 ft-lbs.
6. Turn the jacking screw counterclockwise until it bottoms out
and seals against the seal housing.
7. Reinstall the pipe plugs into the upper and lower seal
housings.
8. Reinstall the coupling guard.
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8.3.3 Bearing and seal replacement (KPVS)
1. Remove the coupling guard and coupling. See section
8.2.2 Bearing, seal and packing
2. Remove the seal housing cap screws and the seal housing
(124a).
3. Remove the seal head assembly (105) from the shaft (51).
Apply water-soluble lubricant to the shaft to ease the removal
of the seal head. Pull the seal head assembly from the shaft,
using a slight twisting motion (as necessary) to loosen the
bellows from the shaft.
4. Discard the old seal, spring and retainer.
5. Remove and discard the old seal seat and gasket from the
seal housing (124a) and thoroughly clean the inside cavity of
the seal housing and flange.
6. The interior surface of the bellows on the new shaft seal is
coated with a bonding agent that adheres to the pump shaft.
When the old shaft seal is removed, the bellows may crack or
split during removal. We recommend that you install a new
mechanical shaft seal if it becomes necessary to remove the
existing shaft seal from the shaft.
7. Clean and lubricate the shaft (51) with a water-soluble
lubricant and make sure that no sharp edges can cut or
scratch the bellows of the new shaft seal.
8. Install the new gasket onto the seal housing.
9. Press the new shaft seal seat firmly into the seal housing.
Avoid direct contact between the seal face and metallic or
abrasive objects, and wipe the seal face clean after
installation to ensure an abrasive-free sealing surface.
10. Slide the new shaft seal assembly onto the shaft by applying
even pressure to the base of the assembly.
11. Reinstall the seal housing and screws.
12. Reinstall the coupling and coupling guard. See section
8.2.2 Bearing, seal and packing

8.4 Recommended spare parts

The recommended spare parts depend greatly on the run time
and application of the pump. As a minimum, we recommend that
you keep the following kits:
• Shaft seal kit
• Bearing kit.
• Gasket kit.
replacement.
replacement.