7 Servicing/Maintenance
63 of 80
HPK
1121.8/06-EN
Fitting a gland packing made of pure graphite
Fig.19: Packing arrangement
Table26: Number of packing rings
Bearing bracket P02as, P03s, P03as,
P04s, P04as
P05s, P05as, P06s,
P06as
P08s
x
max
12)
in mm
13 16 19
Number of packing
rings
6 5,5 5,5
ü The old packing rings have been removed.
ü The gland packing chamber and shaft protecting sleeve have been thoroughly
cleaned.
ü Any damaged or worn parts have been replaced by original spare parts.
1. Use the stuffing box ring (part D) to insert the ring halves in pairs.
Displace each cut edge by 90° in relation to the previous one.
CAUTION
For safety reasons, the value xmax. must not be exceeded.
2. Press the required number of packing rings hand-tight onto each other.
3. Fit the gland follower at a right angle to the shaft and make sure it is properly
centered.
4. Gently tighten the hexagon nuts at the gland follower by hand.
7.5.4 Fitting the impeller
ü The notes and steps stated in (ðSection7.5.1,Page59) to
(ðSection7.5.3,Page61) have been observed/carried out.
ü The assembled bearing/mechanical seal as well as the individual parts are kept in
a clean and level assembly area.
ü All dismantled components have been cleaned and checked for wear.
ü Any damaged or worn parts have been replaced by original spare parts.
ü The sealing surfaces have been cleaned.
ü Impeller bore, shaft and keyways are clean and free from burrs.
1. Insert keys 940.01 into the shaft keyway.
2. Insert joint ring 411.32.
3. Coat the impeller with a suitable lubricant.
4. Slip impeller 230 onto shaft 210.
5. Insert joint ring 411.31.
6. Screw impeller nut 922 to shaft 210.
12
x = Clearance between casing cover and gland follower