Wilo Atmos TERA-SCH Installation And Operating Instructions Manual page 41

Fig. 29: Example of a diagonal cut
Fig. 30: Example of a straight cut
Installation and operating instructions Wilo-Atmos TERA-SCH
Maintenance/repair
NOTICE
Change the gasket each time when the pump is opened!
Gland pack version
ƒ
Prepare a new gasket from 0.25-mm thick black joint paper or similar gasket mater-
ial.
ƒ
Lift the rotor assembly and place it on the bottom pump housing (22).
ƒ
Locate the new gasket on split flange of bottom half housing.
ƒ
Make sure the wear ring dowel pin (27) provided to the wear ring (25) sits properly in
its respective sit.
ƒ
Screw the bearing end covers (5, 30) to the bearing housings (2, 33) and bearing
housing to the bottom housing (22).
ƒ
Pull water thrower (6), gland cover (37), and logging ring (39) towards the bearings
(3) on both sides.
ƒ
Check and ensure the proper position of the impeller. If adjustment is required, do it
by loosing/tightening sleeve nuts (36) on either side of the impeller.
ƒ
Place all the bolts for split flange (15) at their respective positions
ƒ
Place the top half housing (20).
ƒ
Insert the dowel pins (23) of the housing.
ƒ
Insert the bolts (1) for bearing housing at respective their position.
ƒ
Tighten the bolts with a torsion bar with the proper sequence. For tightening
torques, see chapter "Screw tightening torques".
ƒ
Check the proper position of the wear ring (25).
ƒ
Stuff the needed number of gland pack rings in the stuffing box. For proper cutting
procedure of packing rings, see accompanying figures.
ƒ
Press in the logging ring (39) and stuff in remaining gland pack rings.
ƒ
Place the gland cover (37) at its position and tighten its bolts (40) hand tight. Check
for free rotation of the shaft.
Pump Gland
packing
size
2
[mm ]
12.7
SCH 150-230
16
SCH 150-555
12.7
SCH 200-320
16
SCH 200-500
12.7
SCH 250-360
16
SCH 250-380
Table 18: Table for gland packing details
Mechanical seal versions
ƒ
Prepare a new gasket from 0.25-mm thick black joint paper or similar gasket mater-
ial.
ƒ
Lift the rotor assembly and place it on the bottom pump housing (22).
ƒ
Locate the new gasket on split flange of bottom half housing.
ƒ
Make sure the wear ring dowel pin (27) provided to the wear ring (25) sits properly in
its respective sit.
ƒ
Screw the bearing end covers (5, 30) to the bearing housings (2, 33) and bearing
housing to the bottom housing (22).
ƒ
Pull water thrower (6), gland cover (37), and logging ring (39) towards the bearings
(3) on both sides.
ƒ
Check and ensure the proper position of the impeller. If adjustment is required, do it
by loosing/tightening sleeve nuts (36) on either side of the impeller.
ƒ
Place all the bolts for split flange (15) at their respective positions
ƒ
Place the top half housing (20).
ƒ
Insert the dowel pins (23) of the housing.
ƒ
Insert the bolts (1) for bearing housing at respective their position.
ƒ
Tighten bolts (15) and (1) with a torsion bar with the proper sequence. For tighten-
ing torques, see chapter "Screw tightening torques".
Packing Pump
ring
quantity
4
SCH 250-470
4
SCH 300-430
4
SCH 350-500
4
SCH 400-490
4 SCH 400-550
4
en
Gland Packing
packing ring
size quantity
[mm]
16 4
16 4
16 4
16 4
16 4
41