ASSEMBLY (PUMP WITH PACKING)
All bearings, O-rings, seals, gaskets, impeller rings, and casing wear rings should be replaced with new parts during assembly. All reusable parts should be cleaned of all foreign matter before reassembling. The main casing joint gasket can be made using the upper or lower half as a template. Lay the gasket material on the casing joint and mark it by pressing it against the edges of the casing. Trim the gasket so that it is flush with the inside edges of the casing.
NOTE: Precut casing gaskets (2-153-5, -6) can be ordered to minimize the amount of trimming.
1.Place impeller key (3-911-1) in shaft (3- 007-0).
2.Identify the first and second stage impellers (4-002-0) by the cast label. For clockwise rotation, locate the second stage impeller on the shaft per Figure 11 dimension ‘A’. For counter-clockwise rotation, locate the first stage impeller per Figure 12 dimension ‘A’.
3.Pre-assemble interstage bushing (3-034-
0)and diaphragm (3-231-0) assembly as follows:
a)Install O-rings (3-914-7, -8) in the three grooves on the interstage bushing.
b)Lightly press the bushing into the diaphragm, locating the hole in the bushing over the pin in the diaphragm. Install snap ring (3-915-0) to secure assembly.
4.Slide interstage busing assembly over shaft and place over the rear hub of the impeller.
5.Place the other impeller on the shaft and slide under the interstage bushing until it touches the impeller already installed.
Verify dimension ‘A’ is maintained. See Figure 11 or 12.
6.Apply RTV (Dow Corning Silicone Sealant or equivalent) uniformly about shaft sleeve (3-009-9) inside diameter, covering an area of about 1/2 inch at each impeller end of sleeve. Also, apply sealant to the face of the impellers.
7.Slide shaft sleeves onto shaft, rotating the sleeves to evenly distribute the sealant applied in above step. Rotate until pin in
sleeve engages into keyway of impellers and push sleeves against impeller face until the sleeve is flush against the face. Wipe off any excess sealant.
8.Place the sleeve O-ring (3-914-9) onto shaft and place in sleeve counterbore. Verify that dimension ‘A’ is maintained, then using a pin spanner wrench and hammer, securely tighten the shaft sleeve nuts (3-015-9). Drill a shallow recess in the shaft through the set screw hole in each of the shaft sleeve nuts. Stake each shaft sleeve nut in position with cup point set screws (3-902-9).
9.Slide casing rings (3-003-9) onto the impellers.
10.Place two O-rings (6-914-9) on each stuffbox bushing (6-008-0), then slide over shaft sleeve with the beveled end facing the impeller.
11.Start heating bearings (3-026-3, -4) so they will be ready to use in a later step. Use dry heat from induction heat lamps or electric furnace, or a 10 - 15% soluble oil and water solution.
CAUTION:
DO NOT EXCEED 275°F. Failure to follow these instructions could result in injury or property damage.
CAUTION:
These are precision, high quality bearings. Exercise care at all times to keep them clean and free from foreign matter. Failure to follow these instructions could result in injury or property damage.
12.Assemble lip seal (3-177-9) in each bearing cap (5-018-0). Seal lip or pressure side of seal must point away from the end of the shaft the lip seal is assembled on.
13.Slide deflectors (3-136-9) and bearing caps on the shaft. Install snap ring (5-915- 3) on the inboard side of shaft. Install the split ring (5-050-4) and retaining collar (5- 421-4) on the outboard side of shaft.
14.Using gloves, install the double row ball bearing on the inboard side and locate against snap ring.
15.Using gloves, install the two angular contact bearings on the outboard end of shaft. These bearings must be installed “back to back” (wide shoulders of outer
