Goulds Pumps 3180-86 - IOM - Manual (Page 100)

178 101
412A
304
412F
7. Prevent the coupling end of the shaft from turning and torque the impeller nut to the specified
amount in the Maximum torque values for fasteners table in the Reassembly section of the
Maintenance chapter.
CAUTION:
Failure to torque the impeller nut can result in serious mechanical damage.
Install an enclosed impeller
1. For the S, M, L, and XL sizes, install the wear ring (202) on the impeller and align the holes.
320
202
101
2. Apply an anti-galling compound, such as Loctite Nickel Anti-seize, to the socket head capscrews
(320), and install and tighten.
For the S, M, L, and XL sizes, thread sealer is used to ease future disassembly.
3. Turn the impeller ring OD to the dimensions shown in Radial ring clearances for enclosed impellers,
found in the Commissioning, Startup, Operation, and Shutdown chapter.
For the S, M, L, and XL sizes, it might be necessary to drill and tap new holes for wear ring screws. In
this case, use the wear ring as a drilling template and offset (rotate) away from any previous holes.
4. Install the shaft key (178) on the shaft (122).
5. Fit the sleeve O-ring (412F) on the shaft sleeve (126).
6. Apply a liberal coating of an anti-galling compound, such as Loctite Nickel Anti-seize, to the impeller
bore and shaft.
7. Apply a coating of Loctite 272 approximately 1/8 in. wide along the entire thread length.
8. Slide the impeller (101) onto the shaft and make sure that the sleeve O-ring (412F) stays in the groove.
9. Fit the O-ring (412A) into the impeller nut (304) and install it on the shaft.
Maintenance
98 Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual