ITT GOULDS PUMPS 3316, Инструкции по установке, эксплуатации и обслуживанию

Страница: 49 / 51

7.13 Emergency ball bearing replacement
If the thrust end ball bearing (112) has become worn and needs replacing and it is not desirable to over-
haul the entire pump, the bearing can be replaced as follows:
NOTICE:
This cannot be done on the coupling end unless the pump or the driver is removed from the
bedplate, or unless a spacer coupling is used.
1. Remove constant level oiler from thrust end bearing housing (134). Drain oil from housing.
2. Remove thrust bearing end cover (109).
3. Remove shaft nut (110).
4. Remove bearing cap (111).
5. Rotate bearing housing (134) 180° so that the two locks are on the top.
6. Remove ball bearing as directed in 7.5 Dismantling of pump on page 32 , Steps 13 and 14.
7. Thoroughly flush bearing housing, bearing end cover, shaft nut and end of shaft with clean kero-
sene. The slightest trace of dirt or grit may drastically reduce the life of a ball bearing.
Examine the shoulder on the shaft against which the ball bearing bears. Shoulder must be square,
and not rounded over.
8. Assemble new ball bearing as follows:
a) Wipe a small amount of grease on the oil seal lips in the bearing housing.
b) Place bearing housing on shaft, with the double locks up, and slide it along to approximately its
correct location.
c) Apply a film of oil to the bearing seat on the shaft. Start bearing "square" and tap on shaft up to
the shaft shoulder. Use a driving sleeve as shown in
Figure 21: on page 41 and Figure 22: Left
hand pump on page 42 .
d) Screw shaft nut (110) tight against bearing.
e) Align locks on bearing end cover with the grooves in lower half casing and rotate bearing end
cover 180° so that the locks are at the bottom.
f) Bolt bearing end cover (109) to bearing housing. Be sure gasket (360) is in place. Position end
cover as directed in Section
7.11 Reassembly of pump on page 41 , Step 20 so that relief fitting
is in correct location.
g) Assemble bearing cap (111) being sure that the prick punch marks on the cap and the casing
are on the same side. Now tighten the nuts evenly.
h) Check thrust bearing end play, as directed in Section 7.11 Reassembly of pump on page 41 ,
Step 30.
i) Refill with oil as outlined in 3.1 Pump bearings on page 18 .
7.14 Spare parts
To ensure against possible long and costly "down-time" periods, especially on critical services, it is advis-
able to have spare parts on hand.
1. The most desirable parts to have on hand are the following:
a) "Rotating element." This is a group of assembled parts, including bearing housings, bearings,
bearing end covers, oil seals, wearing rings, diaphragm, stuffing box bushings and all rotating
parts, except coupling.
b) Stuffing box packing (106) - one set for two stuffing boxes.
7.13 Emergency ball bearing replacement
3316 Installation, Operation and Maintenance Instructions 47