7 Care and Maintenance
7.1 Lubrication
1.
Grease lubricated bearings.
As specified in
, bearings are lubricated at the factory for 2000
hours or three months service. Do not grease at too frequent intervals. It is suggested that addi-
tional or replacement lubricant be added only after 2000 hours operation or at three month inter-
vals.
Insert grease through Alemite fittings (193) into bearing housing until grease appears through re-
lief fitting (113). Do not add additional lubricant after grease appears through relief fitting.
The lubricant should be renewed in the housings at least once annually. This should be done
when annual overhaul is made.
The ball bearing grease should be a sodium or lithium base, NGLI #2 consistency. Do not use
graphite.
2.
Oil lubricated bearings.
1.
Keep oiler bottle filled with correct grade oil. Refer to
. Oil-
er will maintain constant oil level in frame.
2.
Every four weeks,drain oil from frame, and flush with kerosine. Refill frame as directed in
.
3.
If oiler adjustment is lost or disturbed, reset as directed in
7.2 Repacking stuffing box
1.
Loosen gland nuts and slide gland along shaft out of stuffing box. Remove gland halves from
pump.
2.
Remove the outer rings of packing with the aid of a packing hook.
3.
Remove lantern ring (105) by inserting a wire hook in the slots in the outer edge of the ring and
pulling ring from box.
4.
Remove the three inner rings of packing with the aid of a packing hook.
5.
Remove all foreign matter from stuffing box.
6.
Install stuffing box packing as described in
.
7.3 Replacing shaft sleeve
The shaft sleeve must be in good condition to effectively seal the fluid through the stuffing box.
1.
Shut off and disconnect all piping including seal piping to stuffing box if supplied.
2.
Drain liquid from pump.
3.
Unscrew nuts from studs (356) is casing and remove suction cover (182).
4.
Remove impeller nut (304) and impeller washer (199) from shaft.
5.
By use of a suitable puller similar to that shown in
Figure 10: Impeller puller on page 28
impeller from shaft ( puller must push against shaft as shown. Do not use a type that pulls from
casing). All impellers are provided with two tapped holes to facilitate use of puller. If key (178)
remained in shaft, remove it.
7 Care and Maintenance
Model 3755 Installation, Operation, and Maintenance Manual
27
