Correct
Incorrect
Figure 29: Packing Rings
6.
Expand the first coil as shown and insert into stuffing box. Tamp the packing up against the re-
strictor bushing shoulder firmly with a nylon bar or wood rod. Note, where the cut is positioned.
7.
Assemble the first lantern ring around the shaft and push it squarely into the stuffing box until it
bottoms out against the first ring of packing. Failure to property locate the lantern ring with re-
spect to the flush ports will result in insufficient packing lubrication. Packing and shaft sleeve
damage may result.
8.
Install the second and third coil as required by the sectional drawing, staggering the cuts 90° to
120°.
9.
Assemble the second lantern ring around the shaft and push it squarely into the stuffing box until
it bottoms out on the third ring of packing. Failure to property locate the lantern ring with respect
to the flush ports will result in insufficient packing lubrication. Packing and shaft sleeve damage
may result.
10. Install the third, fourth and fifth packing ring as required by the sectional drawing, staggering the
cuts 90° to 120°.
11. After all packing and lantern rings have been properly installed, insert gland into stuffing box.
Tighten gland nuts finger tight only. The shaft should turn freely.
12. Turn lubricant supply on, start pump, and adjust the gland as described in the operation section
that follows.
13. Periodic maintenance is absolutely required for all packed pumps. Normal shaft run-out should
be under .005" to avoid pounding of stuffing box packing. With excessive shaft run-out, shaft
straightening or replacement is necessary.
Gland Adjustment
Adjust the stuffing box if packing is used. When the pump is first started, there should be considerable
leakage by the gland to cool the packing. Gradually tighten the gland nuts on flat at a time while observ-
ing the leakage and stuffing box temperature. Packing requires time to “run-in” and extra coolant (leak-
age) while it is being “run-in”. If the leakage is reduced too quickly, the packing will overheat and may be
destroyed. The shaft sleeve may also be damaged.
Leakage
Normal leakage for a properly adjusted box, depending on shaft size and speed, varies from a few drops
a second to a small trickle out of the gland.
9.1 Special Packing Arrangement
78
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual