Goulds Pumps AF (Axial Flow) (42"/1200mm/54/60"/66") LM/LMR Bearings - IOM" - Manual (Page 62)

62 AF (42-66) IOM
INSTALLATION
1. Be sure the stuffing box and shaft sleeve (126)
must be clean and free of grit.
2. A Teflon restrictor bushing is used in the bottom of
the box and is installed similar to packing (see Fig. 26).
With the restrictor bushing wrapped around the shaft,
push it squarely into the stuffing box until it bottoms out.
Be sure the ends have not separated and that it sits
square in the bottom of the box. Note, where the cut is
positioned.
3. Form packing over a mandrel of same shaft
diameter and carefully cut packing to length. Discard
rings cut too short.
4. Pre-form each ring by coiling 1 -1 /2 turns.
5. To install packing rings, do not pull straight.
Expand the coil as a coil spring, see Fig 26 for the
correct and incorrect method of installing packing.
6. Expand the first coil as shown and insert into
stuffing box. Tamp the packing up against the restrictor
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 respect 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 observing
the leakage and stuffing box temperature. Packing
requires time to “run-in” and extra coolant (leakage)
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.
PACKING RINGS
CORRECT INCORRECT
Fig. 26