F-1031, Section 4202
Page 8 of 10
CAUTION
Pump overheating hazard.
May cause damage to the pump.
Circulate enough water through the pump to prevent overheating. Do
not pressurize the pump over the rated maximum discharge pressure
of the pump.
3.
If all packing is not forced out, it may be necessary to remove the re
maining packing by hand, using a pick or similar device. Waterous has
a packing removal tool (P/N 5782) available for this purpose, see Fig
ure 2.
4.
Replace packing per instructions on the next page.
Figure 2. Packing Removal Tool
Packing Installation
1.
Before installing the new packing, be sure that all of the old packing is
removed from the stuffing box.
2.
Be sure that the stuffing box and the shaft are clean and free of any
packing residue.
3.
Lightly lubricate that packing ring I.D. and O.D. with mineral oil, auto
motive grease or engine oil for installation purposes.
4.
Make sure the packing is clean.
5.
Carefully install one ring of packing. With the aid of packing glands,
push the packing into the stuffing box as far as possible. Repeat this
operation with each ring, staggering the joints at least 90
_
apart.
Install the packing rings until the top of the last ring is about 1/4 inch
from the end of the stuffing box (at least 1/8 inch is required for the
packing gland nose entrance into the stuffing box), see Figure 3.
NOTE: Be sure that the packing joints are staggered at least 90
_
apart.
6.
Install packing glands, nuts and washers. Tighten gland nuts one flat
beyond finger tight, see Figure 3.
NOTE: The milled slot on the nut should face the gland.
7.
Adjust packing as required per instructions on the next page.
Figure 3. Packing and Gland Installation
Packing Adjustment
The pump packing is designed and adjusted to drip slightly during opera
tion. This is to cool and lubricate the packing. It is desirable to adjust the
stuffing box to maintain a leakage rate of 10 to 120 drops per minute when
operating at a discharge pressure of 150 psi.
Leakage through the braided flexible graphite (BFG) packing may be at
zero or diminish to zero leakage and may not respond to loosening of the
packing nuts to restore leakage. (See Adjustment Step 3.) While the pack
ing gland and stuffing box and pump body may reach high temperatures
during this time, the impeller shaft will be protected from heat damage.
