F-1031, Section 2109.1
Page 12 of 13
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 the packing ring I.D. and O.D. with
mineral oil, automotive grease or engine oil for in-
stallation 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 9.
Note: Be sure that the packing joints are stag-
gered at least 90
apart.
6. Install packing glands, nuts and washers. Tighten
gland nuts one flat beyond finger tight, see Figure
9.
Note: The milled slot on the nut should face the
gland.
7. Adjust packing as required per instructions on the
next page.
Figure 9. Packing and Gland Installation
Packing Adjustment
The pump packing is designed and adjusted to drip
slightly during operation. This is to cool and lubricate the
packing. It is desirable to adjust the stuffing box to main-
tain a leakage rate of 10 to 120 drops per minute when
operating at a discharge pressure of 150 psi (10.3 bar).
Leakage through the braided flexible graphite (BFG) pack-
ing 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 packing gland
and stuffing box and pump body may reach high tempera-
tures during this time, the impeller shaft will be protected
from heat damage.
1. Engage pump per appropriate operating instruc-
tions. Operate the pump at the capacity pressure
shown on the serial plate for ten (10) minutes.
2. Observe leakage. Normal leakage is 10-120 drops
per minute.
3. If drip rate is considered high, stop the engine and
tighten the packing gland nuts 1/2 to 1 flat (maxi-
mum of 1/6 of a revolution). Make appropriate ad-
justments starting with 1 flat, when approaching
the final adjustment reduce to 1/2 flat. This reduces
the possibility of over tightening.
Tighten the
gland nuts equally to ensure that the packing
gland goes on straight.
Gradually reducing leak-
age during the first hour of operation will result in a
better seal over a longer period of time.
4. Operate the pump at the capacity pressure shown
on the serial plate for two (2) minutes to let packing
run in, then observe the drip rate.
CAUTION
Stopping the leakage entirely at this point will
cause the packing to overheat.
CAUTION
Observe the stuffing box drip rate from the side
of the truck.
!
WARNING
Truck movement hazard. May cause serious per-
sonal injury.
Stop engine, set the parking brake and chock the
wheels before going under truck to remove packing.
CAUTION
Pump overheating hazard. May cause damage to
the pump.
Circulate enough water through the pump to prevent
overheating.
NOTICE
NOTICE
NOTICE
