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Model 1620F End Suction Fire Pumps
Instruction, Installation, Maintenance and Repair Manual
PUMP REASSEMBLY:
1. Replace the shaft sleeve (25) or packing cover (26) if there is evidence of surface damage like pitting, corrosion,
nicks or scratches.
2. Replace wear ring(s) (7 & 16) in casing (6) and cover (26). Rings should not be hammered into place. Use a
press or clamp the parts in a bench vice using wooden blocks to protect the rings.
3. Place one ring of packing (28) into the packing cover (26). On successive rings of packing stagger the packing
joints to prevent excessive leakage through the packing box. If a lantern ring (29) is used, place a second ring of
packing (28) into the cover before installing lantern ring. Refer to Fig. 10.
There must be two (2) rings of packing in front of lantern ring (29) to assure proper alignment between the
lantern ring and the sealing tube connection (3) in the cover (26). Install remaining packing rings (28). Each
ring should be tapped firmly into place with a wood or metal bushing.
4. Slide the shaft sleeve (25) through the packing. Proceed to next step if only replacing packing.
5. Replace gland halves (23) and place capscrews (65) through gland clamps (22). Tighten capscrews (65) finger
tight into either cover assembly (26).
6. Slide Packing Cover Assembly onto shaft.
NOTE: The slots in gland halves (23) should be diagonal
to pump horizontal center line.
7. Install O-ring (10).
8. Install a new impeller key (12).
9. Install impeller, impeller washer (9A), new impeller
washer gasket (9B), capscrew seal and capscrew (9).
Tighten capscrew per torque chart (see Table 2).
WARNING: Lifting Hazard
The motor and pump assemblies may be very heavy. Use
extreme caution and safe lifting equipment during the
removal and assembly procedures. Failure to follow these
instructions could result in serious personal injury, death or
property damage.
10. Install new casing gasket (8). Then install the pump assembly into the volute.
11. Tighten volute capscrews (5) per torque chart (see Table 2).
12. Install foot support capscrews (62) and tighten per torque chart (see Table 2).
13. Install coupling and align.
14. Install drain plugs, close drain valve.
15. Replace all relief, cooling, flush lines (1, 3, 2, 75), or drain lines from the pump including compression
connections (1 and 2) and tubing (3).
12/26/12
CAUTION:
CAPSCREW
CLAMP
GLAND
LANTERN
PACKING
PACKING
RING
Figure 10. Packing.
Fairbanks Nijhuis™
17
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