11
PN524 (08-01-20)
SERVICE
ASSEMBLY
Please refer to the exploded view on Page 14 for Key No.
references.
1. Clean and straighten the Pump Shaft (Key No. 27) until TIR is
50 to 100 microns (.002” to .004”).
2. Slide the Coupling (Key No. 28) onto the Pump Shaft until
the end of the shaft aligns with the end of the hex portion of
the coupling. Lock the Coupling to the Pump Shaft with two
Allen Screws (Key No. 29).
3. Install the Shaft in the Suction Bracket.
4. Bolt the Suction Bracket and shaft onto the Assembly
Fixture (See Figure 7 for Fixture spec ifications). Make sure
that the Shaft Assembly is correctly aligned and is down
solidly on the Fixture.
5. Install the First Stage Adapter (Key No. 20) on the Suction
Bracket.
6. Slide the Inlet Shaft Spacer (Key No. 19) down over the Shaft
and seat it on the Coupling.
7. Slide an Impeller (Key No. 8) over the Shaft until it rests
on the Inlet Shaft Spacer. Follow it with the Thrust Shaft
Spacer,Thrust Washer, Distance Sleeve, Fiber Washer,
and Stainless Washer (Key Nos. 15, 14, 11, 13, and 12), in that
order.
8. Slide the first stage Bowl (Key No. 9) down over the Shaft
and seat it on the Suction Adapter.
9. Check the axial clearance of the pump shaft (2.5 to
3 mm or 3/32 to 1/8”).
10. Slide an Impeller (Key No. 8) over the Shaft until it rests on
the Distance Sleeve. Follow it with a Stage Spacer (Key No.
10).
11. Slide the next Bowl over the Shaft and seat it by gently
tapping it with a rubber mallet.
12. Slide an Impeller over the Shaft until it rests on the Stage
Spacer. Follow it with another Stage Spacer.
13. Repeat steps 8, 10, 11 and 12, until you have installed all the
intermediate stages. You do not need to repeat the axial
clearance check at every stage.
14. Slide the last Impeller over the Shaft until it rests on the
Stage Spacer. Follow it with the Discharge Shaft Spacer
and the Bearing Journal (Key Nos. 7 and 6) .
DISASSEMBLY – MIXED FLOW
Please refer to the exploded view on Page 14 for Key No.
references.
NOTICE:
Do not use any sharp tools that could damage parts.
Only gentle tapping with a rubber mallet needs to be applied to
release parts.
1. Remove the Cable Guard (Key No. 23) and the Suction and
Coupling Strainers (Key Nos. 24 and 26).
2. Loosen and remove the four M12 bolts and washers (Key
Nos. 18 and 17) and remove the straps.
3. Gently tap the Discharge (Key No. 1) and remove it.
4. Remove the check valve poppet and the top bowl (Key Nos.
2 and 3).
5. Loosen the Rotor Compression Screw (Key No. 4) in the top
of the Shaft (Key No. 27) and remove it.
6. Remove the Rotor Compression Washer, Bearing Journal,
and Discharge Shaft Spacer (Key Nos. 5,6, and 7) from the
Shaft.
7. Tap the remaining Bowls (Key No. 9) with a rubber mallet to
loosen them. Slide the Bowls, Impellers, and Stage Spacers
(Key Nos. 8, 9 and 10) off the Shaft.
8. When you get to the bottom stage, remove the Stainless
Washer, Fiber Washer, Thrust Washer, Distance Sleeve,
Thrust Spacer, Impeller, First Stage Adapter, and Inlet Shaft
Spacer from the Shaft (Key Nos. 12, 13, 14, 11, 15, 8, 20, and 19).
9. Finally, remove the coupling from the Pump Shaft.
2.875"
2.869"
6.0"
1/2 - 20 UNF-2B
4.38" DIA. B.C.
4 Holes
1.00" Dia.
2542 0796 CH
Figure 8: Assembly fixture dimensions for 6” motor;
stickup is motor height