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EBARA End Suction Centrifugal
Operating, Installation, and Maintenance
3U / 3UB Assembly Instructions
Position the pump on its end with the shaft up. The work surface should be level, capable of supporting the motor.
Make certain the motor is not connected to a power source. Do not install or assemble the pump on a motor
connected to a power source. Serious injury could occur if the motor activates during pump assembly.
Assembling the Pump – Models 3HP - 15HP (see page 7 for sectional view)
1. Position a Nylon gasket (117-3) over the motor shaft.
2. Carefully press the rotating seal assembly onto the shaft sleeve (041). The smooth face of the
rotating ring must make good contact with the seal seat and the seal retainer must seal against the shaft sleeve.
Note: Seal faces should be wiped clean with non-oil based solvent or alcohol.
3. Using finger pressure only, insert the seal seat into the casing cover (011). Press the seal until it evenly
bottoms out in the seal cavity.
4. Position the cast iron motor bracket (018) over the shaft. Fasten the bracket to the motor, tightening bolts
using a cross-tightening pattern. (Tighten the bolts to the factory recommended torque specifications of 8 ft. lbs.)
Overtightening may cause stripping of threads.
5. Carefully position the casing cover (011) and seal over the shaft. Be careful not to damage the stationary
seal seat.
6. Slide the stainless steel shaft sleeve, with rotating assembly, over the motor shaft.
7. Position the O-ring (115) around the casing cover (011). Do not cut, nick, or damage the O-ring during the
installation.
8. Install the impeller shaft key (
9. Place the seal spring assembly over the rotating piece of the seal in position to receive the impeller.
10. Place a Nylon gasket (117-2) on top of spring retainer.
11. Firmly press the impeller (021) into position by aligning the slot over the shaft key. Press the impeller down
the shaft until it bottoms and seats squarely against the Teflon gasket (117-2) and shaft sleeve (041).
12. Place a Nylon gasket (117-1) over the impeller hub and into the impeller eye. Install the impeller bolt (125) to
secure the impeller to the shaft. Do not overtighten the shaft bolt. (Use a thread compound or cement to
secure the shaft bolt and prevent it from working loose.)
13. Tighten the impeller bolt. (Tighten the bolts to the factory recommended torque specifications of 11 ft. lbs.)
14. Install the pump volute (001) over the seal plate. Rotate the volute to align with the bolt holes and secure it
with the bolts, washers, and nuts. Cross-tighten the bolts to the factory recommended torque specifications
(8 ft. lbs.).
15. With a socket wrench, rotate impeller to check for alignment. If rubbing against casing, loosen bolts on
casing and retighten.
EBARA Fluid Handling
www.pumpsebara.com
(t) 803 327-5005 • (f) 803 327-5097
WARNING
3
/
" x
3
/
" x 1
3
/
").
16
16
16
3U / 3UB
11
rev. 02/09
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