F-1031, Section 4214
Page 9 of 10
Install Impeller and Intake Adapter
1.
Install the impeller key and impeller on the shaft. Install the impeller
washer and nut. Note that the raised rib on the washer must face the
impeller nut. Tighten the nut finger tight.
2.
Rotate the impeller to assure the seal spring is seated in the spring
holder on the back of the impeller. If the seal spring is not properly
seated, rotating the im- peller will cause it to snap into the spring
holder.
3.
Finish tightening the impeller nut. Tighten until a slot in the nut is lined-
up with the hole in the shaft. Install and secure the cotter pin.
4.
Grease and install the O-ring in the groove on the intake adapter.
5.
Position the intake adapter in its original location on the volute body by
aligning the witness marks made during disassembly. Ensure the
intake adapter holes and volute body tapped holes are aligned.
6.
Tap the intake adapter into position in the volute body bore.
7.
Install the sixteen (16) screws and lockwashers. Tighten the screws until
the flange of the intake adapter contacts the volute body.
8.
Rotate the impeller shaft. There should be no contact between the impeller
and wear ring in the intake adapter.
If there is no contact, tighten the screws evenly from side to side.
Torque to 75 lb-ft.
If there is contact, correct before
proceeding: Check for the following
causes of the contact:
a). Raised burr or nick on either the impeller hub or wear ring.
b). Wear ring was cocked when installed in intake adapter and is
deformed sufficiently to contact the impeller.
c). If a new undersize wear ring was installed, the impeller hub
was not re- worked to the correct size.
Once the contact issue is resolved, tighten the screws evenly
from side to side. Torque to 75 lb-ft.
