Flowserve IJ, Installation Operation & Maintenance

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
6-11 BO2660-01
8. Evenly tighten puller screws, pulling head (85) away from case (37) and bringing it to rest
securely on carriage dowels.
NOTE
On some pumps, the discharge diffuser is welded to the
discharge spacer as a single assembly. If this is the case, the
discharge diffuser will not be removed with the head, but
will be removed with the internal assembly.
9. Turn carriage end-for-end for use in removing internal assembly, or if desired, lift head (85)
with pressure reducing bushing (65) and discharge diffuser (280) (if applicable) attached free
of carriage and transport the group to the shop area or set it aside.
6.4.5.2 Removing Head Without Using Carriage
To remove the head from the case when no assembly carriage is available, proceed as follows:
1. Perform steps 1 through 5 under REMOVING HEAD USING CARRIAGE above.
2. Install lifting-eye in tapped hole on top of head and complete preparations for lifting head,
then work head off studs.
3. Transport head (85) with pressure reducing bushing (65) and diffuser (280) (if applicable)
attached to shop area or set it aside.
6.4.5.3 Disassembly
To disassemble the head, proceed as follows:
1. Remove:
a. discharge diffuser (280) (if applicable),
b. inner head expansion gaskets (243) and inner head gasket spacers (169), and
c. head gasket (22)
2. When removing pressure reducing bushing (65), note method used by factory for retaining
bushing to head (85), if any; then use rotary file and grind off tack welds or stake marks,
whichever is applicable, and remove capscrews (if installed). Use jack screws in holes
provided and remove bushing from head.
CAUTION
Failure to ensure that the inner head gasket spacers that were
supplied with the pump, or precise replicas, are used in
reassembly could result in improper makeup of intermediate
covers, the suction spacer, and the discharge diffuser-spacer,
causing recirculation, erosion, and decreased efficiency.
3. As a precaution against loss of an inner head gasket spacer, measure thickness of each spacer
with a micrometer and record measurements.