6.5.4 Replace the wear parts
6.5.4.1 Replace the case wear rings and throat bushings
100
320
320
184
125
164
164
125
Figure 64: Wear rings and bushing replacement
The wear rings and bushings (164, 125) are held in place by a press fit and three tack welds or three
setscrews.
1.
Remove the wear ring / bushing:
a) Grind out the tack weld or if applicable remove setscrews.
b) Press the wear ring / bushing out of the mating components bore.
2.
Install the wear ring / bushing:
a) Thoroughly clean the bushing fit in the mating components bore.
b) Chill the new wear ring / bushing using dry ice or other suitable chilling substance, and install
the wear ring / bushing into the fit of the mating component.
Be prepared to tap the wear ring / bushing in place with a hardwood block or soft-faced hammer.
WARNING:
Dry ice and other chilling substances can cause physical injury. Contact the supplier for infor-
mation and advice for proper handling precautions and procedures.
c)
Tack weld the wear ring / bushing in place at three equidistant places.
d) If using setscrews to secure the wear rings / bushings, locate, drill, and tap three new setscrew
holes equally spaced between the original holes in each new wear ring / bushing and wear
ring / bushing seat area. Install setscrews and upset threads.
3.
Confirm the bore diameter of the wear rings / bushings after installation.
4.
Check the wear-ring (164) runout and distortion by measuring the bore at each tack weld / setscrew
location with inside micrometers or vernier calipers. Machine any distortion in excess of 0.08 mm |
0.003 in. prior to trimming the new impeller wear ring (142), if supplied.
CAUTION:
Excessive machining can damage ring fits and render parts unusable.
6.5 Preassembly inspections
88
3620 i-FRAME API type BB2 single stage / ISO 13709 2nd Ed/API 11th Ed Installation, Operation, and Maintenance
Manual
Содержание GOULDS PUMPS i-FRAME 3620
Страница 2: ......