Page 394 - Improving Machinery Reliability

358 Improving Machinery Reliability

0 Air pressure-gauge outside cabinet approximately 30 psig Initial
higher than air inside cabinet.
Air temperature 130°F- 155°F
8. Hot-pititip piping strniri check (300°F errid nborc)
a. Placed and adjusted a dial indicator on the side of the pump's cou-
pling hub andlor flange and observed the dial indicator while the
pump was being heated as closely as possible to its operating tem-
perature.
Noie: While making this check, do not tie down bearing bracket
support on overhung-type pumps.
0 Movement was more than .OIO"TIR. Made correction to piping
supports.
0 Movement was less than .010"TIR. Piping satisfactory.
9. Aligntnerit Of f/ril'O. 10 /Jllltt/l
a. Reviewed thermal growth calculation and verified pump and driver
were offset accordingly.
b. Connected coupling sweep (with less than ,003" total sag) 10 pump.
Installed and adjusted dial indicators to the OD and face of the
driver's coupling and recorded the coupling's misalignment and
calculated shim adjustnients using two-indicator alignment method.
Now: Do not stack shims: never use more than three shims.
c. Final alignnient after shim correction.
0 0

I
.MI "inax.
10. Corrplirrg rrrtd cotcplittg gircrrd
a. Checked niotor rotation (before coupling).
b. Adjusted flexible disc coupling so that sleeve-bearing motor driver
will run in its magnetic center. and tightened set screws to lock it in
place.
c. Greased gear-type coupling and limited its end float to prevent
bearing and shaft shoulder contact on sleeve-bearing-type motor
d. Installed coupling guard.

~ ~ ~~~
STOP Do Not Proceed Unless All of the Above Items Have Been Fully Verified and
HERE Properly Initialled.

(checklist continued on next page)