1
2
3
+0.005 in.
(+0.127 mm)
0.000 in.
(0.000 mm)
–0.005 in.
(–0.127 mm)
4 5
6
7
8
5.
Draw a straight line from point 1 to point 8.
This is the seal chamber centerline.
6.
Draw a trend line through points 2 through 7 and investigate any deviations greater than 0.051 mm |
0.002 in.
This is the casing ring centerline.
7.
Adjust the nominal 0.127 mm | 0.005 in. thickness of the center case shim by the difference be-
tween the seal chamber centerline and the ring bore centerline at points 4 and 5.
•
If the seal chamber centerline is above the ring bore centerline, then increase the shim
thickness.
•
If the seal chamber centerline is below the ring bore centerline, then decrease the shim
thickness.
8.
Check and confirm that the separation between the seal chamber center and the rotor center is
0.127 mm | 0.005 in. or less.
If the separation is greater than 0.127 mm | 0.005 in., then contact your ITT representative for assis-
tance.
6.6.3.2 Align the rotor
Before you align the rotor, you must qualify the casing bores. See Qualify the casing bores.
The purpose of this procedure is to align the center of the bearing housing bores with the center of the
casing bore. This ensures that the rotor is straight through all the bores during operation.
1.
Temporarily place two one-inch square shims in the bottom of each center case bushing bore. The
thickness of the shim must be determined during the casing bore qualification procedure. These
shims remove the sag, or bend, from the rotor by compensating for the misalignment between the
center bushing clearance and the casing bore.
2.
Place the rotor in the lower half of the casing. Make sure that the dowel in the center case bushing
is at the 12 o'clock position.
3.
Mount the tool bearings on the shaft.
Tool bearings are used for rotor alignment purposes only. The bore diameter of the inner race has
been increased so that it is a slip fit onto the shaft.
4.
Mount the bearing housings. Hand-tighten the mounting nuts to allow for adjustment.
5.
Install two dial indicators on the shaft, one in each seal chamber bore.
6.
Set each indicator to zero on the same side of the casing. Adjust the bearing housings vertically
and horizontally to achieve a TIR less than 0.0381 mm | 0.0015 in.
Make sure that the indicator is reading on a machined surface and not on a hand-filed surface,
which is sometimes necessary near the parting flange.
7.
Keep the bearing housing level from side to side during the bearing housing adjustment in order to
ensure the correct oil level setting.
8.
Double-check the centering of the rotor with a feeler gauge between the casing rings and impeller
rings and confirm the clearance around the circumference.
6.6 Reassembly
104 Model 3600 i-FRAME API610 11th Edition / ISO 13709 2nd Edition to current API BB3 Multi-Stage, Axially Split Installa-
tion, Operation, and Maintenance Manual
Summary of Contents for GOULDS PUMPS 3600 i-FRAME
Page 2: ......
