ITT 3610 i-FRAME Manual page 97

Figure 71: Mount the cartridge mechanical seal on the thrust end
6.6.2.1 Confirm the seal chamber runout
The bearing housings are doweled to the casing (100) during the original build. However, in order to as-
sure the correct running position of the shaft, use this procedure in order to confirm the seal chamber
runout before you install the cartridge mechanical seals:
1. Install the old bearings on the shaft and bolt the bearing housings to the casing.
2. Mount the dial indicator on the shaft (122). Rotate the shaft (122) so that the indicator rides along
the seal chamber bore for 360°.
3. If the total indicator reading exceeds 0.127 mm | 0.005 in., determine the cause and make correc-
tions.
It may be necessary to readjust the housing.
a) Remove the dowel pins and use the adjusting screws to bring the runout to within 0.0508 mm |
0.002 in.
b) Redowel the housings in a different location.
4. Check the seal-chamber face runout.
a) With a dial indicator mounted on the shaft, rotate the shaft so that the indicator rides along the
seal-chamber face for 360°.
b) If the total indicator reading exceeds the allowable runout as this table shows, determine the
cause and make corrections.
Pump Size Group
13D/15D
22G
33H
43N
53Q/55Q
59Q
5. Remove the dowel pins and unbolt the bearing housings. Discard the old bearings.
3610 i-FRAME API 610 11th Ed/ISO 13709 2nd Ed, API Type BB1 Single-Stage, Axially-Split, Between-Bearing IOM
383
100
122
353
Radial bearing
6309
6312
6313
6318
6320
6224
355
Thrust bearing Maximum Allowable Total Indicated Run-
out
mm | inch
7309/BECBM 0.0508 | 0.0020
7312/BECBM 0.0635 | 0.0025
7313/BECBM 0.0762 | 0.0030
7318/BECBM 0.0889 | 0.0035
7320/BECBM 0.0889 | 0.0035
7320/BECBM 0.0889 | 0.0035
6.6 Reassembly
95