The impeller nut has left-hand threads.
b) Remove the impeller, impeller key, and seal-chamber cover as described in the Disassembly
section.
2.
Lubricate all O-rings with suitable lubricant, unless the seal manufacturer’s instructions indicate oth-
erwise.
3.
Slide the cartridge seal assembly (rotary, stationary gland, gland gasket, and sleeve) onto the shaft.
NOTICE:
Ensure that the mechanical-seal gland-piping connections are properly oriented.
370H
228
122
355
360Q
184
122 Shaft
184 Seal-chamber cover
228 Bearing frame
355 Gland stud nut
370H Bearing-frame bolts
Figure 79: Cartridge-type mechanical seal and seal-chamber cover
4.
Install the seal-chamber cover.
a) Set up a sling to the eyebolt and to the overhead lifting device.
b) Lift the seal-chamber cover and position it so that it aligns with the shaft.
c)
Install the seal-chamber cover on the power end by guiding the cover carefully over the car-
tridge-seal rotary.
Ensure that the gland studs smoothly enter the holes in the cartridge-seal gland and that the cover
fits into the bearing frame lock.
d) Install the seal-chamber cover and bearing-frame bolts and tighten them using an alternating
pattern.
Torque the bolts to the values shown in the Maximum torque values for 3700 fasteners table.
e) Install the gland stud nuts and tighten evenly to the torque values shown in the Maximum tor-
que values for 3700 fasteners table.
5.
Tighten the setscrews in the locking collar.
6.
Disengage the spacer ring or clips.
7.
Verify that the shaft turns freely.
If you detect rubbing or excessive drag, then determine the cause and correct it.
6.6 Reassembly
108 Model 3700, 3703, 3710, 3700LF, 3700LFI API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Instal-
lation, Operation, and Maintenance Manual
Summary of Contents for Goulds Pumps 3700
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