6.6.6 Determining impeller spacer thickness (applicable for 3703/3700LF/
3700LFI)
Applicable only to a new spare impeller spacer
With an assembled power end:
1.
Attach the seal chamber cover to the bearing frame.
2.
Install impeller spacer as supplied between shaft and impeller.
3.
Secure impeller to shaft with impeller cap screw or nut.
4.
Place indicator on the coupling end of the shaft and zero it out (magnetic base attached to bearing
frame).
5.
Remove (or loosen to provide 3/8” travel) the thrust bearing end cover screws.
6.
Install back pull-out assembly into the case and tighten down 3 or 4 nuts (equally spaced around
the case).
7.
Record the travel measured by the indicator.
8.
Add .015" (3703) or .030" (3700LF/3700LFI) to the amount of travel measured and then machine
this off the face of the impeller spacer.
6.6.7 Install the impeller (3700/3710)
CAUTION:
Risk of physical injury from sharp edges. Wear heavy work gloves when handling impellers.
It is recommended that you repeat the runout checks on the seal-chamber cover face, lock, and wear-
ring surfaces as described in
6.6.4 Install the seal-chamber cover on page 103
.
1.
Install the impeller key in the keyway of the shaft.
The key should be at the top (12 o’clock) position for the impeller installation.
2.
Install the impeller on the shaft.
Apply anti-galling compound to the impeller bore to aid in assembly and disassembly.
3.
Install the impeller nut and tighten to the torque values shown in the Maximum torque values for
3700 fasteners table.
The impeller nut has left-hand threads.
4.
Tighten the set screw in the end of the impeller nut.
5.
Verify that the shaft turns freely.
If you notice any rubbing or excessive drag, then determine the cause and correct it.
It is recommended that you repeat the runout checks on the impeller wear-ring surface as described in
Replace the wear rings.
6.6.8 Install the impeller (3703)
CAUTION:
Risk of physical injury from sharp edges. Wear heavy work gloves when handling impellers.
It is recommended that you repeat the runout checks on the seal-chamber cover face and lock surfaces
as described in
6.6.4 Install the seal-chamber cover on page 103
.
1.
Install the impeller spacer on the shaft.
2.
Install the impeller key in the keyway of the shaft.
The key should be at the top (12 o’clock) position for the impeller installation.
3.
Install the impeller on the shaft.
Apply anti-galling compound to the impeller bore to aid in assembly and disassembly.
6.6 Reassembly
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
109
Summary of Contents for Goulds Pumps 3700
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