Inspection And Overhaul; Reassembly Of Power End; S Frame - Goulds Pumps 3935 Installation, Operation And Maintenance Instructions

18. Remove seal seat mount (158) if not already pulled. (228 or 228A).
19. Unbolt and remove seal housing (159) from bearing frame. (228 or 228A).
20. Unbolt and remove thrust bearing end cover (109 or 109A). On J frame thrust bearing,
21. Remove stub shaft assembly from bearing frame.
22. Remove thrust bearing locknut (136). (J frame does not have locknut).
23. Remove ball bearing (112 or 1r2A and 168A) using a suitable puller or press. Care must be
24. Remove wave washer (259) from bearing frame. (J frame does not have wave washer).

Inspection and overhaul

1. O-rings: lnspect and replace if damaged.
2. Shafts: Check shafts for runout to be sure they are not bent. Bearing seats, retaining ring
3. Thrust washer: Inspect and replace if worn. The back thrust washer (546) is nominal
4. Intermediate and discharge head bearings: Check for excessive wear in carbon bushings.
5. Oil seal: Replace if worn or damaged.
6. Diffuser: Rabbet fits should be checked for foreign materials or damage.
7. General: All parts should be clean and free of burrs before assembly. This is especially

Reassembly of power end

Begin reassembly with the bearing frame.
Refer to instructions for the proper reassembly of individual bearing frames. See
(page 18) for identification of bearing frame.
J Frame
1. Install ball bearing (112) on stub shaft (380) using a driving sleeve or bearing press.
2. Lightly oil the bearing housing bore and outer race of the bearing. Install stub shaft
3. Replace retaining ring (361E) in bearing frame with tapered side of ring away from bearing.
4. Replace coupling hub (233) and key.

S Frame

1. Clean the frame (228) and bearing end cover
2. The S frame uses angular contact (duplex) bearings mounted in the face-to-face
3. Thread the bearing locknut (136) on stub shaft (380) and tighten firmly.
4. Place wave washer (529) in the bottom of the bearing frame (228).
Model 3935 Installation, Operation and Maintenance Instructions
the split collet with suitable tool, remove it from the groove in the shaft and slide if off the
shaft.
cover is not used. Remove retaining ring (361E).
taken to prevent damage to bearings. Do not use a hammer to drive shaft through
bearings. Protect bearings from contamination.
grooves, keyways, surfaces under oil seals, and surface under mechanical seal should be
in good condition. Replace if faces are worn, scarred or cracked, or if elastomeric bellows is
damaged.
0.8mm | 0.03" thick, replace if worn to less than 0.5mm | 0.02".
Replace as necessary.
important at O-ring grooves, threads, and bearing areas.
assembly. This is a sliding fit when started properly; do not tap into place.
(109) and install the grease seal (333) with the lip out.
configuration (thin edges of bearing outer race together). Install the bearings (112) on the
stub shaft (380) so the thick outer race of the first bearing goes on first and thick outer race
of the second bearing goes on last. Install the bearings using a driving sleeve or a bearing
press. Drive inner race of bearing only.
Disassembly and reassembly
Sectional view
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