20. Oil shaft extension and slide coupling end bearing end cover (119) with gasket (360) in place, being
careful not to injure grease seal (332). Turn end cover so that the small oil cup is in line horizontally
with center of shaft when the double lock of the bearing housing are in the lowermost position (see
Figure 21: Left hand pump on page 48
and
Figure 22: Right hand pump on page 49
used as a pressure relief for the bearing housing. It must be in the horizontal position to facilitate the
correct filling of the grease chamber. (Note that the location of this relief fitting is shown at the top in
the sectional assembly, Section
, only to show construction details.)
Bolt the bearing end cover securely in place.
On the Model 3406 - Turn end cover so that oil drain notch is at the bottom when the double locks
of the bearing housing are in the lowermost position. This notch permits oil to drain from between
the bearing and the end cover, maintaining proper oil circulation.
On the Model 3416 turn the end cover so that the small oil cup is up when the double locks at the
bearing housing are in the lowermost position.
Be sure gasket (360) is in place. Bolt bearing end cover to bearing housing.
Install oil pipe (190) and constant level oiler (251) on the coupling end only. Be sure the oiler rests
on cap screw, which projects from casing as shown in
21. Assemble the pump half coupling on Group "S" pumps as follows: Put oil or white lead on shaft ex-
tension and in the coupling bore. Insert pump half coupling key in shaft. Place the complete pump
ha! coupling over end of shaft and align key with keyway. Place a solid object, such as a portion of a
2" diameter bar, against the end of the shaft opposite the coupling end and drive coupling half on
shaft with a lead mall.
NOTICE:
If a bearing puller, similar to that shown in Figure 19 on page 46, is available, it can be used on
thrust bearing end to hold shaft when driving on coupling half. When using the puller for this
purpose, draw the puller screw up only finger tight so as not to injure snap ring. Locate the cou-
pling half in the same location on shaft as it was when removed. Never drive the coupling on
shaft with the bearing end cover (109) in place as this may injure the ball bearing.
22. Assemble the pump half coupling on Groups "M" and "L" pumps as follows: Screw a 1/2" stud, ap-
proximately 1¼" longer than the length of the coupling hub, into the end of the shaft. Insert the cou-
pling key in shaft. Put oil or white lead on shaft and in the coupling bore. Place the complete pump
half coupling in position over the stud and align the key and keyway.
Place washers over the stud against the coupling hub and pull coupling on with a nut placed on the
stud. Locate the coupling in the same location on the shaft as it was when removed.
23. Bolt the thrust end bearing end cover (109 or 190A) to the bearing housing. Be sure gasket (360) is
in place. On Model 3405 pumps, be sure grease relief fitting is in a horizontal position as indicated
in
7.5 Reassembly of pump on page 46
Step 20. On Model 3406 pumps, be sure oil drain notch is
at bottom as indicated in
7.5 Reassembly of pump on page 46
Step 20A. Install oil pipe (190) and
constant level oiler (251) on thrust end. Be sure oiler piping rests on cap screw which projects from
casing as shown in
24. Smooth up and clean casing wearing ring, stuffing box bushing and bearing housing seats in upper
and lower half casing. The casing and bearing caps are precision bored so that hand scraping and
fitting of the casing wearing rings, stuffing box bushings or bearing housings are not required.
Inspect parting gasket and if torn or otherwise damaged, cut a new gasket of 1/64" sheet asbestos
(Johns-Manville service sheet #60 or equivalent). The gasket should be removed while assembling
rotating element.
To cut a new gasket, lay the gasket sheet on the upper half casing parting flange, which will serve
as a template. Strike the sheet with a ball peen hammer. This will cut the gasket against the edges
of the casting, and around the parting stud holes. The gasket must cover the entire surface of the
7.5 Reassembly of pump
52
3405-3406-3416 Installation, Operation and Maintenance Instructions
