Viking Pump TSM143: N-P 335/4335 - Manual (Page 11)

SECTION TSM 143 ISSUE E PAGE 11 OF 15
10. Install the set collar on the shaft in the rotor bearing
sleeve directly under the tapped access hole. The center
line of the collar set screws (5/16” socket head) must
line up with the center line of the access hole. Rotate the
shaft and tighten all setscrews.
Replace the pipe plug in seal access hole.
11. Slide the seal spring on the shaft and into the seal
chamber against the set collar. Place the spring adapter,
with the open side facing the end of shaft against the
spring. Place the tapered installation sleeve on shaft.
NOTE: The tapered installation sleeve is available from
factory, at additional cost, for the N & R size pumps.
12. Apply a generous amount of non-detergent SAE 30
weight oil to the large diameter of the shaft, tapered
installation sleeve and the inner diameter of the
mechanical seal rubber parts.
13. Coat the seal holder chamber and the o-ring seat gasket
with non-detergent SAE 30 weight oil and press in the
seal seat with lapped faced out. Protect the face of the
seal seat with a clean piece of cardboard while pressing
into place.
14. Coat the seal holder plate o-ring gasket with non-
detergent SAE 30 weight oil and install over the pilot of
plate.
15. Coat the inside diameter of the rotating face of seal
with non-detergent SAE 30 weight oil and start the tail
of bellows over installation sleeve on shaft. A twisting
motion while pushing will aid in sliding the seal on the
sleeve. Push the seal against seal adapter. Do not touch
the carbon rotating face with anything except clean
hands or a clean cloth.
Check to make sure the adapter is not cocked.
16. Install the seal holder plate over the shaft on mounting
studs until the seal faces touch.
Start the nuts on the mounting studs. Pull the seal
holder plate evenly against the face of the seal chamber
with the nuts, alternately tightening one and then the
other. This will compress the mechanical seal to correct
operating length and compress the plate gasket to seal
off the seal chamber.
17. Remove the tapered installation sleeve.
18. Place the inner end cap with lipseal (lip facing end of
shaft) on shaft.
19. Install the thrust bearing housing on end of the rotor
bearing sleeve and tighten the nuts and capscrews
securely.
It is not necessary to use a gasket between these parts.
20. Insert both tapered roller bearings in the thrust bearing
housing, large end of the inner races together.
CAUTION: It is possible to install bearings incorrectly.
For proper assembly, refer to Figure 17.
21. Install the bearing spacer collar on the shaft next to the
inner race of the roller bearing.
dope) and quickly install the gasket and rotor bearing
on the casing. Place a support under the rotor bearing
sleeve to prevent the casing and rotor bearing sleeve
from tilting down while the rotor is being installed.
3. Check the casing to be sure the drain plug has been
removed.
4. Coat the inner diameter of the rotor bearing sleeve
bushing with a thin coat of non-detergent SAE 30 weight
oil.
Support the weight of the rotor with a hoist. A cable sling
can be used around the shaft, or around the rotor teeth,
to carry the weight of part while being assembled into
the casing.
Place the end of rotor shaft through casing into bushing.
Do not allow any portion of the shaft to strike the
bushing. A carbon graphite bushing can be severely
damaged if struck. Slowly turn the rotor from right to left
while pushing into the casing. Push the rotor as far into
casing as it will go.
5. Prior to installing the head, coat the casing face with
thread sealant (pipe dope) and place a new .015 inch
head gasket on the mounting studs. Coat the dry side of
the gasket with thread sealant (pipe dope) and prepare
to mount the head and idler assembly.
6. The pump head and casing were marked before
disassembly to ensure proper reassembly. If not, be
sure the idler pin, which is off set in the pump head, is
positioned toward and equal distance between the port
connections to allow for an even flow of liquid through
the pump.
Place the head on pump, slightly tilting top of the head
back away from casing until the crescent enters inside
diameter of the rotor. Rotate the idler on idler pin until
the idler teeth mesh with the rotor teeth. Raise the head
until the face of head is parallel with the face of casing
and then work into position. Care must be taken to avoid
damaging the head gasket. Fasten the head to casing
with head nuts and tighten evenly.
If the relief valve was removed from the head, install on
head with the adjusting screw cap pointed toward suction
port. Refer to figure 15 . For PRESSURE RElIEf VAlVE
INSTRUCTIONS, refer to page 13.
fIGURE 15
7. Push the rotor back against the head.
Install the drain plug in the casing.
9. Wipe the shaft clean in seal area and thoroughly coat
with non-detergent SAE 30 weight oil.
Before installing the parts contained in the mechanical
seal, refer to Figure 14 to become familiar with part
name and location in rotor bearing sleeve.
INLET
OR
SUCTION
OUTLET
OR
DISCHARGE
RELIEF VALVE
ADJUSTING
SCREW CAP