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Viking Pump TSM143: N-P 335/4335 User Manual

Page 11

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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