Thrust bearing adjustment, Installation of carbon graphite bushings, Danger – Viking Pump TSM164: GG-AL 4197 User Manual

Page 8

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SECTION TSM 164

ISSUE

F

PAGE 8 OF 10

fIgURE 13

Loosen the two screws in the face of the thrust bearing

assembly.
If the shaft cannot be rotated freely, turn the thrust bearing

assembly counterclockwise until the shaft can be turned

easily.
To set end clearance:
1. While turning the rotor shaft, rotate the thrust bearing

assembly clockwise until a noticeable drag occurs. This

is zero end clearance.

2. Mark the position of the bearing housing with respect to

the casing.

3. Rotate the thrust bearing assembly counterclockwise the

distance listed below as measured on outside of bearing

housing.

4. After the adjustment is made, tighten the two setscrews

in the face of the bearing housing assembly to secure

the position.

For viscosities above 2500 SSU, add additional end

clearance (0.004” for GG, HJ and HL size pumps and

0.005” for AS, AK and AL size pumps).

THRUST BEARINg ADJUSTMENT

See

figures 7 and 8, page 6.

PUMP

SIZE

DISTANCE IN INCHES

ON O.D. Of BEARINg

HOUSINg

END

CLEARANCE

GG

0.69” (11/16”)

.005

HJ , HL

0.94” (15/16”)

.005

AS , AK , AL

1.25” (1-1/4”)

.008

4. Tighten

the head capscrews evenly.

5. If

the pump was equipped with a relief valve and was

removed during disassembly, install on the head with

new gaskets. Relief valve adjusting screw cap must

always point towards the suction port. Refer to

figure

3, page 3. For relief valve repair or adjustments, see

“Pressure Relief Valve Instructions,” page 9.

In 2005, the use of single seal bearings were phased out.

Pumps now use “Sealed for Life” bearings that have seals on

both sides. The new bearings can be installed either side first

and do not need to be packed with grease.
6. Install the single row ball bearing in the casing. (For

older models using single seal bearings, pack the ball

bearing with multi-purpose grease, NLGI #2, and install

in the casing with the sealed end towards the head end

of the pump.) Install the inner snap ring in GG, HJ and

HL size pumps. See

figure 7, page 6.

NOTE: AS, AK and AL size pumps do not have a snap

ring; a bearing retainer washer must be assembled over

the end of the shaft before the bearing is assembled.

See

figure 8, page 6.

7. Place

the bearing spacer over the shaft and against the

single row ball bearing in the casing (AS, AK and AL size

pumps). See

figure 8, page 6.

8. Install

the shaft snap ring in the groove in the shaft (GG,

HJ and HL size pumps). See

figure 7, page 6.

9. For models using single seal bearings, pack the

lubrication chamber between the inner ball bearing and

the double row ball bearing in the thrust bearing assembly

approximately half full with multi-purpose grease, NLGI

#2. See

figures 7 and 8, page 6.

10. Pack the double row ball bearing with multi-purpose

grease, NLGI #2 and press into the bearing housing with

shield side toward the coupling end of the shaft. See

figure 7, page 6. (AS, AK and AL size pumps do not

use a shielded bearing). Install the snap ring to hold the

bearing in place on GG, HJ and HL size pumps.
NOTE: On AS, AK and AL size pumps, install the lip seal

in the bearing housing end of the cap. The lip should

face towards the end of the shaft. Put the bearing spacer

sleeve in the lip seal and install in the bearing housing

and tighten the setscrews securely. See

figure 8, page 6.

11. Insert a piece of brass or hard wood through the port

opening between the rotor teeth to keep the shaft from

turning.

12. Start the thrust bearing assembly into the casing. Turn

by hand until tight. This forces the rotor against the head.

Replace and tighten the locknut on the shaft.

13. Remove brass piece or hardwood from port opening
14. Adjust the pump end clearance, refer to “Thrust Bearing

Adjustment” below.

DANgER !

Before starting pump, be sure all drive

equipment guards are in place.
failure to properly mount guards may

result in serious injury or death.

When installing the carbon graphite bushings, extreme care

must be taken to prevent breaking. Carbon graphite is a brittle

material and is easily cracked. If cracked, the bushing will

quickly disintegrate. Using a lubricant and adding a chamfer

on the bushing and the mating part will help in installation.

The additional precautions listed below must be followed for

proper installation:

INSTALLATION Of CARBON

gRAPHITE BUSHINgS

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