Viking Pump TSM635.1: H-HL Universal Mag Drive User Manual

Page 8

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SECTION TSM

635.1

ISSUE

E

PAGE 8 OF 12

FIGURE 12

SETTING THRUST WASHER CLEARANCE

8. Tighten the setscrew in the locknut. Check the feeler

gauges. If the gauges are too tight, loosen the setscrew

and locknut slightly and repeat tightening procedure.

Remove the feeler gauges. Check to make sure the pump

rotates freely by turning the inner magnet assembly.

9. Inspect the magnet to make sure it has not picked up

any foreign particles, which could damage the pump.

Inspect the canister bushing; replace if needed. See

“Installation of Bushings” on page 7. Lubricate the

ID of the canister bushing. Inspect the canister o-ring;

replace if needed. Refer to Step 1 if PTFE (derivative)

encapsulated. Lubricate and place the o-ring into the

groove in the adaptor plate. Align the roll pin in the

adaptor plate with the corresponding hole in the canister

and place the canister onto the shaft. Secure the canister

using eight capscrews.

10. If the old shims are not reusable or if any parts have

been replaced, operating clearances will need to be re-

established. Refer to

“Adjusting End Clearance” on

page 9. Otherwise, place the head shims on the head.

The proper amount of shims should be used to provide

the correct end clearance (0.004” for sizes H-HL).

Inspect the head o-ring; replace if needed. Refer to

Step 1 if PTFE (derivative) encapsulated. Lubricate the

O-ring and place on the head.

11. Coat the ID of the idler bushing with a suitable lubricant

and place the idler on the idler pin in the head.

12. Align the hole in the head, at the base of the idler pin, with

the casing port opposite the groove in the adaptor plate.

Hole will be slightly offset to CCW side of the port.

13. The head can now be assembled onto the pump. Tilt

the top of the pump head away from the pump slightly

until the crescent enters the inside diameter of the

rotor and rotate the idler until its teeth mesh with the

rotor teeth. Secure the head to the casing using six

to eight capscrews. Check the end clearance. Refer

to

“Adjusting End Clearance” on page 9, if needed.

Rotate the shaft by hand to make sure it turns freely.
The pump head and casing should have been marked

before disassembly to insure proper reassembly. If not,

be sure the idler pin, which is offset in the pump head, is

placed between the port connections to allow for proper

flow of liquid through the pump.

14. Inspect the bracket bearings and lipseals; replace

if needed. Refer to

“Disassembly / Assembly of

Bracket Bearings”, page 6. Inspect the outer magnet

for any steel objects, which may be attached. Remove

any foreign material. Secure the bracket to a base or

other stable platform. Rotate the outer magnet shaft by

hand to make sure there is no interference. If rubbing

occurs, visually inspect for debris. Consult the factory if

rubbing between the outer magnet and bracket persists.

15. Insert two fully threaded 5/16” X 4” socket head

capscrews into the bracket until they are fully extended

in front of the bracket to control assembling the pump,

see

Figure 13 on page 9. To keep the pump and bracket

assemblies properly aligned and for additional safety, it

is recommended to use 2 lengths of all-thread rod (6-8”)

threaded into diagonal capscrew locations in the bracket

and slide through the corresponding holes in the adaptor

plate.

THRUST WASHER

FEELER

GAUGES

3. Apply lubricant to the ID of the adaptor plate bushing.

Clean the rotor and shaft so it is free of dirt, grit and other

debris. Remove burrs around the keyway and shoulder

of the shaft.

4. Place one thrust washer onto the shaft so that the blind

hole in the thrust washer will line up with the drive pin

on the back of the rotor. Slide the shaft into the adaptor

plate bushing as far as it will go. Make sure that the

thrust washer remains seated on the drive pin and flat

against the rotor.

5. Slide the second thrust washer onto the shaft, drive hole

facing out. Then install the key into the shaft.

6. Clean the face on the inner magnet that faces the casing.

Slide the inner magnet onto the shaft and engage the pin

of the magnet into the hole of the thrust washer. Install

the split locknut with the raised face out, do not tighten

completely.

7. Place two feeler gauges (0.001”), one on each side,

between the adaptor plate bushing and the inner magnet

thrust washer. Refer to

Figure 12. This will establish

the proper clearance for the thrust washers. Tighten the

locknut until the feeler gauges are snug, but can still be

removed. Do not remove the feeler gauges at this time.

FIGURE 11

ADAPToR PLATE / CASING PoSITIoNING HL SIZE

SHoWN

VIEWED FRoM HEAD END

ADAPToR

PLATE GRooVE

CASING

PoRTS

CASING

PoRTS

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