Adjusting head gasket end clearance, Series md – c80 coupling, Danger – Viking Pump TSM680: 895, 893 and 897 Mag Drive User Manual

Page 14

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SECTION TSM

680

ISSUE

G

PAGE 14 OF 17

Series MD – C80 Coupling

DANGER !

Follow these directions exactly to avoid injury

to yourself or damage to the pumping unit. be

careful to keep the inner and outer magnets at

least (1) foot apart until step 3. Do not engage

magnets in any other fashion.

1. Inspect the magnets for any steel objects attached to

the magnets. Remove any foreign material. Place the

external retaining ring and key on the pump shaft. Slide

the inner magnet assembly onto shaft so it butts against

retaining ring. Install the washer, lock washer and

capscrew to secure the magnet.

See Figure 37. Insert

a brass bar through a port between two rotor teeth and

tighten the capscrew.

FIGURE 37

FIGURE 38

FIGURE 39

FIGURE 40

0.38” CAPSCREWS

(4) REQUIRED

PUMP – BRACKET

0.5” CAPSCREWS

(4) REQUIRED

RETAINING RING

LOCK

WASHER

CANISTER

CANISTER

O-RING

WASHER

CAPSCREW

INNER MAGNET ASSEMBLY

ADJUSTING HEAD GASkET END

CLEARANCE

Use the following procedure to properly adjust the end

clearance when replacing gaskets.

With the balance plate in position, slide the rotor and shaft

into the casing. Insert a feeler gage of the proper thickness

into the port and between the face of the rotor and the face of

the idler

(See Figure 41). Install one 0.015” and one 0.007”

gasket onto the head. With the idler on the idler pin, place

the head into the pump casing. With the capscrews tight,

the feeler gage should fit snugly; otherwise gaskets should

be added or removed until the proper clearance is attained.

Technical Reference TR-807 will provide addtional information

about setting clearances on an internal gear pump. This

reference sheet is available through you authorized Viking

distributor or contact the factory.

2. Inspect the canister o-ring for signs of wear and replace

if necessary. Slide the canister over the inner magnet

and press it over the o-ring until the canister meets the

pump-mounting flange.

3. Support the pump from overhead and secure the

coupling bracket to avoid tipping when the pump is

attached. Using the canister as a guide, slide the

pump and magnet assembly up to the coupling bracket

through the smaller opening. Secure with the four 0.5

capscrews.

See Figure 38.

4. The outer magnet should be installed into the bearing

housing, if not refer to

DISASSEMbLY/ASSEMbLY OF

bEARING HOUSING, page 10. Install the hand knobs so

that 4” of threads are projecting below housing. Support

the bearing housing from over head and gently position

the magnet over the canister so the magnet assemblies

start to engage. Evenly back out the hand knobs.

See

Figure 39. The bearing housing should move toward the

bracket as the hand knobs are removed.

5. Install the (4) 0.38” capscrew. Turn the output shaft

over by hand to make sure the pump rotates freely.

See

Figure 40.

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