Viking Pump TSM680: 895, 893 and 897 Mag Drive - Manual (Page 9)

SECTION TSM 680 ISSUE G PAGE 9 OF 17
Series MD – C80 Coupling
1. If the unit has a spacer coupling then the bracket of the
mag coupling can stay bolted to base. Without the spacer
coupling, either the reducer will need to be removed or
the bracket unbolted. Remove the piping to the pump,
provide a minimum of 4” of clearance beyond end of
coupling shaft. Insert (2) 1/2” hand knobs which have a
minimum of 4.5” of full threads into the two tapped holes
at the 9:00 and 3:00 o-clock positions on the back of the
bearing housing. Remove the (4) 0.38” capscrews.
See Figure 19.
CAUTION !
Do not place your fingers between the pump
mounting flange and the face of the bracket.
Using extreme caution, pull the inner magnet
away from the outer magnet (see figure 21). If
you do not completely pull the pump out it will
snap back and could pinch a finger or hand.
Once the inner magnet is removed from the
bracket be careful setting it down as it will at-
tract any iron or steel object.
2. Turn the hand knobs evenly to back out the bearing
housing and outer assembly. See Figure 20.
CAUTION !
Do not attempt to pull the magnet assemblies
apart by hand until the outer magnet assem-
bly has been backed off 4”. Support the
outer magnet assembly and pull completely
away from the inner magnet. be careful when
setting down this unit to avoid tools and other
metal objects being attracted to the end of the
magnet.
3. Support the pump with a hoist and remove the (4) 0.5”
capscrews. See Figure 21. Pull the pump out of the
bracket; there will be some resistance since the inner
magnet assembly will be attracted to the iron bracket.
If further disassembly of the bearing carrier is required,
refer to page 10. Since there will be some liquid left in
the canister, be aware that the liquid may run out when
the canister is removed from the pump.
4. Insert a brass bar through a port between two rotor teeth
and loosen the capscrew holding the inner magnet to
the shaft. See Figure 22. Slide the washer, lock washer
and inner magnet off the shaft. Do not forget this is a
very strong magnet. If pump disassembly is required,
remove the external retaining ring.
5. Do not remove the o-ring unless it is bad, especially
if PTFE (Derivative) Encapsulated. If a new o-ring is
required, follow instructions in the ASSEMbLY section
on page 11. FIGURE 22
FIGURE 21
FIGURE 20
FIGURE 19
0.38” CAPSCREWS
(4) REQUIRED
HANDKNOBS
(2) REQUIRED
2-790-046-999
PUMP – BRACKET
0.5” CAPSCREWS
(4) REQUIRED
INNER MAGNET
ASSEMBLY
STATIC
O-RING
CAPSCREW
WASHER
LOCK
WASHER
CANISTER RETAINING RING