Viking Pump TSM685.1: GS-HL 855 - Manual (Page 7)

SECTION TSM 685.1 ISSUE G PAGE 7 OF 16
PUMP DISASSEMBLY (Cont.)
7. With the inner magnet removed, now remove the pump
shaft key. Remove the outer thrust washer. The rotor
and shaft may now be removed by tapping on the end of
the shaft with a soft face hammer (If a soft face hammer
is not available a regular hammer may be used with a
piece of hardwood).
8. Remove the inner thrust washer from behind the rotor.
The casing should be examined for wear, particularly in the
area between ports. Clean all other parts thoroughly and
examine for wear or damage. Check bushings, idler pin and
thrust washers; replace if necessary.
When making major repairs, such as replacing a rotor and
shaft, it is advisable to also install a new head and idler pin,
idler and bushing, and casing bushings. See INSTALLATION
Of BUSHINGS, page 9.
DISASSEMBLY Of COUPLING
Series MD2 - A4 / A9 Coupling
1. Remove piping to the ports and remove the (4) 12mm
capscrews-securing the pump to the bracket. See
Figure 8. Support the pump with an overhead hoist if
possible.
CAUTION !
Do not place fingers onto front of pump mount-
ing flange or face of bracket. Using extreme
caution, pull inner magnet away from outer
magnet. See figure 8. 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 attract any steel object.
2. The canister will contain some liquid, therefore use care
while removing from the pump and pull straight off.
3. Remove the (2) 4mm buttonhead machine screws and
the set collar. Insert brass bar into rotor teeth through port
and remove locknut. Slide off inner magnet assembly
(See Figures 9 & 10). Do not forget this is a very strong
magnet. If further pump disassembly is required, refer
to step 6 of PUMP DISASSEMBLY, page 6.
4. Do not remove the O-ring unless it is bad, especially
PTFE (derivative) encapsulated. If a new O-ring is
required, follow instructions in the ASSEMBLY section
on page 9.
5. You should be able to visually inspect the outer
magnets from the end of the bracket. If removal is
necessary, start by removing the (4) capscrews (See
Figure 8). Separate the bracket from the motor or
bearing carrier. Loosen the setscrew on the outer shell
hub. Pull the outer magnet assembly off the shaft.
If the unit features a bearing carrier, the bearings
should not require maintenance since they are sealed.
For additional information on bearing carrier repair
Refer to ASSEMBLY/DISASSEMBLY Of BEARING
HOUSING, Page 9.
fIGURE 8
PUMP AND BRACKET SEPARATION SEQUENCE
fIGURE 9
PUMP, INNER MAGNET AND CANISTER ASSEMBLY
Canister
Bushing
Canister O-ring
Button Head
Screws
Canister and Casing
Drain Holes
fIGURE 10
INNER MAGNET AND LOCKNUT ASSEMBLY
(4) Capscrews secure motor to bracket 4) 12mm capscrews secure
the pump.
Buttonhead
Screws
Locknut Inner Magnet
Rotor Shaft
Set Collar
DO NOT PLACE
FINGERS HERE