Viking Pump TSM685.1: GS-HL 855 - Manual (Page 9)

SECTION TSM 685.1 ISSUE G PAGE 9 OF 16
INSTALLATION Of BUSHINGS
CARBON GRAPHITE
The canister bushing requires a special fixture for proper
assembly. It is only sold as an assembly with the canister.
If attempting to install the carbon graphite idler or casing
bushing, extreme care must be taken to prevent breaking.
Carbon graphite is a brittle material and easily cracked.
If cracked, the bushing will quickly disintegrate. Using a
lubricant on the bushing and mating part will help facilitate
installation.
Figure 16 shows the proper position of the casing bushing
after installation. This will require a special fixture for proper
position. Improper location may result in a pump with
excessive slip or requiring a large number of shims. The
additional precautions listed below must be followed for
installation:
1. An arbor press must be used for installation.
2. Be certain the bushing is started straight.
3. Do not stop the pressing operation until the bushing is in
the proper position; starting and stopping will result in a
cracked bushing.
4. After installation, check the bushing for cracks.
DISASSEMBLY / ASSEMBLY Of
BEARING CARRIER HOUSING
DISASSEMBLY
The bearing carrier housing features two sealed ball bearings
along with an outer magnet assembly. If further disassembly
of this unit is required, proceed as follows:
1. Remove the internal retaining ring. Then press the shaft
out of the housing.
2. Remove the external retaining rings from shaft, place
unit into press and push out shaft out of the bearings.
ASSEMBLY
1. Place some Loctite on the O.D. of the first bearing and
press into the housing bore. Position the bearing spacer
in the bore and insert the second bearing. Center the
bearing spacer then press in shaft with one external
retaining ring on shaft. Press down until ring contacts
bearing race then install second ring Install internal
retaining ring into bearing housing.
2. Slide outer magnet assembly onto pump shaft. Locate
the outer magnet per dimension “A” then tighten the two
setscrews.
Coupling Series “A” Dim.
A Series 165 mm
B Series 198 mm
fIGURE 15
OUTER MAGNET, BOLT ON HUB
AND BEARING HOUSING
Bearing
Housing
Ball Bearings
External
Retaining Rings
Spacer
Internal
Retaining Ring
Set Screw
Outer Magnet
fIGURE 16
CASING BUSHING POSITIONING
ASSEMBLY Of PUMP
Use a suitable lubricant compatible with the fluid being
handled when reassembling the pump.
Inspect all parts, especially drilled holes in the casing (for
draining) to make sure they are not plugged. Replace any
worn parts, remove any burrs, and clean all parts before
assembling the pump.
1. If the canister O-ring needs to be replaced, apply a
lubricant to the O-ring and place it into the O-ring groove.
If the O-ring is PTFE (derivative) encapsulated, follow
these special instructions.