Viking 855 service manual Installation Of Bushings, Assembly Of Pump, Carbon Graphite

Bearing Carrier for MD2-C Couplings (Cont.)

ASSEMBLY

Depending on the condition of the bearings, either replace or repack existing bearings by cleaning and packing with multi- purpose NLGI # 2 grease. Replace the lip seals if necessary. See Figure 14, page 9 for lipseal orientation.

1.Place the bearing housing milled-face down with cast surface up. If the inner lip seal was removed, install with the cup up. Install the cup of inner bearing into housing (cup up).

2.Slide the inner tapered roller bearing cone onto the shaft (cone down) and then the inner spacer followed by the outer cone (cone up).

3.Guide shaft into the housing and into the inner lip seal. Slide the tapered roller bearing outer cup into the housing (cup down) and the bearing spacer collar onto shaft.

4.Thread in the end cap until it meets the outer cup. Install the lockwasher and locknut. Secure the end of the shaft in a vice with padded jaws then tighten the locknut. Tighten the end cap until there is considerable drag on the bearings, then back off the end cap approximately 10°. Secure the end cap into position by tightening the two set screws.

5.Tighten the locknut again, then bend over the appropriate lockwasher tab.

6.Install the inboard drive key, then slide the magnet onto the shaft. Locate the outer magnet per dimension “A” listed below. Tighten the two setscrews to lock into proper position.

“C” Coupling Outer Magnet

Location Dimension

Pump Design	“A” Dim.
U.S. Inch Design	10.43 inches
Metric Design	265 mm

INSTALLATION OF BUSHINGS

CARBON GRAPHITE

The canister bushing (see Figure 9 on page 8) requires a special fixture for proper assembly so the bushing is only sold as part of the canister assembly.

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 15 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.

Inch mm

.245 6.223

.242 6.147

Casing

Figure 15

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.

SECTION TSM 685.2 ISSUE C PAGE 10 OF 16