Installation of Bushings, Assembly Coupling

INSTALLATION OF BUSHINGS

CARBON GRAPHITE:

When installing carbon graphite bushings, 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 and adding a chamfer on the bushing and the mating part will help in installation. The additional precautions listed below must be followed for proper installation:

When removing old bracket bushings, mark location of lubrication groove.

1.An arbor press must be used for installation.

2.Be certain bushing is started straight.

3.Do not stop pressing operation until bushing is in proper position, starting and stopping will result in a cracked bushing.

4.Check bushing for cracks after installation.

SILICON CARBIDE

When installing Silicon Carbide bushings into a metal part the mating part must be heated to 600° F (preferable in an oven). The bushing must be put into the proper position quickly before the mating part cools down and the bushing heats up. Failure to follow this procedure will result in cracked bushings.

ASSEMBLY COUPLING:

SERIES MD-C80 COUPLING

DANGER !

Follow these directions exactly to avoid injury to self or damage to pumping unit. Be careful to keep inner & outer magnets at least (1) foot apart until step 3. Do not engage magnets in any other fashion.

1.Inspect magnets for any steel objects attached to the magnets. Remove any foreign material. Place external retaining ring and key on pump shaft. Slide inner magnet assembly onto shaft so it butts against retaining ring. Install washer, lock washer and capscrew to secure magnet (See Figure 16). Insert a brass bar through a port between two rotor teeth and tighten capscrew.

canister	0.44”	secondary o-ring
	capscrew
	with hole
lock	inner
washer	magnet	primary o-ring
washer	external
	external
	retaining
	ring

figure 16

2.Inspect canister O-ring for signs of wear and replace if necessary. Slide canister over inner magnet and press over O-ring until canister meets the pump mounting flange.

3.Support the pump from overhead and secure coupling bracket to avoid tipping when pump is attached. Using the canister as a guide, slide the pump assembly up to the coupling bracket through the smaller opening. Secure with the four 0.5” capscrews. See Figure 17.

pump - bracket capscrews (4 required)

figure 17

4.The outer magnet should be installed into the bearing housing, if not refer to Disassembly & Assembly of Bearing Housing. Install hand knobs so that 4” of threads are projecting below housing. Support bearing housing from overhead and gently position magnet over canister so the magnet assemblies start to engage. Evenly back out the hand knobs. See Figure 18. the bearing housing move toward the bracket as the hand knobs are removed.

figure 18

5.Install the (4) 0.375” capscrews. Turn the output shaft over by hand to make sure the pump rotates freely. See

Figure 19).

0.375” capscrews (4 required)

figure 19

SECTION TSM 845	ISSUE F	PAGE 10 OF 14

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Viking KK823, KK825, KK827, K-825, K-823, K-827 Installation of Bushings, Assembly Coupling

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