Page 231 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

Dismantling, assembling of different types of bearing and

check for functionality

Objectives : At the end of this exercise you shall be able to
• dismount a shaft from pedestal block.
• mount a shaft on pedestal block
• dismount ball bearing (interference fit on the shaft)
• dismount ball bearing (interference fit in the housing)
• mount ball bearing.

Job Sequence

TASK 1: Dismatling and assembiling bush bearing

• Dismantle the cap of the block by using proper ring spanner. Hold the shaft with left hand and remove the
fastening nut by right hand as shown in Fig 1.

• Remove top shell along with cap Fig. 2a and then remove the shaft and bottom housing as shown in Fig 2b.

• Thoroughly clean shells, cap, shaft seating (Journal) and housing bottom with kerosene by using small brush.
Wipe out all above components with clean banian cloth. Do not use cotton waste to wipe out component.
• Check shells and Journal for any damage, scoring mark etc. Check cap, bottom housing and fastening bolt
and nut for any damage and wear. Replace the damaged components with new one before starts assembling.
(Fig 3). If it is not possible to replace shaft, it should be built by metal deposition and machined.

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CITS : C G & M - Fitter - Exercise 94