Page 164 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Fig 1

TASK 7: Check end cover’s shaft bushes
1 Use a 10mm rod, take out the bush cap.
2 Measure the internal diameter of the drive bush.
3 Measure the outer diameter of the armature shaft at the drive end. (Fig 1)
4 If clearance exceeds the limit, replace the bush.

5 Use the tool as shown in the Fig 2, remove the bush from the drive housing on the arbour press.

Fig 1 Fig 2

6 Measure the internal diameter of the commutator end bush (2). (Fig 3)

7 Measure the outer diameter of armature shaft at the commutator end.
8 If clearance exceeds the limits, replace the bush.
9 Thread in a 12mm tap (1) in the bush.(Fig 3 & 4).
10 When the end of the tap reaches the bottom of the frame (3), tighten it further.
11 The bush will come out.
12 Fit new bushes as press fit on the arbour press.

13 Ream the inside surface of the bush to obtain oil clearance (0.05mm) between the armature shaft and bush.

147

CITS : Automotive - Mechanic Diesel - Exercise 9.2