Terex Fermec 760, Обучение по обслуживанию, Страница: 37 / 116

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37
Servicing the end cover and brush car-
rier
Service the end cover and brush carrier as follows:
1. Open the hood.
NOTE : If space within the engine compartment per-
mits the removal of the motor body bolts (3), the end
cover can be serviced without removing the starter
motor from the engine, provided that the electrical
cables to the starter are disconnected.
2. If the end cover cannot be removed in situ,
remove the starter motor.
3. Remove the end cover securing screws (2), and
both long bolts (3).
4. Lift off the cover (4) complete with brake assem-
bly.
5. Remove the brake shoes (5) from the cover (4).
6. Remove the steel washer (6) and fibre washer
(7).
7. Lift the springs and disengage the field coil
brushes (8).
8. Remove the brush carrier assembly (9).
9. Polish the commutator with 600 to 1200 grade
abrasive cloth/paper.
10. Thoroughly clean all components with white
spirit and dry with compressed air.
11. Measure the length of the brushes (8). Replace
the brushes which are 8 mm (5/16 in) or less in
length.
12. Install the brush carrier assembly (9).
789M060A
789M061A
13. Lift the springs and engage the brushes (8).
14. Test the strength of each brush spring and
replace any which exert less than 11.6 N (42
oz.) with new brushes fitted.
15. Install the fibre washer (7), the steel washer (6)
and the brake shoes (5) in the cover (4).
16. Turn the armature to position to drive-dogs (10)
to engage the brake shoes (5).
17. Install the cover (4), the long bolts (3) and the
screws (2).
18. Torque tighten the long bolts (3) to 11 Nm (8 lbf
ft).
19. Check the clearance between the armature
spindle and the brush (1). If the clearance is
noticeable, replace the brush (1), refer to page
replacing brushes.
20. If necessary, install the starter motor, refer to
install starter page.
21. Close the hood.
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