Quantcast Removal. - TM-10-3930-620-340059

 

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Figure 3-19. Capacitor and diode assembly with resistor assemblies.
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Table 3-1. Protective Circuit Voltage Tests
KEY to fig 3-19:
38.
Scre%w
1.  Screw
39.
Flexible lead
2.  Washer
40.
Marker.B2-
3.  Nut
41.
Diode
4.  Lead
42.
Marker A2
5.  Screw
43.
Diode
6.  Washer
44.
Nut (2)
a.  Nut
45.
Lock washer (2)
8.  Lead
46.
Screw (2)
9.  Cable nipple
47.
Diode
10. Lead
48.
Flexible lead
11. Screw
49.
Marker.A1
12. Washer
50.
Screw (3)
13. Nut
51.
Lock washer (3)
14. Lead
52.
Diode support
15. Screw
53.
Marker, B2+
16. Washer
54.
Link, short (2)
17. Nut
55.
Link, long (4)
18. Lead
56.
Clamp
19. Screw
57.
Weather strip
Capacitor, 1000 F (2)
20. Washer
58.
Capacitor, 5500 F (2)
21. Nut
59.
22. Lead
60.
Screw (2)
23. Screw
61.
Lock washer (2)
24. Washer
62.
Screw 131
25. Nut
63.
Lock washer (3)
26. Lead
64.
Standoff insulator (3)
27. Nut
65.
Label
28. Lock washer
66.
Base assembly
29. Washer (2)
67.
Nut (2)
30. Screw
68.
Lock washer (2)
31. Nut
69.
Screw (2)
32. Lock washer
70.
Resistor assembly
33. Washer (2 )
71.
Nut (2)
34. Screw
72.
Lock washer (2)
35. Nut
73.
Screw (2)
36. Lock washer
74.
Resistor assembly
37  Washer (2)
(7)  Measure D3 backward resistance by reversing
(2)  Check capacitors for cracks and electrolyte
the connections. Backward-to-forward resistance ratio should
leakage.
be at least 10 to 1.
(3)  Check wire leads for continuity using ohmmeter.
f.  Reassembly.  Reassemble in the reverse order of
(8)  Test the capacitors as follows:
(a)  Connect the positive ohmmeter lead to
figure 3-19. Be sure that weatherstrip (57) is under adjustable
metal clamp (561.
terminal B2+.
(b)  Touch the negative ohmmeter lead to the
Note.  Silicone grease must be applied to
left-most capacitor terminals, and then to the right-most
the mating surfaces between the diode
terminals.
support (52) and diodes l, D2, and D3.
(c)  In each case, the meter pointer should
g.  Installation. Install the capacitor and diode assembly
swing toward zero and then rise.
using the two screws (60, fig. 3-19) and lock washer (61).
(9)  Reconnect  the  D3  lead  to  the  capacitor
Reconnect leads.
connection.
3-11. Protective Circuit
c.  Removal.
a.  Test.
(1)  Tag and disconnect all leads coming to terminals
(1)  Use cardboard to insulate all forward and reverse
Al, A2, B2-, and B2+.
contacts in the contactor unit (except EC contactor).
(2)  Remove the two screws (60) and lock washers
Note.
Seat must be depressed and
(61)1.
emergency stop switch released.
d.  Disassembly. Disassemble by following the sequence
(2)  Connect voltmeter positive lead to terminal B+
and the negative lead to terminal 35 of the protective circuit.
e.  Inspection of parts.
(fig.  3-12.) Select a voltage range higher than the battery
(1)  Visually inspect all parts for evidence of damage,
voltage.
including terminals and wire leads. Pay particular attention to
(3)  Turn the key switch on. The voltmeter
the mating surfaces of the diode support (52, fig. 3-19) and
diodes. Clean off the old silicone grease on these surfaces.
3-31

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