TM 5-3810-289-12
1 Dome light box
29 Screw, cap %" x 1%"
57 Gauge, water
temperature
2 Washer 10# x "
30 Washer, spring lock "
58 Breaker, circuit
3 Washer, spring lock 10#
31 Nut, full "
59 Nut #10-24
4 Connector %"
32 Bracket
60 Switch, toggle
5 Conduit 3/4"
33 Washer, spring lock %"
61 Light, warning
6 Box %"
34 Nut, full %"
62 Socket, lamp
7 Cover
35 Support
63 Bracket
8 Bracket
36 Elbow %"
64 Switch
9 V-bolt
37 Bracket
65 Terminal
10 Conduit X"
38 V-bolt
66 Screw #10 x "
11 Conduit %"
39 Screw, cap 1/4" x 3/4"
67 Washer, spring lock
#10
12 Conduit "%"
40 Relay
68 Button, horn
13 Box 4"
41 Screw, cap %" x 1"
69 Shield
14 Conduit /4"
42 Washer, spring lock %"
70 Lamp
15 Floodlamp
43 Nut, full 3%"
71 Socket, lamp
16 Reducer 3/4"-%"
44 Nut, full 1"
72 Nut
17 Conduit 3/4"
45 Washer, spring lock 1"
73 Clamp
18 Screw, cap 3i" x 114"
46 Bracket
74 Washer, spring lock
19 Dome light box
47 Nut
75 Nut
20 Nipple, terminal
48 Horn
76 Screw, cap
21 Tongue, terminal ring
49 Horn
77 Lens
22 Connector %"
50 Gauge, oil pressure
78 Gasket
23 Coupling, pipe %"
51 Screw #8-32 x %"
79 Lamp
24 Nipple, chase 5"
52 Panel, instrument
80 Body assembly
25 Locknut, conduit 5"
53 Screw #10-24 x A"
81 Ring
26 Elbow %"
54 Lamp, panel
82 Screw, cap
27 Washer, spring lock "
55 Gauge, battery indicator
83 Sealed beam unit
28 Nut, full %"
56 Gauge, fuel
Figure 4-31. Horns, lights and control panel.
4-46.
Battery and Battery Cables
(4) Replace a cracked or leaking battery.
a. Inspection. If the battery requires frequent
c. Test. Test the specific gravity of each cell
addition of water and is gassing excessively, it. If in
with a hydrometer. A reading of 1.270 to 1.285 indicates
good condition, it is undoubtably due to overcharging. If
fully charged; 1.230, half charged; and 1.150, dead.
one or more cells continually require more water than
Never take a reading just after adding water for the
others, it is an indication of a damaged cell which should
reading will not be true.
be checked by the maintenance repair.
b. Service.
Caution: Do not allow battery to stand in the
(1) Do not allow the surface of the
discharged state.
It will become ruined by
electrolyte to get below the top of the separators. Use
sulphation.
only clean, distilled water to keep the battery filled. Do
Note. It is especially important in cold weather
not fill higher than just below the bottom of the filling
to test the specific gravity. A battery freezes between
tube, for "gassing" will cause the electrolyte to spill over.
the temperatures 20 degrees above zero and 50
Never add acid to the battery, as this will give a false
degrees below zero depending on the state of its charge.
reading as to the condition of the battery.
Do not add water after shutting down for the night, or it
(2) Keep the terminals tight and clean. If
will freeze quickly; see that it gets a charge after adding
they show a tendency to corrode, clean and apply a thin
water.
coat of vaseline to protect them from the acid. Keep the
outside of the battery clean. Neutralize any electrolyte
d. Replace. Refer to figure 4-32 to replace the
that may be on the metal surfaces with a cloth saturated
batteries or battery cables.
with ammonia or bicarbonate of soda solution (one
Caution: Always disconnect the negative
pound of baking soda to one gallon of water), then wash
cable first when removing batteries and connect the
off with water and dry.
negative cable last when installing batteries.
(3) Clean vent hole in filler caps before
installing.
4-42
