TM 5-6115-434-12
temperature corrections. Refer to table 2-2 and establish the state of charge of batteries with specific gravity corrected to
80°F.
(d)
Check that battery vent cap holes are open and install vent caps on batteries.
(e)
Remove any corrosion from battery terminals or terminal lugs using a solution of sodium bicarbonate
or an approved cleaning compound. Apply an approved corrosion preventive compound to battery terminals and
terminal lugs.
(f)
If batteries are disconnected, connect batteries as shown in figure 2-1, then reinstall battery cover
and secure with wingnuts.
(2)
New batteries.
(a)
New batteries are normally shipped dry charged. Remove battery vent caps. Add electrolyte of
specified specific gravity (1.285 at 69F) to level indicated on batteries. If batteries already contain electrolyte, add pure
distilled water to each cell until proper electrolyte level is reached. If batteries do not have electrolyte level markers, add
distilled water to each cell until electrolyte level is 3/8 inch above cell plates. Check that vent holes in vent caps are
open, then install vent caps.
Warning
If battery electrolyte is spilled on clothing, immediately wash with cold water or a sodium
bicarbonate solution to prevent severe skin burns or damage to clothing.
Caution
Avoid spilling battery electrolyte on painted surfaces. Damage to painted surfaces may result.
(b)
Install batteries in battery box and connect as shown in figure 2-1. Apply an approved corrosion
preventive compound to terminals and terminal lugs. Install battery cover and secure with wingnuts.
Table 2-1. Hydrometer Specific Gravity Temperature Corrections
Degrees Fahrenheit
Gravity corrections
+120
+0.016
+115
+0.014
+110
+0.012
+105
+0.010
+100
+0.008
+95
+0.006
+90
+0.004
+85
+0.002
+80
0
+75
-0.002
+70
-0.004
+65
-0.006
+60
-0.008
+55
-0.010
+50
-0.012
+45
-0.014
+40
-0.016
+35
-0.018
+30
-0.020
+25
-0.022
+20
-0.024
+15
-0.026
+10
-0.028
+5
-0.030
0
-0.032
+5
-0.034
-10
-0.036
-15
-0.088
-20
-0.040
Table 2-2. State of Charge With Specific Gravity Corrected to 80 °F
Specific Gravity
State of charge, percent
1.280
10
1.250
76
1.220
50
1.190
25
1.160
Little useful capacity
1.130
Discharged
c.
Fuel and Lubrication System Depreservation and Servicing.
(1)
Open oil tank access door (fig. 1-1) and fill oil tank with oil as specified. (Refer to current Lubrication
Order.)
(2)
Connect a source of fuel to power unit fuel inlet fitting (fig. 1-2) as described in paragraph 2-b(2).
(3)
Remove engine combustor access panel (fig. 1-2). Disconnect fuel line from fuel atomizer and connect a
line to drain outboard into a suitable container. (fig. 2-2.)
(4)
Place the master switch on the instrument panel momentarily in the START position, (para 2-14) to motor
the engine by starter motor action for 10 to 15 seconds and allow fuel to discharge from the outboard drain line.
2-3
