Battery Testing. Test batteries with hydrometer.
Always test a battery before adding water. The
specific gravity between the cells should be
within 0.025. A dangerously low point of charge
indicated by a hydrometer reading of 1.150 or
less will cause the batteries to freeze at 5°F (-
15°C). With specific gravity of 1.280 the batter
will withstand temperatures as low as -65°F (-
53.88C) without freezing. An acceptable
hydrometer reading of 1.270 to 1.280 at 80F
(26.66C) will be obtained from a fully charged
battery (2.2 to 2.4 volts DC per cell).
Replacement. (See figure 4-9). (1) Disconnect
both battery negative cables (2 and 5) both
positive cable (3 and 4) and both jumper cables
(1) from storage batteries (10).
Remove the eight nuts (6) and washers
(7) and remove the four battery hold-down
channels (8). It is necessary to remove
Lift batteries out.
Reinstall batteries in tray (install so that
terminals are oriented as shown).
Install the batter hold-down channels (8)
onto studs (9) with washers (7) and nuts
Connect cables as shown in figure 4-9.
Section IX. MAINTENANCE OF MUFFLER AND EXHAUST
4-17. GENERAL. The muffler and exhaust, figure 4-11,
expel engine exhaust gases from the engine manifold
through the turbochargers, metal exhaust hoses,
mufflers, and out through the muffler rain caps. The
counterbalancing rain cap opening and closing.
Be sure that the exhaust is not fed
back into the system, or back into the
immediate area of working personnel.
Exhaust may be injurious to health.
4-18. MUFFLER AND EXHAUST REPLACEMENT.
(See figure 4-11).
Allow exhaust pipe and muffler to cool
if engine has been running.
Remove the eight screws (1), the eight split
lockwashers (2) and the eight hex nuts (3).
Remove the four screws (5) securing the front
mounting brackets, the four split lockwashers
(6), and muffler (8).
Remove rain cap (7) from the muffler (8).
Separate and remove the upper and lower
Remove the eight screws (9), lockwashers (10),
and nuts (11) which attach metal exhaust hose
(12) to exhaust elbow (16) and remove metal
exhaust hose (12).
Remove gasket (14).
Repeat steps a. through f. for the other side of
the exhaust system.
Reassemble gasket (14) between exhaust elbow
(16) and metal exhaust hose (12).
Install eight screws (9), lockwashers (10), and