TP-6694 7/18 73Section 3 Scheduled Maintenance
4321
12 34
KW-272000-B
1. To positive (+) terminal on starter solenoid.
2. To ground (--) terminal on or near starter motor.
3. To positive (+) terminal on second starter solenoid.
4. To ground (-- ) terminal on or near second starter motor.
Figure 3-9 24-Volt Engine Electrical System Dual
Starter Motors Typical Battery
Connections
3.10.1 Clean Battery
Clean the battery and cables and tighten the battery
terminals according to the service schedule
recommendations. Clean the battery by wiping it with a
damp cloth. Keep the electrical connections dry and
tight.
If corrosion exists, disconnect the cables from the
battery and remove the corrosion with a wire brush.
Clean the battery and cables with a solution of baking
soda and water. Do not allow the cleaning solution to
enter battery cells. Flush the battery and cables with
clean water and wipe the battery with a dry cloth.
After reconnecting the battery cables, coat the terminals
with petroleum jelly, silicon grease, or other
nonconductive grease.
3.10.2 Electrolyte Level Inspection
Check the electrolyte level and specific gravity of
batteries that have filler caps. Maintenance-free
batteries do not require electrolyte level checking or
specific gravity testing.
Check the electrolyte level at the specified interval.
Remove the filler caps and verify that the electrolyte
level reaches the bottom of each filler hole. See
Figure 3-10. Refill as necessary with distilled water or
clean tap water. Do not add fresh electrolyte. Tighten
the filler caps. After adding water during freezing
temperatures, run the generator set 20--30 minutes to
mix the electrolyte and the water to prevent battery
damage from freezing.
1-046
1
2
1. Filler caps
2. Electrolyte level
Figure 3-10 Battery Electrolyte Level Inspection
3.10.3 Specific Gravity Check
Use a battery hydrometer to check the specific gravity of
the e lectrolyte in each battery cell of batteries with filler
caps. Holding the hydrometer vertically, read the
number on the glass bulb at the top of the electrolyte
level or the number adjacent to the pointer. If the
hydrometer used does not have a correction table,
consult Figure 3-12. Determine the specific gravity and
electrolyte temperature of the battery cells. Locate the
temperature in Figure 3-12 and correct the specific
gravity by the amount shown. The battery is fully
charged if the specific gravity is 1.260 at an electrolyte
temperature of 26.7_C(80_F). Maintain the specific
gravities between cells within 0.01 of each other.
Charge the battery if the specific gravity is below 1.215
at an electrolyte temperature of 26.7_C(80_F).
Note: Some battery testers have four or five beads in a
test tube. Draw electrolyte into the tube as with
the battery hydrometer described in this section
or use the manufacturer’s instructions. Use
Figure 3-11 to interpret typical test results.
Number of Floating Beads Battery Condition
5 Overcharged
4 Fully charged
3 A good charge
1or2 A low charge
0 A dead battery
Figure 3-11 Bead-Type Test Interpretation
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