Section V. ENGINE ELECTRICAL SYSTEM
79. General
The electrical system of the jaw crusher is a 24-volt system which consists of four batteries, generator, generator
regulator, starter, oil pressure gage and sending unit, water temperature gage and sending unit, battery indicator gage,
overspeed governor, safety ignition switch, and the necessary wiring and connectors to complete the system. Figure 1 is
a wiring diagram for the jaw crusher electrical systems.
80. Batteries and Cables
a. Testing.
Use a hydrometer to test each battery cell; each cell should read 1.280 specific gravity at 80F. Recharge if the
(1)
reading is 1.250 or less.
(2) Use a voltmeter to test each cell for voltage. Each full charged cell must deliver 2 volts. A low voltage
indicates a low charge or a defective cell. Recharge the battery if the output voltage varies more than 30
percent between cells, replace the battery.
Warning: Do not smoke or allow an open flame near charging batteries. Serious injury from
explosion and acid could result. Avoid spilling electrolyte on clothing or flesh. Acid causes severe
burns.
b. Removal.
(1) Loosen locknut (fig. 6) and place clamp handle up or at right angle to battery terminal.
(2) Remove cables from battery terminals; inspect clamps for loose or corroded condition. Remove corrosion and
coat battery terminals and clamps with grease.
c. Cleaning and Inspection. Clean and inspect the batteries. Replace as necessary.
d. Installation.
(1) Install the batteries as instructed on figure 6.
(2) Install the cables as instructed in (2) and (3)
81. Battery Box
a. Removal.
(1) Remove the batteries and cables (par. 80).
(2) Remove the battery box as instructed on figure 29.
b. Disassembly. Disassemble the battery box as illustrated on figure 30.
c. Cleaning, Inspection, and Repair. Clean and inspect the battery cables and box. Repair or replace all damaged
parts.
d. Reassembly. Reassemble the battery box as illustrated on figure 30.
e. Installation.
(1) Install the battery box in reverse of instructions on figure 29.
(2) Install the batteries and cables (par. 80).
82. Battery Charging Receptacle
a. Removal. Remove the battery charging receptacle as instructed on figure 31.
b. Cleaning and Inspection. Clean and inspect the battery charging receptacle for damage or defects. Replace a
defective receptacle if necessary.
c. Installation. Install the battery charging receptacle in reverse of instructions on figure 31.
83. Generator Regulator
a. Removal. Remove the generator regulator from the jaw crusher as instructed on figure 32.
b. Cleaning, Inspection, and Repair. Clean and inspect. Replace a worn, damaged, or defective generator regulator.
c. Installation. Install the generator regulator in reverse of the instructions on figure 32.
Caution: The engine generator must be polarized whenever the leads to the generator or regulator have been
removed or any adjustments have been made to the generator regulator. Failure to polarize the generator may
cause the regulator contacts to be damaged by
AGO 8156A
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