TM 5-2420-230-24-2
Specifications
B3.9 and B5.9 Series Engines
Page E-24
Section E - Engine Identification
4B Electrical System Data (nonautomotive)
4B3.9
4BT3.9
4BTA3.9
Minimum Recommended Battery
Capacity @ -18C [0F]
With Light Accessories*
12-VDC Starter
625CCA
625CCA
625CCA
24-VDC Starter
312CCA
400CCA
400CCA
With Heavy Accessories**
12-VDC Starter
800CCA
800CCA
800CCA
24-VDC Starter
400CCA
400CCA
400CCA
Maximum Allowable Resistance
of Starting Circuit
With 12-VDC Starter - Ohms
0.0012
0.0012
0.0012
With 24-VDC Starter - Ohms
0.0020
0.0020
0.0020
* Typical light accessories include alternator, small steering pump, and disengaged clutch.
** Typical heavy accessories include hydraulic pump and torque converter.
6B Electrical System Data (nonautomotive)
6B5.9
6BT5.9
6BTA5.9
Minimum Recommended Battery
Capacity @ -18C [0F]
With Light Accessories*
12-VDC Starter
800CCA
800CCA
800CCA
24-VDC Starter
400CCA
400CCA
400CCA
With Heavy Accessories**
12-VDC Starter
950CCA
950CCA
950CCA
24-VDC Starter
475CCA
475CCA
475CCA
Maximum Allowable Resistance
of Starting Circuit
With 12-VDC Starter - Ohms
0.0012
0.0012
0.0012
With 24-VDC Starter - Ohms
0.0020
0.0020
0.0020
* Typical light accessories include alternator, small steering pump, and disengaged clutch.
** Typical heavy accessories include hydraulic pump and torque converter.
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