Cummins Engine B3.9L Specifications - Genie S-100 Service And Repair Manual

March 2017
Cummins B3.9L Engine
Displacement
Number of cylinders
Bore and stroke
Horsepower
Firing order
Compression ratio
Compression pressure
pressure (psi or bar) of the lowest cylinder must be at
least 75% of the highest cylinder.
Low idle rpm
Frequency
High idle rpm
Frequency
Valve clearance, cold
Intake
Exhaust
Lubrication system
Oil pressure
Oil capacity
(including filter)
Oil viscosity requirements
Unit ships with 15W-40.
Extreme operating temperatures my require the use of
alternative engine oils. For oil requirements, refer to the
Engine Operator Handbook on your machine.
Part No. 1268494
Injection system
Injection pump make
238 cu in
Injection pump pressure
3.9 liters
4
Injector opening pressure
4.02 x 4.72 inches
102 x 120 mm
Fuel requirement
75 @ 2200 rpm
For fuel requirements, refer to the engine Operator's
1 - 3 - 4 - 2
Manual on your machine.
16.5:1
Alternator output
Battery - System
Type
Quantity
1300 rpm
AH rating
368.3 Hz
Cold cranking ampere
Reserve capacity @ 25A rate
2350 rpm
665.8 Hz
Battery - Engine starting
Type
Quantity
0.010 in
AH rating
0.254 mm
Cold cranking ampere
0.020 in
Reserve capacity @ 25A rate
0.508 mm
Cooling system
Engine capacity
50 psi
3.45 bar
System capacity
9.5 quarts
9 liters
S-100 • S-105 • S-120 • S-125
Section 2 • Specifications
SPECIFICATIONS
Bosch
5500 psi
379.2 bar
3480 psi
240 bar
63A, 12V DC
12V, Group 27TM
109AH
630A
160 minutes
12V, Group 4D
190AH
1020A
325 minutes
8.8 quarts
8.3 liters
20 quarts
18.9 liters
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