Spec Sheet

G4-305 (38RCLC) 6/21
Alternator Specifications
Specifications Alternator
Manufacturer Kohler
Exciter type Brushless, Wound-Field
Leads: quantity, type
4E8.3 4, 120/240
4D8.3 12, Reconnectable
Voltage regulator Solid State, Volts/Hz
Material Class H
Temperature rise
130_C, Standby
Bearing: quantity, type 1, Sealed
Coupling Flexible Disc
Unbalanced load capability 100% of Rated Standby
Current
One-step load acceptance 100% of Rating
Peak motor starting kVA: (35% dip for voltages below)
240 V 4E8.3 (4 lead) 74 (60 Hz)
480 V, 380 V 4D8.3 (12 lead) 120 (60Hz) 88(50Hz)
D
NEMA MG1, IEEE, and ANSI standards compliance for
temperature rise and motor starting.
D Sustained short- circuit current of up to 300% of the rated
current for up to 10 seconds.
D Sustained short-circuit current enabling downstream circuit
breakers to trip without collapsing the alternator field.
D Self-ventilated and drip-proof construction.
D Windings are vacuum-impregnated with epoxy varnish for
dependability and long life.
D Superior voltage waveform from a two-thirds pitch stator and
skewed rotor.
D Total harmonic distortion (THD) from no load to full load with
a linear load is less than 4%.
Application Data
Engine
Engine Specifications 60 Hz 50 Hz
Manufacturer Kohler
Engine: model, type Residential Powertrain
KG2204T, 2.2 L, 4-Cycle
Turbocharged
Cylinder arrangement In-line 4
Displacement, L (cu. in.) 2.2 (134.25)
Bore and stroke, mm (in.) 91 x 86 (3.5 x 3.4)
Compression ratio 10.5:1
Piston speed, m/min. (ft./min.) 310 (1016) 258 (847)
Main bearings: quantity, type 5, plain alloy steel
Rated rpm 1800 1500
Max. power at rated rpm, kW (HP)
LPG 47.8 (64.1) NA
Natural Gas 47.6 ( 63.9) NA
Cylinder head material Cast Iron
Piston type and material High Silicon Aluminum
Crankshaft material Nodular Iron
Valve (exhaust) material Forged Steel
Governor type Electronic
Frequency regulation, no-load to
full-load
Isochronous
Frequency regulation, steady state 1.0%
Frequency Fixed
Air cleaner type Dry
Engine Electrical
Engine Electrical System
Ignition system Electronic
Battery charging alternator:
Ground (negative/positive) Negative
Volts (DC) 14
Ampere rating 90
Starter motor rated voltage (DC) 12
Battery, recommended rating for - 18_C(0F):
Qty., cold cranking amps (CCA) One, 630
Battery voltage (DC) 12
Battery group size 24
Exhaust
Exhaust System 60 Hz 50 Hz
Exhaust manifold type Dry
Exhaust temperature at rated kW, dry
exhaust, _C(_F)
633 (1171)
Maximum allowable back pressure,
kPa (in. Hg)
7.5 (2.2)
Fuel
Fuel System
Fuel type Natural Gas or LPG
Fuel supply line inlet 1 in. NPT
Natural gas fuel supply pressure, kPa
(in. H
2
O)
1.2- 2.7 (5-11)
LPG vapor withdrawal fuel supply
pressure, kPa (in. H
2
O)
1.2- 2.7 (5-11)
Fuel Composition Limits *
Nat. Gas LP Gas
Methane, % by volume 90 min. —
Ethane, % by volume 4.0 max. —
Propane, % by volume 1.0 max. 85 min.
Propene, % by volume 0.1 max. 5.0 max.
C
4
and higher, % by volume 0.3 max. 2.5 max.
Sulfur, ppm mass 25 max.
Lower heating value,
MJ/m
3
(Btu/ft
3
), min.
33.2 (890) 84.2 (2260)
* Fuels with other compositions may be acceptable. If your fuel is
outside the listed specifications, contact your local distributor for
further analysis and advice.
Lubrication
Lubricating System
Type Full Pressure
Oil pan capacity, L (qt.) w
4.2 (4.4)
Oil added during oil change (on average),
L (qt.) w
3.3 (3.5)
Oil filter: quantity, type w
1, Cartridge
Oil cooler Remote
w Kohler recommends the use of Kohler Genuine oil and filters.