Kohler PRO 3.7 E - Page 8

Troubleshooting
8 37 690 01 Rev. AKohlerPower.com
Replace AVR
With engine stopped, replace AVR with a
new AVR. Start engine and adjust trimmer
on back of AVR. Test terminal voltage.
Voltage should be between 95-135V. If
voltage is met, original AVR is not adjusted
properly or faulty. Replace as necessary. If
voltage not met, check circuit breakers and
receptacles.
Unit Item
Generator Specifi cations
REMARK
GEN 5.0 PRO3.7/3.7E PRO5.2/5.2E PRO7.5/7.5E
Main Winding
Red-Blue 0.37Ω±10% 0.40Ω±10% 0.27Ω±10% 0.13Ω±10%
Red-White
(PRO 7.5 E)
White-Black 0.37Ω±10% 0.40Ω±10% 0.27Ω±10% 0.13Ω±10%
Field Winding
Between slip
ring
47.9Ω±10% 41.0Ω±10% 46.6Ω±10% 56.4Ω±10%
Exciter Winding Blue-Blue 1.30Ω±10% 1.72Ω±10% 1.60Ω±10% 1.02Ω±10%
DC Winding Orange-Orange - 0.11Ω±10% 0.10Ω±10% 0.08Ω±10%
Brush Length 9 mm
Service limit:
5 mm
NOTE: Alternator should not be in contact with panel, AVR, etc. during above resistance tests. Alternator should be
tested at room temperature.