Kohler 10CC / 10CCOZ-Mobile — Voltage Regulator Test Procedure
Testing & diagnosis · PowerBoost V voltage regulator
For the Kohler 10CC / 10CCOZ-Mobile, from the Kohler service manual.
Applies to: Kubota V1305BG-2 engine
Before you start
- Hazardous voltage can cause severe injury or death. Do not touch voltage regulator heat sink when testing.
Procedure
- Disconnect P5 of wiring harness from P1 on voltage regulator.
- Connect components as shown in the regulator test figure.
- Turn variable transformer setting to zero; plug in; connect power source to terminals 5 and 6.
- Turn variable transformer on and turn SPST switch on; slowly increase voltage.
- Lamp should go on then turn off at preset voltage and stay off as voltage is further increased.
- If lamp does not turn on, set Volts pot to midpoint and repeat; replace regulator if it still fails.
- If lamp fails to turn off, set Volts pot to midpoint and repeat; replace regulator if it still fails.
- Turn variable transformer to zero, unplug AC cord, turn SPST switch off.
Tools required
- Step-up transformer 1:2 120 to 240 Volts Amazon
- Variable transformer 0-140 Volts Amazon
- 120 Volt 100 watt lamp Amazon
- AC Voltmeter 250 Volt minimum Amazon
- 1 Amp. fuse Amazon
- 1 SPST switch Amazon
- 120 Volt AC plug Amazon
- #14 AWG copper wire Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Preset voltage for a 120/240 Volt system is 240 Volts; for a 110/220 Volt system it is 220 Volts
Full service-parts list: Kubota V1305BG-2 engine →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.