Kohler KT735 [57/96] Electrical system

Electrical System

5732 690 03 Rev. I KohlerEngines.com

BATTERY CHARGING SYSTEM

NOTE: Observe following guidelines to avoid damage to electrical system and components:

● Make sure battery polarity is correct. A negative (–) ground system is used.

● Disconnect rectifi er-regulator plug and/or wiring harness plug before doing any electric welding on equipment

powered by engine. Disconnect all other electrical accessories in common ground with engine.

● Prevent stator (AC) leads from touching or shorting while engine is running. This could damage stator.

Most engines are equipped with a 12/15 amp regulated charging system. Some have a 25 amp regulated charging

NOTE: When installing rectifi er-regulator, take note of terminal positions and install plug correctly.

NOTE: Disconnect all electrical connections attached to rectifi er-regulator. Testing may be performed with rectifi er-

regulator mounted or loose. Repeat applicable test procedure 2 or 3 times to determine condition of part.

Rectifi er-regulator is mounted on backing shroud assembly. To replace it, disconnect plug, remove mounting screws,

and ground lead.

Testing rectifi er-regulator may be performed as follows, using appropriate rectifi er-regulator tester.

To test 25 amp rectifi er-regulators:

1. Connect single lead adapter in between B+ (center)

terminal of rectifi er-regulator being tested and

squared single end of tandem adapter lead.

AC terminal on rectifi er-regulator.

5. Plug tester into proper AC outlet/power for tester

being used. Turn on power switch. POWER light

should be illuminated and 1 of 4 status lights may be

on as well. This does not represent condition of part.

6. Press TEST button until a click is heard and then

release. Momentarily 1 of 4 lights will illuminate

indicating partial condition of part.

To test 12/15 amp rectifi er-regulators:

1. Connect tester ground lead (with spring clamp) to

body of rectifi er-regulator being tested.

2. Connect tester red lead to B+ terminal of rectifi er-

3. Plug tester into proper AC outlet/power for tester

release. Momentarily 1 of 4 status lights will