Charging System Stator (Alternator) Tests; Stator (Alternator) Replacement - Polaris 2012 RANGER RZR 570 INTL Service Manual

ELECTRICAL

Charging System Stator (Alternator) Tests

Three test s can be pe rformed u sing a mu lti-meter to
determine the condition of the stator (alternator).
TEST 1: Resistance Value of Each Stator Leg
1. Measure the r esistance valu e of e ach o f the thr ee
stator legs: Y1 to Y2, Y1 to Y3, and Y2 to Y3. Each
test should measure: 0.2 Ohms ± 15%
Connect Meter
Test
Leads To:
Battery Charge Coil
Battery Charge Coil
Battery Charge Coil
NOTE: If there are any significant variations in oh m
readings b etween t he three legs it is a n indic ation
that one of the stator legs may be weak or failed.
TEST 2: Re sistance Value of Eac h S tator Leg to
Ground
1. Measure the r esistance valu e of each of the stator
legs to gr ound: Y1 to Ground, Y2 to Ground, Y3 to
Ground.
Each test should measure: Open Line (OL)
Connect Meter
Test
Leads To:
Battery Charge Y1, Y2, or Y3
Coil to Ground
NOTE: Any meas urement ot her than Inf inity ( open)
will indicate a failed or shorted stator leg.
10.24
Y1
Y2
Y3
Ohms Reading
Y1 to Y2 0.2 ± 15%
Y1 to Y3 0.2 ± 15%
Y2 to Y3 0.2 ± 15%
Ohms Reading
Open Line
(Infinity)
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
TEST 3: Mea sure AC Voltage Out put of Each S tator
Leg at Charging RPM
1. Set the selector dial to measure AC Voltage.
2. Start the engine and let it idle.
3. While hold ing the eng ine at a
separately measure the voltage across each 'leg' of
the stator by connecting the meter leads to the wires
leading from the alternator (Y1 to Y2, Y1 to Y3, Y2 to
Y3).
4. Refer to the fo llowing table for approximate AC
Voltage readings according to RPM. Test each leg at
the specified RPM in the table.

Example: The alt ernator cu rrent ou tput reading
should b e approximately 21 VAC at
between each 'leg'.
NOTE: If one or more of the st ator leg output AC
voltage varies significantly from the specified value,
the stator may need to be replaced.
RPM Reading
1300
3000
5000

Stator (Alternator) Replacement

Refer to Chapter 3 (Engine / Cooling System) to service
the stator.
NOTE: The stator co ver ca n be remo ved with th e
engine installed in the chassis.
IMPORTANT: Be sure to thoroughly drain the engine
coolant and clea n the are a around the st ator cover
prior to removal. See chapter 3.
specified RPM,
1300 RPM
AC Voltage (VAC) Reading
22 VAC ± 25%
51 VAC ± 25%
85 VAC ± 25%