Test 9 - Test Stator - Generac Power Systems 4451 & 4986 Repair Manual

14
WIRE 14
REMOVED
14
R1
4
4
Figure 6-17. – Diode Test Step 9
10. Connect one meter test lead to the top terminal of the resistor
(R1). Connect the other meter test lead to the ground terminal.
INFINITY or an open condition should be measured.
11. Reconnect the six pin connector, reconnect the C1 connector,
reconnect the two wires removed from the resistor (R1).
RESULTS:
1. If the diode or resistor failed any step it should be replaced.

TEST 9 - TEST STATOR

PROCEDURE:
1. From the 50 Amp circuit breaker, disconnect Wires 11 and 44.
2. From the 50 Amp receptacle disconnect Wire 22.
3. Disconnect Connector C1. See Page 17 for connector location.
4. Set a voltmeter to measure resistance.
5. Connect the meter test leads across Stator leads 11 and 22.
Normal power winding resistance should be read.
6. Connect the meter test leads across Stator leads 44 and 22.
Normal power winding resistance should be read.
7. Connect the meter test leads across Stator leads 11S (Pin 1)
and Stator lead 44S (Pin 2) at the C1 connector female side.
See Figure 6-18. Be careful not to damage the pin connectors
with the test leads, use paper clips - do not force probes into
connectors. Normal power winding resistance should be read.
8. Connect the meter test leads across Stator leads 66A (Pin 4)
and Stator lead 77A (Pin 5) at the C1 connector female side.
See Figure 6-18. Be careful not to damage the pin connectors
with the test leads, use paper clips - do not force probes into
connectors. Normal battery charge winding resistance should
be read.
25 ohm
D2
77A
66A
2
PIN
LOCATION
6
PIN
55
LOCATION
7
6
66
Figure 6-18. – C1 Connector, Female Side
9. Connect the meter test leads across Stator leads 2 (Pin 6)
and Stator lead 6 (Pin 7) at the C1 connector female side. See
Figure 6-18. Be careful not to damage the pin connectors with
the test leads, use paper clips - do not force probes into con-
nectors. Normal excitation winding resistance should be read.
10. Connect the meter test leads across Stator leads 66 (Pin 9)
and Stator lead 77 (Pin 10) at the C1 connector female side.
See Figure 6-18. Be careful not to damage the pin connectors
with the test leads, use paper clips - do not force probes into
connectors. Normal 10 Amp battery charge winding resistance
should be read.
Winding Wire Models
Numbers 004451-0
004986-0
Power 11 & 22 0.125
Power 44 & 22 0.125
Sensing 11S & 44S 0.25
Excitation 2 & 6 0.576
Battery 66A & 77A 0.132
Charge
10A 66 & 77 0.145
Battery
Charge
* Resistance values In ohms at 20° C. (68° F.). Actual
readings may vary depending on ambient tempera-
ture. A tolerance of plus or minus 5% is allowed.
11. Connect the meter test leads across Stator lead 11 and frame
ground. INFINITY should be read.
10. Connect the meter test leads across Stator lead 66A (Pin 4)
and Stator lead 2 (Pin 6) at the C1 connector female side and
frame ground. Be careful not to damage the pin connectors
with the test leads, use paper clips - do not force probes into
connectors. See Figure 6-18. INFINITY should be read.
section 6
Diagnostic tests
55A
11S
PIN
LOCATION
44S
1
PIN
LOCATION
0
77
12
4
Models Models Models
004582-0,1 004582-2 004583-0
004987-0 004987-1 005308-0
005209-0
0.088 0.088 0.067
0.088 0.089 0.067
0.176 0.176 0.134
0.546 1.270 1.010
0.111 0.111 0.103
0.125 0.125 0.117
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