Simplicity AGCO Allis 400 Series, Service & Repair Manual

Page: 55 / 136

Figure 34. PTO CLutch Terminals
C. Test Electric PTO Clutch
NOTE: Test the PTO clutch at normal operating temper-
ature. Run the unit with the PTO engaged for 1/2 hour
before testing.
NOTE: The following tests are more easily performed
with the PTO clutch removed. See Belt and Clutch
Replacement, Section 11, for removal procedure.
TEST PTO CLUTCH RESISTANCE
1. Set VOM to Ohms.
2. Unplug the PTO clutch connector.
3. Probe PTO clutch connector terminals.
The VOM should read 6.59 to 7.29 Ohms. If the clutch
resistance is not within this range, replace the clutch
assembly.
TEST ELECTRIC PTO CLUTCH FOR SHORT CIRCUITS
1. Set VOM to Ohms.
2. Probe the clutch body with the negative test lead.
3. Probe one of the connector terminals with the posi-
tive lead. The VOM Should show no continuity.
4. Probe the other connector terminal with the positive
lead. Again, the VOM should show no continuity.
If the VOM shows continuity to the clutch body from
either terminal, the clutch has an internal short and
should be replaced to prevent damage to the engine.
Terminals
Located
On Back
Side
Clutch Body
5 Electrical Troubleshooting
Hour Meter / PTO Clutch Tests
5 - 16
B. Test Power to Hour Meter (Where
Applicable)
1. Turn the ignition switch to RUN.
2. Set VOM to VDC.
3. Probe ground. Probe the positive wire (C, Figure 33)
at the hour meter terminal. The VOM should read
battery voltage. If not, check the key switch and all
wires and connections.
4. Probe ground. Probe the blue/white wire (D) at the
hour meter terminal. The VOM should read battery
voltage. If not, check the ignition switch, all wires and
connections, and the hour meter.
A. Hour meter
B. Two-Way Adapter
C. Wire, Positive
D. Wire, Negative
E. Lockwasher F. Nut, 1/4
G. Self-Stripping
Connector
H. Mounting Hardware
Figure 33. Hour meter Kit #1685535
TEST ELECTRIC PTO CLUTCH ENGAGING
1. Connect the PTO clutch terminals to a 12 VDC power
supply.
An audible “click” should be heard as the clutch
engages. If the clutch does not engage, replace the
clutch assembly.
Reconnect the clutch wire connector after testing.