15 PTO Clutch Service
Electrical Tests
15 - 4
PTO CLUTCH ELECTRICAL TESTS
(BENCH TESTS)
Check Resistance
See Figure 3.
1. Unplug the PTO clutch wire harness.
2. Using a volt/ohm meter (VOM) set to measure resis-
tance (ohms), probe PTO clutch wire harness termi-
nals.
The VOM should read 2.5 ~ 3Ω. If the clutch resistance
is not within this range, replace the clutch assembly.
Check for Short Circuits
See Figure 4.
1. Set VOM to Ohms.
2. Probe the clutch body with the negative test lead.
3. Probe one of the clutch wire harness terminals with
the positive lead. The VOM should show no continu-
ity.
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.
Figure 4. Checking PTO Clutch for Shorts
Figure 5. Testing PTO Clutch Electrical Operation
Figure 3. Checking PTO Clutch Resistance
Check Engagement
See Figure 5.
Connect the PTO clutch terminals to a 12 VDC power
supply such as a 12 volt battery.
An audible “click” should be heard as the clutch
engages. If the clutch does not engage, replace it.
Reconnect the clutch wire connector after testing.
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