Toro Groundmaster 31900, Руководство по обслуживанию

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PTO Switch
POSITION CLOSED
CIRCUITS
OFF
(DOWN)
COM B + NC B
COM C+ NC C
ON (UP) COM B + NO B
COM C+ NO C
The power take off (PTO) switch is located on the operator’s console. This
switch is pulled up to engage the PTO shaft and pushed down to disengage
the PTO shaft.
The TDM display/controller monitors the position of the PTO switch. Using
information from the PTO switch and other inputs, the TDM controller energizes
the electric PTO clutch coil to engage the PTO shaft.
Testing the PTO Switch
The PTO switch and its circuit wiring can be tested using the TDM
display/controller; refer to
Using the TDM Display/Controller Screens for
Troubleshooting (page 3–12) . If testing determines that the switch and circuit
wiring are not functioning correctly, proceed with the following test procedure:
1. Park the machine on a level surface, lower the cutting unit (or attachment),
engage the parking brake, set the key switch to the O
FF
position and remove
the key from the key switch.
2. Disconnect the battery negative (-) cable at the battery; refer to Removing
and Installing the Battery (page 6–64) .
3. Remove the operator’s console covers; refer to Removing and Installing the
Operator’s Console Covers (page 7–23) .
4. Disconnect the wire harness connector from the switch and remove the
switch from the console if necessary. Check the switch and the harness
connector for damage or corrosion and clean or repair if necessary.
5. Use a multimeter (ohms setting) and the preceding table to determine
whether continuity exists between the various terminals for each switch
position.
6. Replace the switch if necessary.
7. If the switch tests correctly and a circuit problem still exists, check the wire
harnesses; refer to Appendix A (page A–1) .
8. Install the switch and connect the wire harness after testing.
9. Install the console covers.
10. Connect the battery negative (-) cable at the battery.
Groundsmaster ® 3200, 3300 and 3310 Page 6–23 Electrical System: Testing the Electrical Components
19240SL Rev A