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Greensmaster 3320/3420Page 6 -- 74Electrical System
Service and Repairs
Verify Interlock System Operation
CAUTION
The interlock switches are for the operator’s
protection; do not disconnect them. Check the
operation of the switches daily to assure the in-
terlock system is operating. If a switch is defec-
tive, replace it before operating the machine.
The purposes of the interlock system are to:
A. Prevent the engine from cranking or starting un-
less the functional control lever is in NEUTRAL.
B. Prevent operating the traction pedal with the
functional control lever in NEUTRAL.
C. Prevent operating the traction pedal with the
parking brake engaged.
D. Shut off the engine if the operator leaves the seat
without the functional control lever in NEUTRAL.
E. Shut off the cutting reels if the functional control
lever is moved to NEUTRAL or TRANSPORT.
Interlock Switch Verification
1. Sit on the seat, engage parking brake and move
functional control lever to NEUTRAL. Try to depress
traction pedal. If the pedal does not depress, the inter-
lock systemis operating correctly. Correct problemif not
operating properly.
2. With the engine not running, sit on the seat, engage
parking brake, keep traction pedal in neutral and place
functional control lever in MOW or TRANSPORT. Try to
start the engine. If the engine does not crank, the inter-
lock system isoperating correctly. Correctproblem ifn ot
operating properly.
3. Sit on the seat and engage the parking brake. Start
the engine and move the functional control lever to
MOW.If the enginestops, theinterlock systemis operat-
ing correctly. Correct problem if not operating properly.
4. Sitontheseat and startengine.Move functionalcon-
trol lever to MOW. Raise off the seat. If theengine stops,
the interlocksystem isoperating correctly. Correctprob-
lem if not operating properly.
5. Sitontheseat and startengine.Move functionalcon-
trol lever to TRANSPORT. Raise off the seat. If the en-
gine stops, the interlock system is operating correctly.
Correct problem if not operating properly.
6. Sit on the seat, engage parking brake, keep traction
pedal in neutral and place functional control lever in
NEUTRAL. Start the engine. Move joystick forward to
lower the cutting units. If the units do not start rotating,
the interlocksystem isoperating correctly. Correctprob-
lem if not operating properly.