Troy-Bilt 12069-7HP - Manual (Page 26)

Test Operation of Forward
Interlock Safety System
The Forward Interlock Safety
System is designed to shut the
tiller engine off immediately if
you loose control of the tiller or
become separated from it.
Simply, it is an electrical ground­
ing system that connects the two
Forward Interlock Levers on the
handlebars to the engine’s ignition
system. Either one (or both) of the
Forward Interlock Levers must be
kept squeezed against the handle­
bar grip(s) whenever the Wheels/
Tines/ PTO Drive Lever is en­
gaged in FORWARD. If you re­
lease both the Forward Interlock
Lever(s) before first moving the
Wheels/Tines/PTO Drive Lever to
NEUTRAL, the interlock system
will ground out the engine’s igni­
tion system and stop the engine.
(The interlock system also prevents
the engine from-starting if the
Wheels/ Tines/PTO Drive Lever is
engaged in FORWARD.)
This system has an electro-me­
chanical design, and so is subject to
normal wear and possible malfunc­
tion. As such, it must be checked for
proper operation before you use the
tiller or PTO power unit each time.
How to Check the Interlock System:
1. Move tiller outside on level
ground. Remove any obstacles.
2. Check that the Forward Interlock
wire harness plug at the bottom of
the handlebars is firmly connected to
the receptacle on the top, right side
of the transmission. See Photo 4-2.
Photo 4-2: Plug and receptacle of
Forward Interlock Safety System
must be securely connected.
3. Move Wheel Speed Lever to
SLOW position and move Tines/
PTO Clutch Lever to DISENGAGE.
4. Start engine as described later in
this section. Set engine throttle lever
to SLOW, and let engine warm up.
5. Squeeze and hold just one of the
Forward Interlock Levers against the
handlebar grip while moving the
Wheels/ Tines/ PTO Drive Lever
down to FORWARD. (See Photo
4-3). As the tiller moves forward,
release the Forward Interlock Lever
briefly. The engine should start to
stall out if the interlock system is
working properly. If it does start to
stall, quickly squeeze the lever up
against the handlebar grip, and then
return the Wheels/ Tines/ PTO Drive
Lever to NEUTRAL. Repeat this
test to check that the engine begins
to stall out when the other Forward
Interlock Lever is released.
6. If the engine does not begin to
shut off when either Forward
Interlock lever is released, shut the
engine off, remove the key (if elec­
tric start), and do not operate the
tiller or PTO power unit until the
system has been repaired and is
functioning properly.
IMPORTANT - To avoid possible
damage to the Forward Interlock
Safety system, do not use high-
pressure sprays near the wire har­
ness receptacle or neutral plunger
assemblv.
DANGER
The Forward Interlock Safety
System is designed for the
operator’s safety. Do not dis­
connect or attempt to defeat
the purpose of the system. If
the system malfunctions, im­
mediately contact your local
authorized dealer or the
TROY-BILT Technical Service
Department for assistance.
Do not use the tiller or the
PTO power unit until the
Forward
Interlock Safety
System is functioning prop­
erly. Always test the system
before using the tiller or PTO
power unit.
»
LA
Photo 4-3: Squeeze one Forward Interlock Lever and
then move Wheels/Tines/PTO Drive Lever down to FOR­
WARD.
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