Troy-Bilt 12087 - 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 and
cannot stop forward motion hy
moving the Wheels/Tines/PTO
Drive Lever into NEUTRAL.
Simply, it is an electrical
grounding system that connects the
two Forward Interlock Levers on
the handlebars to the engine’s igni­
tion system. Either one (or both)
of the Forward Interlock Levers
must be kept squeezed against the
handlebar grip(s) whenever the
Wheels/ Tines/ PTO Drive Lever is
engaged in FORWARD.
If you release both the Forward
Interlock Lever(s) before first
moving the Wheels/Tines/PTO
Drive Lever to NEUTRAL, the in­
terlock system will ground out the
engine’s ignition system and stop
the engine. (The interlock system
also prevents the engine from start­
ing 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.
A DANGER
The Forward Interlock Safety
System is designed for the
operator’s satety. 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 Satety
System is functioning prop­
erly. Always test the system
before using the tiller or PTO
power unit.
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 holdjust 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
assembly.
Photo 4-3: Squeeze one Forward Interlock Lever and
then move Wheels/Tines/PTO Drive Lever down to FOR­
WARD.
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