Starting The Engine; Safety Interlock System - Troy-Bilt Bronco 46T Operator's Manual

Front engine lawn tractor

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Table of Contents

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J. Park Brake or Park Brake/CVT Drive

Control Lever

The Park Brake or Park Brake/CVT Drive Control Lever is used

to engage the parking brake and set the drive speed of CVT

models. Refer to the Driving the Tractor section of this manual for

detailed instructions regarding the parking brake.

NOTE:

The parking brake must be set if the operator leaves the

seat with the engine running or the engine will automatically

shut off.

K. Cup Holder

The cup holder is located to the left of the operator's seat.

Headlights (Not Shown)

On some tractors the lights are ON whenever the ignition key is

rotated out of the STOP position. The lights turn OFF when the

ignition key is moved to the STOP position.

On some tractors the lights are ON only while the engine is

running. Turning the tractor OFF will turn the lights OFF.

The headlights may flicker briefly as the tractor is turned OFF.

Operation

BEFORE OPERATING YOUR TRACTOR

• Before operation, refer to the Maintenance Schedule chart

located in this manual for regularly scheduled service items.

• This engine is certified to operate only on clean, fresh,

unleaded gasoline. Fill only with clean, fresh, unleaded

gasoline with a pump sticker octane rating of 87 or higher.

• Do not use gasoline left over from the previous season, to

minimize gum deposits in the fuel system.

• Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by

volume) is an approved fuel. Other gasoline/alcohol blends

are not approved.

• Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline

blends (up to a maximum of 15% MTBE by volume)

are approved fuels. Other gasoline/ether blends are

not approved.

Safety Interlock System

Do NOT operate the tractor if the safety interlock system

is malfunctioning. This system was designed for your

safety and protection.

This tractor is equipped with a safety interlock system for the

protection of the operator. If the safety interlock system should

ever malfunction, do NOT operate the tractor. Contact an

authorized service dealer.

OPERATION

WARNING

• The safety interlock system prevents the engine from

cranking or starting unless the parking brake is engaged

or the operator is in the seat and the brake pedal is fully

depressed, with the PTO (Blade Engage) Lever in the

disengaged (OFF) position.

• The engine will automatically shut OFF if the operator leaves

the seat before engaging the parking brake.

• The engine will automatically shut OFF if the operator leaves

the tractor's seat with the PTO (Blade Engage) Lever in the

ENGAGED (ON) position, regardless of whether the parking

brake is engaged.

• With the ignition key in the NORMAL DRIVING MODE position,

the engine will automatically shut OFF if the PTO (Blade

Engage) Lever is moved into the engaged (ON) position with

the speed control in REVERSE (R) position.

CHECKING THE SAFETY INTERLOCK CIRCUITS

Periodically check the safety interlock circuits to ensure they are

working properly. If a safety circuit is not working as designed,

contact your authorized service dealer to have the tractor

inspected. Do NOT operate the tractor if any safety circuit is

not functioning properly. To check the safety circuits, proceed

as follows:

1. With the engine off and sitting in the seat, place the

PTO (Blade Engage) Lever in the ENGAGED (ON) position.

Momentarily turn the ignition switch to the START position;

the engine should not crank.

2. With the tractor running, and the parking brake not engaged;

lift upward from the operator's seat. The engine should stop.

3. With the parking brake engaged, engage the PTO. Lift

upward from the operator's seat; the engine should stop.