Safety Interlock System. Simplicity 1693689, 1694088, ZT Series

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Features & Controls

E. Parking Brake Knob

The parking brake is applied by fully depressing the clutch/brake pedal and then pulling UP on the parking brake knob. To release the parking brake, fully depress the clutch/brake pedal, and push the knob DOWN.

F. Clutch/Brake Pedal

Depressing the clutch/brake pedal disengages the transmissions and applies the brake.

G. PTO (Power Take Off) Switch

The PTO switch engages and disengages the mower.

Pull OUT on the switch to engage, and push IN to disengage.

H. Mower Height Adjuster

This controls the cutting height of the mower deck.

Later 14HP & 16HP Models: Pull back on the lift lever and depress release button. Move the lever to the desired height and release the lever.

Early 14HP & 16HP Models: Move this lever to the

LEFT and then into the desired cutting height position.

Moving the lever FORWARD decreases the cutting height, and BACK increases the cutting height.

18HP Models: Turn the knob clockwise to raise the cutting height and counter clockwise to lower it.

I & J. Throttle / Choke Control

14HP & 16HP Models have a combined throttle / choke control (I, see Figure 1). Moving the throttle / choke control fully forward chokes the engine for cold starts. (A warm engine may not require choking.) The first “notch” position back from choke position is FULL throttle.

Always operate the unit at FULL throttle.

18HP Models have separate throttle and choke controls

(I & J, see Figure 2). Pulling the round choke control knob (J) out fully chokes the engine for cold starts. (A warm engine may not require choking.) Moving the throttle control (I) fully forward is FULL throttle position.

Always operate the unit at FULL throttle.

K. Headlight Switch

18HP Models Only: Turn the switch ON to light the front headlight.

SAFETY

INTERLOCK SYSTEM

This unit is equipped with safety interlock switches and other safety devices. These safety systems are present for your safety, do not attempt to bypass safety switches, and never tamper with safety devices. Check their operation regularly.

Operational SAFETY Checks

Your unit is equipped with a seat switch safety system. Check the seat switch operation every fall and spring with the following tests.

Test 1 — Engine should NOT crank if any of the following conditions exist:

• PTO switch is engaged (ON), OR

• Clutch/brake pedal is NOT fully depressed.

Test 2 — Engine SHOULD crank if ALL of the following conditions are met:

• PTO switch is NOT engaged, AND

• Clutch/brake pedal IS fully depressed.

Test 3 — Engine should SHUT OFF if any of the following conditions exist:

• Operator rises off seat with transmission control levers out of the neutral gate AND clutch/brake pedal NOT depressed, OR

• Operator rises off seat with clutch/brake pedal

NOT fully depressed, OR

• Operator rises off seat with PTO engaged.

Test 4 — Blade Brake Check

Mower blades and mower drive belt should come to a complete stop within five seconds after electric

PTO switch is turned off (or operator rises off seat).

If mower drive belt does not stop within five seconds, see your dealer.

NOTE: Once the engine has stopped, PTO switch must be turned off after operator returns to the seat in order to start the engine.

WARNING

If the unit does not pass a safety test, do not operate it. See your authorized dealer. Under no circumstance should you attempt to defeat the purpose of the safety interlock system.

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