Parking Brake Switch; Purpose; Location; How It Works - Toro titan zx Service Manual

Parking Brake Switch

Purpose

The Parking Brake Switch is part of the safety interlock
system.
The parking brake switch circuit can:
• Prevent the engine from cranking if parking brake
is not engaged.
• Prevent the engine from cranking if a control
handle is not in the neutral position.
• Turn the engine OFF if a control handle is moved
out of neutral with the brake engaged.

Location

The Parking Brake Switch is located in the control box
assembly, near the parking brake lever. Remove LH
control cover (A) for better access (Fig. 122 and
Fig. 123).
Fig. 122
Toro TITAN 2014 Service Manual
A

How it Works

This double pole plunger type switch has four terminals.
For engine START, it is used to ensure the park brake
is in the ON position. At the same time it allows battery
voltage to flow through the safety circuit.
When the park brake is released, it bypasses both the
neutral switches, as long as the operator is sitting in the
seat to maintain current for the safety circuit.
Park Brake ON:
• Normally Open contacts are closed – Battery
voltage to kill relay coil and fuel solenoid, through
PICT-3033
motion control neutral switches.
• Operator must be in seat.
Park Brake OFF (engine running):
• Normally closed contacts are closed – Battery
voltage directly to kill relay coil and fuel solenoid,
neutral switches NOT in circuit.
• Operator must be in seat.
ELECTRICAL
Fig. 123 PICT-2010
7
7-7