Safety Interlock System - Scag Power Equipment STT Operator's Manual

Section 4
5. Ammeter (Figure 4-1). Indicates the condition of
the charging system. When the engine is running the
needle should be toward the positive end of the
meter. If the needle is toward the negative end of
the meter, this indicates a discharge condition and
the machine should be taken in for service.
6. Hourmeter (Figure 4-1). Indicates the number of
hours the engine has been operated. It operates
whenever the ignition key switch is in the ON
position. It can be used to keep track of
maintenance intervals and the amount of time
required to perform various tasks.
7. Fuse Holders (Figure 4-1). Two 20-amp fuses
protect the mower's electrical system. To replace
fuses, pull fuse out of the socket and install a new
fuse.
8. Left Steering Control (Figure 4-1). Used to
control the mower's left wheel when traveling
forward or reverse.
9. Right Steering Control (Figure 4-1). Used to
control the mower's right wheel when traveling
forward or reverse.
10. Parking Brake Control (Figure 4-1). Used to
engage and disengage the parking brakes. Pull the
lever back to engage the parking brakes. Push the
lever forward to disengage the parking brakes.
11. Fuel Tank Gauge (Figure 4-1). Indicates the
amount of fuel in the fuel tank.
12. Dump Valve Control Levers (Figure 4-2).
Located on the hydraulic pumps, used to "free-
wheel" the mower. Rotating the valves clockwise
until they stop allows the unit to move under
hydraulic power. The valves must be in this position
and torqued to 10ft/lbs during operation of the
mower. Rotating the valves counter-clockwise
allows the mower to be moved by hand (free-
wheeling).
13. Deck Lift Foot Lever (Figure 4-1). Used to raise
and lower the cutter deck.
14. Cutting Height Adjustment (Figure 4-1). Used to
set the cutter deck at the desired cutting height.
DUMP VALVE
CONTROL
Figure 4-2 Dump Valve Control
15. Deck Release Lever (Figure 4-1). Used to lock
the cutter deck in the transport position. Push the
foot pedal forward and lift up on the release lever to
release the cutter deck for normal mowing.
16. Temperature Gauge (Figure 4-1). Indicates the
operating temperature of the engine. Used on
mowers with the Kawasaki liquid cooled engine
only.
17. Check Engine Light (Figure 4-1). Indicates the
operation of the engine sensors on the Kawasaki
Digital Fuel Injection (DFI). Light will flash once at
initial start up. If problem occurs with a sensor on the
engine, the light will flash a code. See your
authorized Scag Dealer for diagnosis and repair.

4.2 SAFETY INTERLOCK SYSTEM

The mower is equipped with a safety interlock system
that prevents the engine from starting unless the deck
drive is disengaged, the parking brake is engaged, the
steering control levers are in the neutral position and the
operator is in the seat. The interlock system shuts off
the engine if the operator leaves the seat with the steering
control levers not in the neutral position and/or the cutter
blades engaged and the parking brake not engaged.
WARNING:
Never operate the mower with the interlock
system disconnected or malfunctioning. Do not
disengage or bypass any switch; injury to
yourself and others or property damage could
result.
11
390S141-1