Walker MDD (20.9 HP) - Manual (Page 35)

Operating Instructions
31
Light Switch (For Optional Lights)
Operates headlights (when installed).
Hourmeter
The hourmeter displays operating time accumu-
lated while the ignition switch is in the ON position.
Circuit Breakers
Two manual reset circuit breakers are located on the
instrument panel. Each has a button that pops out if
the circuit breaker trips. The 10 amp circuit breaker
protects the circuits to the headlights, fuel valve so-
lenoid, safety switch relays and time delay module,
and GHS. The 7 amp circuit breaker protects the in-
strument panel circuits to the meters, warning lights,
and warning horn.
Warning Horn
The warning horn sounds to alert the operator that
an unsafe engine condition is being indicated -
when engine coolant temperature is too high or
engine oil pressure is too low. If the horn sounds,
check the indicator lights and water temperature
gauge and correct the problem before further
operation.
STARTING THE ENGINE
1. Before attempting to start the engine, make
sure the operator is in the seat, the Forward
Speed Control is in NEUTRAL-PARK position,
and the blade clutch and parking brake are
DISENGAGED.
NOTE: Release parking brake to prevent extra
load on the starter if the transmission neutral is
slightly out of adjustment.
NOTE: For starting in cold weather [below 40°
F (4° C)], use the cold start lever to release the
jackshaft drive belt and remove the hydrostatic
transmission from the starter cranking load.
After the engine has been started and warmed
up, raise the lever to re-engage the jackshaft
drive belt.
Jackshaft Drive Belt Release
2. Turn and hold the ignition key in the PREHEAT
position to preheat the engine glow plugs. For
temperatures below 35° F (2° C), the time
required is approximately 25 to 30 seconds. For
temperatures 35° F (2° C) or higher, the time
required is approximately 10 to 15 seconds.
CAUTION
Before operating the mower, read and un-
derstand all
Safety Instructions and Operat-
ing Instructions .
WARNING
NEVER run the engine in an enclosed or
poorly ventilated area. Engine exhaust
contains carbon monoxide, an odorless
and deadly gas.
CAUTION
A safety interlock switch system PRE-
VENTS CRANKING the engine with either
the Forward Speed Control or the blade
clutch (PTO) out of neutral. If the engine
cranks otherwise, the safety system is not
working and should be repaired or ad-
justed before operating the mower. DO
NOT disconnect safety switches; they are
for the operator’s protection.
Cold Start
Lever Engaged