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Operating Instructions
37
Hourmeter
The hourmeter, which is located on the instrument
panel, displays operating time accumulated while
the ignition switch is in the ON position.
The hourmeter provides maintenance reminders
after certain hours of operation. The hourmeter
screen will start flashing the reminder one hour prior
to the recommended interval and will continue until
one hour after the recommended interval (two
hours). The hourmeter does not have a manual
reset function.
* These intervals reflect the actual time that the
reminder will flash (one hour prior to and one
hour after the recommended interval).
** This reminder is only used one time.
*** In normal operating conditions, oil changes in
100-hour intervals are acceptable. Walker and
the engine manufacturers recommend engine
oil changes every 50 hours in extremely dirty
or dusty conditions or for units with less than
100 hours annual use.
NOTE: The blinking hour glass on the display
means that the meter is operating properly.
Hourmeter
Voltmeter
The voltmeter displays battery and charging system
voltage. An indication of low or high voltage (the red
area) indicates an electrical system failure. The
cause of the failure should be determined and cor-
rected.
Oil Pressure Warning Light
The oil pressure warning light indicates that engine
oil pressure is below the safe operating level [below
3 to 5 PSI (21 to 34 kPa)]. This light (and warning
horn) will come on when the ignition is turned ON, but
should go off after the engine is started. If the light
fails to come on when the ignition switch is turned ON,
it could indicate a burned out bulb. If the light comes
on during engine operation, stop the engine imme-
diately and correct the source of the problem before
further engine operation.
IMPORTANT: Continued operation of the engine
with an illuminated oil pressure warning light MAY
cause severe engine damage (if a low oil pressure
condition exists).
Over Temperature Warning Light
(Model MT and MTEFI Only)
The over temperature warning light indicates that
engine oil temperature and/or cylinder head temper-
ature are above the safe operating limit and the en-
gine is overheating [above 305° F (152° C) oil or
450° F (232° C) cylinder head]. If this light comes
on, there may be a problem with:
Engine cooling system (material packed into cyl-
inder head cooling fins, clogged air intake screen)
Low oil level in crankcase
Stop the engine and correct the source of the prob-
lem before further operation.
IMPORTANT: Continued operation of the engine
with an illuminated over temperature warning light
MAY cause severe engine damage (if a high oil tem-
perature or head temperature condition exists).
Procedure Interval* Reminder
Oil Change
(Break-In)**
4-6 Hours
C
H
G
OIL
Lubricate
and Check
Levels
24-26 Hours LUBE
Oil Change
49-51 Hours***
C
H
G
OIL