PERIODIC MAINTENANCE
77
NOTICE
Never use high-pressure water or compressed air
at greater than 28 PSI (193 kPa; 19686 mmAq) or a
wire brush to clean the radiator fins. Radiator fins
damage easily.
■
Check and adjust cooling fan V-belt
Check and adjust the cooling fan V-belt every 250
hours of operation after the initial 50 hour V-belt
maintenance. See Check and adjust cooling fan
V-belt on page 69.
■
Check and adjust the governor lever and
engine speed control (except electronically
controlled engines)
The governor lever and engine speed control
(throttle lever, accelerator pedal etc.), are
connected together by a cable or linkage. If the
cable becomes stretched, or the linkage wears or
loosens, the governor lever may not respond to a
change in the position of the engine speed control.
NOTICE
Never attempt to adjust the low or high idle speed
limit screw. This may impair the safety and
performance of the machine and shorten its life. If
the idle speed limit screws require adjustment, see
your Isuzu Distributor.
1. Check that the governor lever (Figure 12, (1))
makes firm contact with the high idle stop
(Figure 12, (2)) and the low idle speed limit
screw (Figure 12, (3)) when the engine speed
control is in the full speed or low idle speed
positions.
2. If the governor lever does not make proper
contact with the high idle stop or the low idle
speed limit screw, adjust the throttle cable or
linkage as necessary.
Note: Do not force the throttle cable or linkage
to move. This may damage the the
governor lever, the throttle cable or
linkage and cause irregular operation of
the engine speed control.
NOTICE
The engine speed control (throttle lever,
accelerator pedal etc.), should be equipped with
stops to prevent the application of excessive
pressure by the governor lever to either the high
idle stop or low idle speed limit screw.
See your Isuzu Distributor for the adjustment
procedures for your specific engine or machine.
Figure 12
2
3
1
K0000654B01
TNV_OperationManual_T4(under 19kW).book Page 77 Wednesday, June 17, 2015 11:23 AM
