PERIODIC MAINTENANCE
TNV IDI Service Manual
5-15
Periodic Maintenance Procedures
Change the engine oil every 250 hours of operation
after the initial change at 50 hours. Replace the
engine oil filter at the same time.
Engine Oil and Engine Oil Filter on page 5-7.
Check and Clean Radiator Fins
CAUTION
FLYING OBJECT HAZARD!
• ALWAYS wear eye protection
when servicing the engine and
when using compressed air or
high-pressure water. Dust, flying
debris, compressed air,
pressurized water or steam may
injure your eyes.
• Failure to comply may result in minor or
moderate injury.
Dirt and dust adhering to the radiator fins reduce
the cooling performance, causing overheating.
Make it a rule to check the radiator fins daily and
clean as needed.
Note that a typical radiator is shown in
Figure 5-10
for illustrative purposes only.
• Blow off dirt and dust from fins and radiator with
28 psi (0.19 MPa; 2 kgf/cm
2
) or less of
compressed air
(Figure 5-10, (1))
. Be careful not
to damage the fins with the compressed air.
• If there is a large amount of contamination on the
fins, apply detergent, thoroughly clean and rinse
with tap water.
NOTICE
NEVER use high-pressure water or compressed air
at greater than 28 psi (193 kPa; 19 686 mmAq) or a
wire brush to clean the radiator fins. Radiator fins
damage easily.
Figure 5-10
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
Check and Adjust the Governor Lever
and Engine Speed Control
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 authorized Yanmar industrial engine dealer or
distributor.
1. Check that the governor lever
(Figure 5-11, (1))
makes firm contact with the high idle stop
(Figure 5-11, (2))
and the low idle speed limit
screw
(Figure 5-11, (3))
when the engine
speed control is in the full speed or low idle
speed positions.
FULL
LOW
00000
8
5A
(1)
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