Yanmar 2TNV70, Operation Manual

Page: 88 / 142

PERIODIC MAINTENANCE
70
TNV Operation Manual
CAUTION
0000017en
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.
CAUTION
0000024enTNVIDI-DIOM
Establish a periodic maintenance plan
according to the engine application and
make sure you perform the required
periodic maintenance at intervals
indicated. Failure to follow these
guidelines will impair the engine’s safety
and performance characteristics,
shorten the engine’s life and may affect
the warranty coverage on your engine.
See Yanmar Limited Warranty on page v .
Consult your authorized Yanmar
industrial engine dealer or distributor for
assistance when checking items marked
with a
z .
CAUTION
0000025enTNVIDI-DI
If no water drips when the fuel
filter / water separator drain cock
is opened, loosen the air vent
screw on the top of the fuel filter / water
separator by using a screwdriver to turn
it counterclockwise 2-3 turns.
This may occur if the fuel filter / water
separator is positioned higher than the
fuel level in the fuel tank. After draining
the fuel filter / water separator, be sure
to tighten the air vent screw.
CAUTION
0000026en
• When the engine is operated in dusty
conditions, clean the air cleaner
element more frequently.
• NEVER operate the engine with the air
cleaner or element(s) removed. This
may cause foreign material to enter the
engine and damage it.
CAUTION
0000046en
The maximum air intake restriction shall
be 0.90 psi (6.23 kPa; 635 mm Aq) or
less. Clean or replace the air cleaner
element if the air intake restriction
exceeds the above mentioned value.
CAUTION
0000023enTNVIDI-DIOM
The tightening torque in the Standard
Torque Chart
(page 72) should be
applied only to the bolts with a “7” head.
(JIS strength classification: 7T)
• Apply 60% torque to
bolts that are not listed.
• Apply 80% torque when
tightened to aluminum alloy.
CAUTION
0000060enTNVIDI-DIOM
Make it a habit to perform daily checks.
See Daily Checks on page 44.
Periodic maintenance prevents
unexpected downtime, reduces the
number of accidents due to poor
machine performance and helps extend
the life of the engine.