Required Epa / Arb Maintenance - Usa Only; Epa / Arb Installation Requirements - Usa Only; Tightening Fasteners; Standard Torque Chart - Yanmar 2TNV70 Operation Manual

PERIODIC MAINTENANCE
Required EPA / ARB Maintenance -
USA Only
To maintain optimum engine performance and
compliance with the Environmental Protection
Agency (EPA) Regulations Non-road Engines
and the California Air Resources Board (ARB,
California), it is essential that you follow the
Periodic Maintenance Schedule on page 73 and
Periodic Maintenance Procedures which start on
page 75.
EPA / ARB Installation
Requirements - USA Only
The following are the installation requirements for
the EPA / ARB. Unless these requirements are
met, the exhaust gas emissions will not be within
the limits specified by the EPA and ARB.
Maximum Exhaust Gas Restriction shall be:
• 2TNV70: 0.85 psi (5.88 kPa; 600
mm Aq) or less
• 3TNV70 and 3TNV76: 1.70 psi
(11.76 kPa; 1200 mm Aq) or less

STANDARD TORQUE CHART

Thread size × Pitch mm
Tightening Torque
72
M6×1.0 M8×1.25
in lbs 96.0 ± 9.0
ft lbs - 19.0 ± 2.0
N·m 10.8 ± 1.0 25.5 ± 2.9
kgf·m 1.1 ± 0.1 2.6 ± 0.3
• 3TNV84T and 4TNV84T: 0.85 psi
(5.88 kPa; 600 mm Aq) or Iess
• 4TNV98T: 1.71 psi (11.77 kPa;
1200 mm Aq) or Iess
• 3TNV82A, 3TNV84, 3TNV88,
4TNV94, 4TNV88, 4TNV94L, and
4TNV98: 2.22 psi (15.3 kPa; 1560
mm Aq) or Iess
Maximum air intake restriction shall be 0.90 psi
(6.23kPa; 635mm Aq) or less. Clean or replace
the air cleaner element if the air intake restriction
exceeds the above mentioned value.

Tightening Fasteners

Use the correct amount of torque when you
tighten fasteners on the machine. Applying
excessive torque may damage the fastener or
component and not enough torque may cause a
leak or component failure.
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.
M10×1.5 M12×1.75
- -
36.0 ± 4.0 65.0 ± 7.0
49.0 ± 4.9 88.3 ± 9.8
5.0 ± 0.5 9.0 ± 1.0
TNV Operation Manual
CAUTION
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M14×1.5
- -
101.0 ± 7.0
137.0 ± 9.8
14.0 ± 1.5
M16×1.5
-
167.0 ± 7.0
226.0 ± 9.8
23.0 ± 2.0