Yanmar 3YM30, Sevice Manual

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1.General
13
1.6.2 Exhaust gas emission standard (EPA/ARB)
Note
1. The transit smoke (ACC/LUG/PEAK) is not applicable.
2. The EPA recommended fuel is used.
3. The ARB emission standard is the same as the EPA's.
4. As for Model year, the year, which a regulation is applicable to, is shown.
1.6.3 Guarantee conditions for emission standard (EPA/ARB)
In addition to making sure that these conditions are met, check for any deterioration that may occur
before the required periodic maintenance times.
(1) Requirement on engine installation condition
(a) Air intake negative pressure
(b) Exhaust gas back pressure
(2) Fuel oil and lubricating oil
(a) Fuel: The diesel fuel oil [BS 2869 A1 or A2 (Cetane No.45 min.)]
(b) Lube oil : API grade, class CD
(3) Do not remove the caps restricting injection quantity and engine speed.
(4) Perform maintenance without fail.
Note: Inspections to be carried out by the user and by the maker are divided and set down in the "List of
Periodic Inspection" on the operation manual and should be checked carefully.
EPA allows to apply the maintenance schedule for the emission related parts as follows.
Engine Power Tier Model Year NOx HC NMHC + NOx CO PM
8 <= kW < 19
(11 <= hp < 25)
Tier 1 2000 - - 9.5 (7.1) 6.6 (4.9) 0.80 (0.60)
Tier 2 2005 - - 7.5 (5.6) 6.6 (4.9) 0.80 (0.60)
19<= kW < 37
(25 <= hp < 50)
Tier 1 1999 - - 9.5 (7.1) 5.5 (4.1) 0.80 (0.60)
Tier 2 2004 - - 7.5 (5.6) 5.5 (4.1) 0.60 (0.45)
kPa (mmAq)
Permissible
¹
3.9 (400)
kPa (mmAq)
Permissible
¹
14.7 (1500)
Maintenance period
Parts
Power Rating
Fuel nozzle cleaning
Adjustment, cleaning, repairs for fuel
nozzle, fuel pump, and electronic control
unit etc.
kW < 19 Every 1500 hours Every 3000 hours
19
¹
kW < 37 Every 1500 hours Every 3000 hours