Exhaust Gas Emission Standard (Epa/Arb); Guarantee Conditions For Emission Standard (Epa/Arb) - Yanmar 3YM30 Sevice Manual

1.General

1.6.2 Exhaust gas emission standard (EPA/ARB)

Engine Power
8 <= kW < 19 Tier 1
(11 <= hp < 25)
Tier 2
19<= kW < 37 Tier 1
(25 <= hp < 50)
Tier 2
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
kPa (mmAq)
Permissible
3.9 (400)
(b) Exhaust gas back pressure
kPa (mmAq)
Permissible
14.7 (1500)
(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.
Power Rating
kW < 19
19 kW < 37
Tier Model Year
2000
2005
1999
2004
Parts
Fuel nozzle cleaning
Every 1500 hours
Every 1500 hours
NOx HC NMHC + NOx
- -
- -
- -
- -
Maintenance period
Adjustment, cleaning, repairs for fuel
nozzle, fuel pump, and electronic control
unit etc.
13
CO
9.5 (7.1) 6.6 (4.9)
7.5 (5.6) 6.6 (4.9)
9.5 (7.1) 5.5 (4.1)
7.5 (5.6) 5.5 (4.1)
Every 3000 hours
Every 3000 hours
PM
0.80 (0.60)
0.80 (0.60)
0.80 (0.60)
0.60 (0.45)