Yanmar 2YM15 - Fuel Injection Pump Service Data and Adjustment

6. Fuel injection equipment
135R1
6.1.2 Fuel injection pump service data and adjustment
(1) Service data
1) Service data for 3YM30
Note : The value in parentheses is a reference value.
Part code (Back No.) - 728990-51350 (TMR1)
Adjustment SPEC - ENGINE SPEC SERVICE STD
Item
Fuel valve (Valve pressure) - A (120) (170)
Nozzle type (ID mark) - NP-DN0PDN158 DN-12SD12
Fuel injection pipe mm Ø 2 x 320 Ø2 x 600
Injection
adjustment
Starting Pump speed
N
D
min
-1
200 -
Average
injection
volume Q
D
mm
3
/st
38 ± 5-
Rated load Pump speed
N
A
min
-1
1800 -
Injection
volume Q
A
mm
3
/st
22.4 ± 0.75 -
Variation % ± 3-
Torque rise Pump speed
N
C
min
-1
1300 -
Injection
volume Q
C
mm
3
/st
25.9 ± 0.5 -
Variation % ± 5-
Hi-idle Pump speed
N
B
min
-1
1925 -
Injection
volume Q
B
mm
3
/st
(4) -
Idle Pump speed
N
E
min
-1
425 -
Injection
volume Q
E
mm
3
/st
(4) -
Plunger stroke mm 7.0
Plunger diameter mm Ø 6
Retraction volume of delivery valve mm 20.1
Pre-stroke mm 2.9
Top clearance mm 1.4
Governor spring Spring
constant
N/cm
(kgf/cm)
4.23 (0.431)
Free length mm 42