Yanmar 4JH4E - Fuel Injection Pump Service Data

6. Fuel Injection equipment
216
6.1.2 Fuel injection pump service data
(1) 3JH4E service date
Part code (Back No.)
- 729271-51450 (TM02)
Adjustment SPEC
- ENG SPEC SERVICE STD
Item
Fuel valve (Valve pressure)
- VBG (220) (170)
Nozzle type (ID mark)
- 159P185VAD1 DN-12SD12
Fuel injection pipe
mm Ø 1.6 x 360 Ø2 x 600
Injection
adjustment
Starting
Pump speed Ns
min
-1
200 200
Average injection
volume Qs
mm
3
/st
45 ± 5.0
50 ± 5.0
Rated load
Pump speed No
min
-1
1500 1500
Injection volume Qo
mm
3
/st
32.5 ± 0.75 56.5 ± 0.75
Nonunifomity % ± 3 ± 3
Tor qu e r is e
Pump speed N
T
min
-1
--
Injection volume Q
T
mm
3
/st
--
Nonunifomity % - -
Hi-idle
Pump speed N
Hi
min
-1
1660
+15
-10
1660
+15
-10
Injection volume Q
Hi
mm
3
/st
6 - 7 18 - 19
Idle
Pump speed Ni
min
-1
400 400
Qi
mm
3
/st
6 - 7 7 - 8
Nonunifomity % ± 15 ± 15
Plunger stroke
mm 8.0
Plunger dia.
mm 8
Suction volume of delivery valve
mm
3
36
Pre-stroke
mm 3.0
Top clearance
mm 0.5
Governor spring Spring constant N/cm
(kgf/cm)
2.76 (0.281)
Free length
mm 41