Yanmar 3JH4E Service Manual page 105

(22) Mounting the fuel injection pump
1) Lightly fit the fuel injection pump on the gear case
flange. (After adjusting injection timing, tighten the
fuel injection pump).
NOTE:
Be careful not to scratch the O-ring between the
fuel injection pump and gear case flange.
2) Fit the fuel injection pump drive gear to the fuel
pump camshaft.
3) Align the "B" match marks on the fuel injection
pump drive gear and idle gear.
4) Tighten the pump drive gear nut fastening the fuel
pump gear and camshaft to the specified torque.
(Do not apply lube oil to the nut.)
Tightening torque
Pump drive gear nut
5) Measure the backlash of the fuel injection pump drive gear.
Backlash
Fuel injection pump drive gear
(23) Mounting the fuel injection nozzle
1) Replace the used fuel nozzle protector and fuel
nozzle seat with new ones. Put the seat in the
cylinder head and the protector to the nozzle tip.
Mount the fuel injection nozzle to the cylinder
head.
2) Tighten the fuel nozzle retainer bolt to the specified
torque. (Do not apply lube oil to the bolt.)
Tightening torque
Fuel nozzle retainer bolt
(24) Mounting the fresh water pump
1) Thoroughly coat both sides of the gasket with
adhesive.
2) Replace the O-ring for the connecting part of the
pump, which is inserted in the cylinder block, and
tighten the fresh water pump to the specified
torque.
Tightening torque
Fresh water pump
N•m (kgf•m)
78.2-98.2 (7.97-10.0)
mm
0.07-0.15
N•m (kgf•m)
24.4-28.4 (2.49-2.90)
N•m (kgf•m)
6.9-11 (0.7-1.1)
89
4. Disassembly and Reassembly
Fuel injection pump
drive gear
B
B
C
A
Idle gear
Direction of rotation
(Gear train)
Bolt
Washer
Fuel nozzle
retainer
Cylinder head
(Fuel injection nozzle)
Cylinder head
Gasket
O-ring
Camshaft gear
C
Seawater pump
gear
Crankshaft gear
Fuel injection nozzle
Fuel nozzle protector
Fuel injection seat
Fresh water
pump