Yanmar 3TNV Series, Service Manual

Page: 100 / 213

4. Disassembly, Inspection and Reassembly of Engines
85
Point3: (Refer to 7.2.5 in chapter 7)
[Disassemble]
Remove the mounting nut of the fuel injection
pump drive gear, remove the gear using the gear
puller, and remove the fuel injection pump. Do
not forget to remove the stay on the rear side.
When extracting the gear using the gear puller,
use a pad at the shaft and carefully operate so as
not to damage the thread.
[Reassemble]
Tightening torque for fuel pump drive gear nut
(without lube. Oil)
N m(kgf-m)
Model Tightening torque
TNV82A 88 78 88 (8.0 9.0)
4TNV94L/98/106(T) 113 123 (11.5 12.5)
Point4
[Reassemble]
Assemble crankshaft gear A, fuel injection pump
drive gear B and camshaft gear C at the same
time by aligning with idle gear A, B and C marks.
Install the idle gear shaft with the oil hole facing
upward.
Point5
[Reassemble]
Install the PTO drive gear with its inner spline side
facing the flywheel.
Point6
[Disassemble]
Install a bolt as a handle in the hole at the end
face of the flywheel and remove carefully so as
not to damage the ring gear.
[Reassemble]
Flywheel mounting bolt : apply lube oil
N m(kgf-m)
Model Tightening torque
3TNV82A 88 83.3 88.2 (8.5 9.0)
4TNV94L/98/106(T) 186.2 205.8 (19.0 21.0)
Point7
[Disassemble]
Measure the camshaft side gap.
mm
Item Standard Limit
Side gap 0.05 0.20 0.30
If the measured side gap exceeds the limit,
replace the thrust metal.