Yanmar 3TNV82A-B, Service Manual

Page: 183 / 394

ENGINE
TNV DI Service Manual 6-51
4-Valve Cylinder Head
3. Disconnect the fuel return hose
(Figure 6-40, (2)) from the cylinder head.
4. Disconnect the hoses (Figure 6-40, (3)) from
the cold start device on the fuel injection pump.
This cooling water pipe is not used in
electronically controlled engines 4TNV84T-Z,
4TNV98-Z, 4TNV98-E and 4TNV98T-Z.
Instead, these engines use a solenoid valve
and connecting coupler but, when removing the
cylinder head only, it is not necessary to remove
the connecting coupler.
5. Remove the turbocharger-to-intake manifold
hose (Figure 6-41, (1)) (if equipped).
6. Disconnect the electrical wire from the intake air
heater (Figure 6-41, (12)).
7. Remove the intake manifold bolts
(Figure 6-41, (11)). Remove the intake
manifold (Figure 6-41, (10)). Discard the intake
manifold gasket (Figure 6-41, (9)).
8. Disconnect the turbocharger oil supply
(Figure 6-41, (2)) and the return lines
(Figure 6-41, (4)) (if equipped).
9. Remove the exhaust manifold bolts
(Figure 6-41, (7)). Remove the exhaust
manifold (Figure 6-41, (6)) with the
turbocharger attached. Discard the exhaust
manifold gasket. (Figure 6-41, (5)).
Figure 6-41
10. Remove the engine coolant pump. See
Disassembly of Engine Coolant Pump on
page 8-10.
CAUTION
Remove or install the high-pressure fuel
injection lines as an assembly whenever
possible. Disassembling the
high-pressure fuel injection lines from
the retainers or bending any of the fuel
lines will make it difficult to reinstall the
fuel lines.
0000047en
0001860
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9) (10)
(11)
(12)
TNV_DI_SM_A4.book 51 ページ ２００７年１２月６日 木曜日 午前９時２３分