HP fuel line and pressure pipe
neck – Replacement
1. Remove leak-off fuel line from cylinder
head.
2. Remove HP fuel line (2).
3. Remove thrust screw (4).
4. Withdraw pressure pipe neck (5).
5. Coat sealing ring of new pressure pipe neck
with grease.
6. Coat sealing cone of pressure pipe neck
with engine oil.
7. Insert pressure pipe neck into cylinder head
until it is in contact with the sealing ring.
8. Fully press in pressure pipe neck by hand.
9. Tighten thrust screw (4) to specified torque
40 Nm ±5 Nm using torque wrench.
10. Coat mating face between union nut and
HP fuel line, ball seal and thread on both
ends of the new HP fuel line (2) with engine
oil.
11. Install new HP fuel line (2).
12. Observe marking on union nut (1).
• Use torque wrench to tighten union
nut (1) with marking “35+3 Nm” to speci‐
fied tightening torque 35 Nm +3 Nm.
• Tighten union nut (1) without marking to
specified torque 30 Nm +5 Nm.
13. Observe marking on union nut (3).
• Use torque wrench to tighten union
nut (3) with marking “35+3 Nm” to speci‐
fied tightening torque 35 Nm +3 Nm.
• Tighten union nut (3) without marking to
specified torque 25 Nm +3 Nm.
14. Install leak-off fuel line on cylinder head.
Final steps
1. Open fuel supply.
2. Vent fuel system (→ Page 56).
MS150094/01E 2012-08 | Task Description | 55
TIM-ID: 0000012538 - 001
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