MTU 16V4000M*3 series Operating Instructions Manual page 47

HP connections
1 Jacket pipe
2 HP fuel line
3 O-ring
4 Union nut
5 Recess for O-ring
6 Thrust ring
7 Leakage overflow bore
The HP fuel line is sealed by the thrust ring (8).
In case of leakage around the thrust ring (8) or the HP line (5) fuel escapes into the leakage chamber.
The leaking fuel is drained off without pressure via the leakage overflow-bore (7). The leakage chamber is
sealed toward the outside by the O-rings (3).
This prevents leakage egress.
The union is confirmed as being SOLAS-compliant by DnV and GL.
8 Thrust ring
9 Union nut
10 Union nut
11 Connecting piece
12 Snap ring
13 Thrust ring
14 Shim washers
MS15035/00E 2018-08 | General Information | 45
15 Union nut
16 Thrust ring
17 HP line outer pipe
18 Internal pipe of HP line
19 Ball-type seal area
20 Leak-fuel connection