MTU 12 V 4000 M23F Operating Instructions Manual page 27

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).
If leakage in the area of the thrust ring (8) or the HP line (2) occurs, the emerging fuel is routed to 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
MS150068/01E 2014-01 | Product Summary | 27
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