Hatz Diesel 4H50TIC, Workshop Manual

Page: 83 / 129

3
3 - 4H50 / 07.2015
M 14 Injection system
Fuel return line:
max.
n
umber of plug assemb
ly/remo
v
al (plugging in;
loc
king;
unloc
king;
remo
ving the plug from the counter piece):
10x
If dur
ing the remo
v
al of the plug connectors the O-r
ing on them is damaged, then the entire retur
n line m
ust be replaced.
Bef
ore re-mounting of the plug connectors
, it m
ust be ensured that the counter pieces are not soiled or corroded.
Hose-nozzle connections ma
y not be loosened.
The mounting of the fuel retur
n line on the v
ehicle lo
w-pressure circuit and on the injector m
ust be
done dr
y (without mounting aids).The mounting of the retur
n line on the engine is done b
y hand.
Mounting:
Plug retur
n plug on injector retur
n connection (until contact of the contact surf
ace is on the injector (picture 1).
Then close the loc
king bar (bar m
ust snap into the closed position and be e
v
en with mounting surf
aces)(picture 2).
In order to guar
antee the function, the retur
n plugs m
ust be mounted according to the mounting instr
uctions abo
v
e
.
Otherwise fuel can escape!
Dismounting:
Dismounting m
ust be done b
y hand.
Open saf
ety bar
. Meanwhile
, press on mounting surf
ace in plug direction (saf
ety bar m
ust snap into open position (picture 3).
Then remo
v
e retur
n
plug from injector retur
n connection (picture 4).
Picture 1
picture 2
picture 3
picture 4
Contact surf
ace
Mounting surf
aces
Saf
ety bar