Fuel system
73
Checking feed pressure
The pressure is measured after the fuel has passed
the filter cartridge.
When checking, engine speed is first increased, after
which the speed is reduced so that the pressure can
be read off at low idling speed. The feed pressure
must not be less than 280 kPa (40.6 psi) for D5/D7 &
D6, 300 kPa for D9/D and 00 kPa (4.5 psi) for
all other engines.
Low feed pressure may be the result of a blocked
filter, defective overflow valve or defective feed pump.
Ensure that the components follow recommendations
and do not cause the excessive pressure level.
NOTE! The overflow valve must not be adjusted. Re-
place the valve if necessary.
9998339
9998494
Measure the feed pressure at the fuel inlet hollow
screw on the front of the engine block (P), by using
manometer
999 6398 with nipple 999 6066 and a
long hollow screw (44 mm) with a new copper wash-
er (9690).
NOTE! The feed pressure shold be min 280 kPa
(40.6 psi)
P
D5/D7:
D9/D11/D12/D16:
The hose and nipple
999 4894 and the manometer
999 8339 are connected to the air vent outlet on the
filter cover.
NOTE! Single filter not available for D6.
IMPORTANT! Shut-off valves should be fitted
on the fuel and return line, if the fuel tank maxi-
mum level is higher than the cylinder head of
the engine.
The valves should be shut off during permanent
engine stop. There is otherwise a risk that fuel
may leak through the injection pump/ injectors
to the lubricating system.
Air vent outlet
Air vent outlet
Air vent
outlet
9998339
9998494
Summary of Contents for D11 series
Page 1: ...Marine Propulsion Diesel Engines Installation 1 1 D E D5 D16 series ...
Page 2: ......
Page 208: ...206 References to Service Bulletins Group No Date Concerns ...
Page 209: ...207 Notes ...
Page 210: ...208 Notes ...
Page 212: ...7748655 English 11 2007 ...