Operator`s manual

Injection Pump Timing Adjustment (Spill Timing)
If your engine's fuel injection timing is not property adjusted, the engine will not operate property and will be
difficult
to start. Have the injection pump delivery rate checked by a well-established fuel Injection shop. Ad-
just the injection timing as follows:
NOTE: The fuel shut-off lever must be
In the RUN posHion while making the adjustment or no
fuel will flow from the fuel injection pump.
Refer
to the illustration below when servicing the fuel injection pump. First remove the high-pressure fuel
line from between the No.1 injector and the No.1 fuel delivery valve holder. Remove the NO.1 fuel delivery
valve holder and remove the delivery valve spring beneath the holder. Reinstall only the delivery valve holder
and re-attach the high pressure fuel
line to the delivery holder. Attach H so that the end that would connect
to the fuel injector is pointing away from the engine. Fuel will flow from this line during the timing check.
Rotate the engine's crankshaft in
Hs
normal direction of rotation to posi-
tion piston No.1 at the beginning
of
its compression stroke
Move the throttle lever
to Hs full open
position and operate the electric lift
pump.
Slowly rotate the crankshaft
clockwise (as viewed from the
front), catching the fuel from the No.
1 fuel
line, until the Instant the fuel
completely stops flowing (no drips).
At this instant, the
23
0
BTDC timing
mark on the crankshaft pulley
should be directly aligned wHh the
timing indicator on the front of the
gear case (refer
to the illustrations
on pages 86 and 87).
DELIVERY VALVE HOLDER
DELIVERY VALVE SPRING
DELIV
VALVE
BAR R E L '-::::"':17'TtJt;1
PLUNGER
CONTROL
PINION
PLUNGER SPRING
7';I"'-::'-~-CONTROL RACK
TAPPET
If the specified injection timing (23
0
BTDC) cannot be attained, adjust the timing by increasing or decreas-
ing the thickness
of shim material under the injection pump's mounting flange to change the injection timing
point. Changing the shim thickness
by 0.004 inch (0.01 mm) changes the injection timing by approximately
one degree. To advance the timing, decrease the shim thickness, as required. To retard the timing, increase
the shim thickness, as required. Refer
to your engine's Parts List for shim part numbers.
Weslerbeke Diesel Engines
88