Technical data

I
njection pump
Adjust Injection pump
30
NOTE
Slide the pump in to about the last 4 mm
without overcoming any resistance. Only
then may resistance occur due to the
tension of the tappet spring
- This tension can be overcome by a small
pressure and the pump pushed in completely by
hand.
Preliminary work:
- Clamp off the fuel supply line
- Unscrew injection pump pressure valve holder.
Remove spring, sealing ring, valve cone and
pressure valve (see figure)
- Screw in adjusting device No 74 64 1 333 535
with sealing ring and pressure valve body
If this is not possible, the plunger pin is
interfering with the regulator lever.
CAUTION
A fastening of the pump in this position
would cause serious damage to the
pump, regulator lever and, in some
cases, to the engine (during start,
because of a blocked regulator)
- Determine the correct position of the injection
pump:
(1) Move the throttle in both directions. The
regulator lever must audibly reach its stops.
(2) Remove the injection pipe together with
delivery valve holder
NOTE
When moving the throttle and the start filling
button, the pump plunger must rotate
- Screw down the injection pump after the
completed check
- Connect the fuel supply line and fuel return
hose
- Adjust injection pump
Injection Pump Adjustment
Injection timing –
delivery end in degrees
before TDC
Delivery stroke in mm
11.5 – 12.5
1.40
NOTE
The injection pump of this engine has the helical
groove on top of the plunger. The adjustment of the
injection timing and delivery stroke is therefore done
at the injection end.
Set throttle into position “START”. Do not pull cold
start filler.
- Set flywheel to approx 2.00 mm before top dead
center (observe direction of rotation)
- The marking for tope dead center (OT) as well
as the degrees for the injection pump timing are
located on the flywheel
- The countermarking on the crankcase is located
on the flange thread hole on the upper right
(when looking at the flywheel)
- Insert dial indicator with extension pin with the
zero setting at 1.00 mm and clamp (45)
- Open the fuel supply line. Fuel free from air
must flow from the adjustment device.