FUEL
SYSTEM
SERVICE
Injector
1.
Disconnect the return pipe from the nozzle holder upper
nipple.
2. Disconnect the
fuel injection pipe from the nozzle holder.
3. Loosen the nozzle holder attaching bolts and remove the
holder assembly.
4. When disassembling the nozzle holder into parts, use the
following procedure:
8.
Holding the nozzle holder body in a vice, remove the
retaining nut with a spanner wrench. When holding
in
the vice, be sure to use an aluminum or copper plate
adapter.
h.
Remove the shim, pressure spring, flange, pressure
pin and distance piece.
c. Remove the nozzle from the retaining nut. If the noz-
zle
is
hard to remove, apply light taps to
it
with a
wooden block. Be careful not to damage the nozzle
needle valve.
NOZZLE
HOLDER
INSPECTION
Fuel
Filter
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NOZZLE
,
.
RETAINING
NUT
Check the filter element for contamination. The regular ele-
ment replacement interval is
250 hours. Replace the element
more frequently
if
necessary.
Fuel
Lift
Pump
The fuel pump operates during the start sequence when PRE-
HEAT is depressed. Simulate a start and depress PREHEAT.
The pump should produce a clicking sound indicating the
pumping piston in the pump is pumping. If no clicking is
heard, check that there is 12V DC at the pump connection
and that the pump is properly grounded.
1.
Checking the pump delivery. Test the pump by connect-
ing a battery and fuel line, as illustrated. Fuel delivery
must be 225 cc (.5 pints) or more every 15 seconds.
TESTING
THE
FUEL
LIFT
PUMP
Fuel
Injection
Pump
1.
Delivery valve seat. Check the contact surface
of
the
delivery valve seat. Replace
if
defective.
2.
Plunger barrel. Check the plunger for seizure, damage
and rust. Also check to see
if
the plunger slides smoofhly
when inserted into the barrel. If defective, do not repair
it, but be sure to replace as a set with a new one.
3. Control rack and pinion.
If
the rack and pinion have any
worn
or
damaged teeth, replace.
4.
Tappet.
Check the tappet O.D., roller and shaft for wear
and damage. If defective, replace.
Nozzle
1.
Check the nozzle for incorrect contact and damage.
Replace the nozzle as an assembly
if
defective.
2. Check the pressure spring for damage.
NOTE:
Also check
the
Angleich set plates and set springs
for wear and damage .
REASSEMBLY
Fuel
Filter
Install the filter element and filter cup O-rings
in
position.
Tighten the retaining nut securely.
Fuel
Lift
Pump
To
reassemble, set the plunger, plunger spring, valve, O-ring
and washer in position
in
that order, and as a final step, fit the
retainer to prevent the above-mentioned parts from popping
out
of
position, (see illustration).
Put the filter
in
position and fit the magnet and gasket in the
cover.
Using a 17 mm spanner, fasten up to the stopper por-
tion
in
such a way as to prevent air leakage.
Injection
Pump
1. Insert the plunger barrel with its slots in alignment with
the dowel pins projecting
in
the pump housing.
2. Install the O-ring
in
the delivery valve holder.
Engines & Generators
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