Service manual

[Jel injection pump
The Injf'ction pump is the Bosch "Mine K type" It is a preci·
sian riPee nf eQlJipment machined to close tolerances and its
rerfor l1lance directly affects the performance of the engine.
Therefore, handle it with care.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
ri0 .....
Ir~
Injection pump ass'v
Deliverv valve holder
Deliverv valve spring
Deliverv valve gasket
Deliverv valve
Cvlinder pump element
Air bleeder screw
Packing
Hollow screw
Packing
Tappet
guide pin
Clamp pin
Bolt
(I)
co
14. Adjusting plate
15. Control rack
16. Pump housing
17.
Control sleeve
18. Upper spring sheet
19.
Plunger spring
20. Lower spring sheet
21. Shim
22. Tappet ass'v
23. Roller
24. Roller bushing
25.
Roller pin
Fig. 5. Fuel Injection Puf'(lP
(4 )
.. Handling the injection pump
Use care in handling and using the injection pump. As men·
tioned before, the injection pump is a precision piece of
equipment and care should be taken not to drop it or clamp it
trghtly when working on it. Also, be sure to use only clean
fuel that has been filtered. Oil drums left outdoors are always
considered
to contain water, so always filter this fuel before
using.
Clean fuel is a must as the fuel is forced through parts of the
pump and nozzel with clearances of 0.0004 in. (1/1000mm)
which may easily be stuck or rusted by even the slightest
amount of water in the fuel.
..
Installing the injection pump
When installing the injection pump, make certain that the
control rack pin is correctly placed in the 0.2 in. (5mm) wide
groove of the fork lever (,) before tightening the attaching
bolts Refer to the diagram. If the bolts are drawn down with
the rack pin off the groove, the rack may over travel and stick
in this position. This would cause excess fuel flow, allowing
the engine to overspeed which would result in engine failure.