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(e) Remove the camshaft and gearwheel assembly.
(f) Remove the nut retaining the oil pump gearwheel and remove the
gearwheel The gearwheel is keyed to the shaft.
(g) Remove the screws securing the pump and withdraw the pump.
(h) The backplate is dowelled to the body.
67. Oil pump maintenance
(a) Thoroughly clean all parts.
(b) Carefully examine the rotors and shaft If they are scored or show signs
of wear fit new pump (see Technical Data)
68. To replace oil pump
(a) Generally reverse the instructions for removal.
(b) Pour a small quantity of lubricating oil into the pump through the port
before assembling the pump to the engine
(c) Tighten the oil pump screws using a torque spanner set to the figure
shown under Technical Data
69. Fuel system
(a) Fuel from the tank flows through a filter to the injection pump which
supplies it under high pressure to the injector
(b) A small amount of fuel is always leaking back along the injector nozzle
needle and this is returned to the fuel system by a pipe.
(c) The quantity of fuel injected during each cycle is very small and the fuel
injection equipment is manufactured to very fine limits IT REQUIRES
EXTREME CARE AND ABSOLUTE CLEANLINESS IN HANDLING
(d) Should any part of the fuel system, including pipes, be removed from
the engine, it should be placed >n a clean container which is filled with
clean fuel NO FILING. GRINDING, SCRAPING OR , SAWING
SHOULD BE CARRIED OUT WITHIN A PEW YARDS OF
DISMANTLED FUEL INJECTION EQUIPMENT
(e) Replace the equipment wet No rag, cloth or waste should touch it.
(f) Unless the user has been trained in the care and repair of fuel injection
equipment, he should not dismantle it in any way other than as
described in subsequent paragraphs.
(g) Fuel pumps and injectors should be returned to Petters Ltd or their
agents for repair or replacement Users are advised to keep a nozzle in
their spares kit so that a faulty one can be renewed immediately.
(h) If the exhaust becomes dirty, it is an indication that either the engine is
being overloaded or the fuel injection system requires servicing.
70. To clean fuel filter
(a) To remove element
(i) Drain the fuel tank.
(ii) Remove the tank-to-pump fuel pipe.
(iii) Carefully unscrew the fuel filter element plug and remove it from
the tank.
(b) If the element shows a large deposit of dirt, remove the tank and wash
out with paraffin or clean fuel. Fit a new element, obtainable from
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