Chapter 4 – Lubrication
Service manual AJP PR3/PR4 4 - 10
Install the set of pump gears with the rotor
shaft in the pump housing, aligning the flat
surfaces of the gear and shaft.
Assemble the cover on the rotors, with the
protruding end aligned with the recess in the
pump housing.
Tighten the two screws to the correct torque.
In the pump of the 240cc engine, if applicable,
to install the rotor cover align the guide with
the tooth in the pump housing.
Install the rotor cover screws and tighten to
the specified tightening.
Tightening torques:
Cover screws of pump rotors:
3N.m
(0,3kgf.m)
Pump sprocket cover bolts (240cm
3
):
5N.m
(0,5Kgf.m)
Assemble the follower sprocket and fit the
circlip correctly.
Ensure that the oil pump turns smoothly
before installing on the engine.
Installation
Cover the sealing rings using oil and install in
the lower crankcase slots.
Align the holes in the drive gear of the oil
pump with the holes of the fixing screws of the
oil pump.