LUBRICATION SYSTEM-L.3 2 L4 L5 1. Relief Valve Housing 2. Rotor Housing 3. Hole for Locating Screw 4. Pump Drive Gear 2. Install the drive shaft complete with inner rotor, then the outer (driven) rotor ensuring that the face which carries the chamfered edge enters the pump body first (Refer Fig. L.5), now carry out the three following dimensional checks. 4. Tap back the tab washer locking the location screw and support the lubricating oil pump assem- bly (if the engine is the normal way up), whilst the location screw is removed. (a) Check the clearance between the inner and outer rotors. (Refer Fig. L.6). (b) Check the clearance between the outer rotor and the pump body (Refer Fig. L.7).
(c) Check the clearance between the rotors and the end cover assembly using a straight edge and feeler gauges (Refer Fig. L.8). 5. Remove the lubricating oil pump assembly from the cylinder block as shown in Fig. L.2. To the Oil 1. Remove the delivery and suction pipes. The pump will now be as shown in Fig. LA. 2. Withdraw the drive gear by means of a suitable puller. 3. With the pump suitably held in a vice, (using protective clamps) remove the four securing set- screws and remove the end cover assembly. N.B. This end cover assembly also incorporates the pressure relief valve housing. 4. Withdraw the drive shaft complete with inner rotor. N.B.
It is advisable not to remove this inner rotor from the shaft as this item is not available as a separate part (See later note) .. 5. Withdraw the outer rotor. Inspection 1. Inspect for signs of wear, cracks, pitting, etc. L6