Install the drive shaft with inner rotor, then install the outer (driven) rotor ensuring that face with
chamfered edge enters the pump body first (see Figure 5-47). Perform the three following dimensional checks.
Clearances for these checks are given in paragraph 1-58. They are the clearances
applicable to a new pump and are Intended to be used as a guide. If oil pump is
worn to such an extent that it adversely affects the working oil pressure, replace
Check the clearance between the inner and outer rotors (see Figure 5-48).
Check the clearance between the outer rotor and the pump body (see Figure 5-47).
Check the clearance between the rotors and the end cover assembly using a straightedge and
Figure 5-47. Outer Rotor Clearance.
Figure 5-48. Inner Rotor Clearance.
Oil Pump Assembly.
(1) Replace the end cover assembly and install the four securing setscrews. Ensure correct positioning so
that the suction and delivery pipes will locate correctly.
(2) Press the oil pump drive gear onto the shaft.
(3) Rotate the pump by hand to ensure that it turns freely.
Oil Pump Installation (See Appendix F Figures 59 and 60).
(1) Loosely install the suction and delivery pipes (10).
(2) Place the oil pump (1) in position, align with the securing screw (6), and lock it with new tabwasher (7).
(3) Tighten the delivery pipe (10) at both ends. Install the setscrew (4, Appendix F, Figure 60) securing the
Ensure that the strainer has been thoroughly cleaned in suitable cleaning fluid
before being refitted.
(4) Tighten the suction pipe at the pump end. Install the strainer (7) on the end of the suction pipe.
(5) Install the oil pan (see paragraph 5-21).
(6) Fill crankcase with clean oil of an approved grade (see Chapter 3, Section I).
Oil Pump Pressure Relief Valve Removal (see Appendix E Figure 59).
Remove the oil pump (see c above).
Remove suction and delivery pipes (10).
Remove the four securing setscrews and remove the end cover assembly.