Measuring inner rotor tip-to-outer rotor clearance

5Remove the outer rotor from the pump body (see illustration). Note:The outer rotor is punchmarked to ensure that it is fitted the correct way round. Honda specify that the punchmark should face the pump body but on the bike we stripped down the punchmark faced the pump cover. The important thing is to install the rotor the same way as it was when it was removed so that mated surfaces continue to run together.

6Clean all the components in solvent.

7 Inspect the pump body and rotors for scoring and wear (see illustration).If any damage, scoring or uneven or excessive wear is evident, renew the pump (individual components are not available). If the engine is being rebuilt, it is advisable to fit a new oil pump as a matter of course.

8 Reassemble the pump components and measure the clearance between the inner rotor tip and the outer rotor with a feeler gauge and compare it that listed in the specifications at the beginning of this Chapter (see illustration).If the clearance measured is greater than that listed, renew the pump.

9 Measure the clearance between the outer rotor and the pump body with a feeler gauge and compare it to that listed in thespecifications at the beginning of this Chapter (see illustration).If the clearance measured is greater than that listed, renew the pump.

10Lay a straight-edge across the rotors and
the pump body and, using a feeler gauge,
measure the rotor end-float (the gap between
the rotors and the straight-edge (see

illustration).If the clearance measured greater than that listed, renew the pump.

11Check the pump drive chain and sprockets for wear or damage, and renew them as a set if necessary.

12 If the pump is good, make sure all the components are clean, then lubricate them with new engine oil.

13 Install the outer rotor into the pump body with the punchmark facing the same way as noted on removal (see Step 5 and Note).

14Fit the drive pin into the pump driveshaft and slide the inner rotor onto the thin-tabbed end of the shaft, making sure the pin ends fit into the notches in the bottom of the rotor. Slide the thrust washer onto the thick-tabbed end of the shaft and against the bottom of the inner rotor. Fit the shaft and inner rotor into the pump body (see illustration 17.4).

15Fit the dowels Into the pump body, install the cover and tighten the bolt to the specified torque setting (see illustration).Ensure that the pump driveshaft rotates freely.

Installation

16Slide the pump into position, turning the driveshaft until it engages correctly with the water pump. Ensure the dowels locate correctly in the crankcase. Fit the pump mounting bolts and tighten them securely (see illustrations).

17Install the oil pump drive sprocket, pump sprocket and chain and the clutch (see Section 15).

Date: 2016-01-14; view: 784