Subaru Robin PKX201 - Manual (Page 87)

High Pressure Pumps - PKX Service
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49. There is a correct way, and a wrong to install the inlet
gasket. The casting marks must face towards the
engine. If in doubt look at the picture in step 50.
50. This picture shows correct way to install gasket. Make
sure gasket is fl at against the outer housing when
reinstalling cover. Align holes and thread the three
bolts into the nozzle and cover.
51. After reinstalling bolts, torque bolts to 4.5 to 6 ft. lbs
Note: The gasket tab must point upward to be
installed
correctly.
52. Pull the engine over with rope start to make sure there
is no binding of pump components. Then fi ll with gas,
oil, and prime water. Start engine and allow to warm
up for a few seconds, then run the throttle at
full speed. Place vacuum tester over intake
opening and check guage reading. The needle should
rise to 20 to 25 inches of vacuum within a few
seconds. If reading is lower, recheck the volute to
impeller clearance as well as possible air leaks around
gasket areas.