Subaru Robin PKX201 - Manual (Page 26)

PKV101 Service
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40. Tighten all bolts and fi ll with prime water. The proper
torque value for these bolts is 9 to 11 ft. lbs.
Check engine oil and test for proper vacuum with
vac uum plate tester. The vacuum guage should read
25 lbs of pressure.
Note: See test procedures under separate heading.
39. Re-install the cover and volute onto the back plate with
the four bolts.
38. Install the volute into the outer pump housing making
sure to put the volute slot into the tab that is em
bossed in the outer cover. Check the outer o-ring
condition as noted earlier.
37. Tighten impeller with rubber mallet by hitting on one of
vanes until snug.