Subaru Robin PKX201 - Manual (Page 85)

High Pressure Pumps - PKX Service
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41. Tighten and torque the four bolts to a torque of 22 to
25 ft. lbs.
42. Once the case is torqued down, pull the recoil starter
to check that pump and engine turn over freely. If OK,
then re-fi ll with prime water. Next check the engine oil
and start the engine. Apply vacuum pressure plate
tester. Reading should be between 20 to 25 lbs of
vacuum at sea level.
43. If it becomes necessary to remove the discharge
nozzle, the following procedure is recommended.
Loosen and remove the 4 bolts that hold the nozzle
housing to the outer casing.
44. Remove the discharge nozzle and inspect the gasket
for tears or breaks. Also check the nozzle casting for
cracks.