Subaru Robin PKX201 - Manual (Page 38)

Centrifugal Pumps - PKX Service
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39. Re-install the volute into the outer case making sure
the slot in the volute is resting on the casting molded
into the outer case.
40. It is important that the volute slot matches with the cast
in notch in the outer pump case.
Note: See arrow.
41. Replace the cover and volute onto the pump back
plate. Install the four outer pump case bolts.
42. Tighten and torque the four bolts to:
PKX201- 9 to 11 ft. lbs
PKX301-16 to 20 ft lbs