ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual page 863

14. Remove the four bearing retaining screws (10), and washers (12) from the gear headplate.
For Mechanical Seal Version
Remove bearing retainer plate by removing 8 screws.
15. Attach puller plate to the gear headplate using the tapped holes on the bearing housing.
16. Install a gear puller to one of the shafts and attach puller arms to the plate (see Figure 6-6).
17. Remove mounting foot (17) from the gear headplate by removing 4 capscrews (16).
18. Push the impeller shaft through the gear headplate and remove the impeller assembly(23) (see Figure 6-6).
Remove the other impeller assembly following the same procedure.
19. Remove the cap screws (21) securing the gear headplate to the impeller case. Located near each dowel pin
on the headplate is a threaded hole. Insert a 5/16-18 UNC capscrew into each of the threaded holes.
Tighten the screws evenly until the headplate separates from the impeller case.
20. Remove the two gear and bearings (14) from the gear headplate (18) as done in step 12.
21. Remove the oil seals (15) from gear headplate (19) as done in step 13.
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