Bonneville V6-231 3.8L VIN 3 SFI (1988)
Fig. 9 Power head assembly exploded view. Delco-Moraine tandem diaphragm booster
3. Install secondary power piston bearing into divider with flat surface of bearing on side of divider with 6 lugs.
4. Install guide sleeve J-28458 or equivalent over power piston, lubricate inner diameter of secondary bearing, then install divider assembly with
lugged side facing up.
5. Lubricate inner lip of primary diaphragm. Fit diaphragm over support plate, then install diaphragm assembly on power piston.
6. Ensure that diaphragms and support plates are properly positioned, install new diaphragm retainer, then seat retainer on power piston using guide
sleeve J-28458 or equivalent and suitable hammer.
7. Install primary power piston bearing in rear housing and lubricate inner diameter of bearing.
