Oil Pump Assembly: Reassembly

Aligning marks made during disassembly, install drive and driven gear into housing. Using feeler gauge, measure clearance between driven (outer) gear and pump housing. Clearance should be .003-.006" (.07-.15 mm). If beyond specification, replace oil pump assembly.
Check clearance between driven (outer) gear teeth and crescent. Clearance should be .004-.006" (.11-.15 mm). If not, replace oil pump assembly.

Fig 1: Measuring Housing-to-Gear Face Clearance
Courtesy of ISUZU MOTOR CO.
Using straightedge and feeler gauge, check pump housing face-to-gear face clearance. Clearance should be .0008-.0020" (.020-.050 mm). If not, replace oil pump assembly.
Lubricate all parts with ATF. Press new oil seal into pump housing. Assemble pump cover to housing. Install bolts finger tight. Fit Centering Clamp (5077) around housing and cover. Tighten centering clamp screw to align housing and cover. See Fig 2.

Fig 2: Aligning Oil Pump Housing & Cover
Courtesy of VOLVO CARS OF NORTH AMERICA.
Tighten bolts. Remove centering clamp. Lubricate large "O" ring with ATF. Install "O" ring in groove on pump housing. Lubricate oil seal rings with petroleum jelly. Install rings on pump cover.