Table 1-2. Repair and Replacement Standards - Font) Components Water   pump: Hub - for water pump pulley Bore in hub for shaft Shaft  diameter Fit - Shaft diameter to hub bore Idler gear assembly: Idler gear bearing Bearing bore (bore for idler shaft) Shaft  diameter Fit - shaft to bearing Bearing outside diameter Bore in idler gear Fit - bearing outside diameter to idler gear Bore in cylinder block for idler gear shaft Idler shaft outside diameter Fit - idler shaft to bore in cylinder block Hydraulic pump drive assembly Hydraulic  pump  drive  bearing Bearing bore (bore for hydraulic pump drive shaft) Shaft  diameter Fit - shaft to bearing Bearing outside diameter Bore in hydraulic pump drive housing for bearing Fit - Bearing outside diameter to hydraulic pump drive  housing Manufacturer’s dimensions  and tolerances  in inches Minimum Maximum 0.7435 0.7460 0.0015 1.000 0.9990 0.0000 1.980 1.9785 0.0005 0.998 0.9990 0.0000 1.0000 1.0008 0.0000 1.980 1.979 0.0000 0.7445 0.7465 0.0030 interfer- ence 1.0008 1.0000 0.0018 clearance 1.981 1.9795 0.0025 inter- ference 0.999 1.000 0.002 inter- ference 1.0008 1.0013 0.0013 1.981 1.980 0.002 inter- ference Maximum allowable wear  and clearance 0.0005 0.0005 0.0025 interfer- ence 0.0008 0.001 0.0028 clearance 0.001 0.0001 0.002 inter - ference 0.001 0.001 0.002 inter- ference 0.0005 0.0005 0.0007 0.0005 0.0005 0.001 inter  - ference 1-43