Perkins New 1000 Series, Workshop Manual, Page: 139 / 290

Workshop Manual, TPD 1350, issue 3 139
16
New 1000 Series
Cylinder bore specifications, engine types AR and AS
Note: Two oversize pistons are available in service:- 0,5 mm (0.020 in) and 1,0 mm (0.040 in).
Caution: Specialist training and equipment is needed to machine the cylinder bore. For further information
contact your nearest Perkins Distributor.
Preliminary bore
Final size of standard bore before it is honed . . . . . . . . . . . . . . . . . . 102,873/102,924 mm (4.0501/4.0521 in)
First oversize of bore before it is honed . . . . . . . . . . . . . . . . . . . . . . 103,373/103,424 mm (4.0698/4.0718 in)
Second oversize of bore before it is honed . . . . . . . . . . . . . . . . . . . . 103,873/103,924 mm (4.0894/4.0914 in)
Surface finish. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ra 3,2 to 4,0 micrometers
Maximum ovality and taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,02 mm (0.0008 in)
Diamond hone
Hone angle (cross hatch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35°
Finish size of standard bore, diamond honed . . . . . . . . . . . . . . . . . . 102,949/102,961 mm (4.0531/4.0536 in)
Finish size of first oversize of bore, diamond honed . . . . . . . . . . . . . 103,449/103,461 mm (4.0727/4.0732 in)
Finish size of second oversize of bore, diamond honed . . . . . . . . . . 103,949/103,961 mm (4.0924/4.0929 in)
Surface finish. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ra 2,2 to 3,0 micrometers
Maximum ovality and taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,012 mm (0.0005 in)
Silicone carbide base hone
Hone angle (cross hatch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35°
Finish size of standard bore,
silicon carbide base hone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103,000/103,025 mm (4.0551/4.0561 in)
Finish size of first oversize of bore,
silicon carbide honed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103,500/103,525 mm (4.0748/4.0757 in)
Finish size of second oversize of bore,
silicon carbide honed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104,000/104,025 mm (4.0944/4.0954 in)
Surface finish. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ra 1,3 to 1,6 micrometers
Maximum ovality and taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,010 mm (0.0004 in)
Silicone carbide plateau hone
Final finish size of standard bore,
silicon carbide (plateau hone) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103,000/103,025 mm (4.0551/4.0561 in)
Final finish size of first oversize of bore,
silicon carbide (plateau hone) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103,500/103,525 mm (4.0748/4.0757 in)
Final finish size of second oversize of bore,
silicon carbide (plateau hone) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104,000/104,025 mm (4.0944/4.0954 in)
Final surface finish grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ra 0,65/1,3 micrometers
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