Perkins New 1000 Series, Руководство по ремонту, Страница: 104 / 290

14
104 Workshop Manual, TPD 1350, issue 3
New 1000 Series
Data and dimensions
Note: This information is given as a guide for personnel engaged on engine overhauls. The dimensions which
are shown are those which are mainly used in the factory. The information applies to all engines, unless an
engine type code is shown.
Crankshaft
Diameter of main journals:
- Four cylinder engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76,16/76,18 mm (2.998/2.999 in)
- Six cylinder engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76,159/76,190 mm (2.9984/2.9996 in)
Maximum wear and ovality on journals and crank pins . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,04 mm (0.0016 in)
Width of front journal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36,93/37,69 mm (1.454/1.484 in)
Width of centre journal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,15/44,22 mm (1.738/1.741 in)
Width of all other journals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39,24/39,35 mm (1.545/1.549 in)
Diameter of crank pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63,47/63,49 mm (2.499/2.500 in)
Width of crank pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,35/40,42 mm (1.589/1.591 in)
Diameter of flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133,27/133,37 mm (5.247/5.251 in)
Depth of recess for spigot bearing:
- Four cylinder engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20,22/20,98 mm (0.796/0.826 in)
- Six cylinder engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,72/15,48 mm (0.579/0.609 in)
Bore of recess for spigot bearing:
- Four cylinder engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46,96/46,99 mm (1.849/1.850 in)
- Six cylinder engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51,97/51,99 mm (2.046/2.047 in)
Crankshaft end-float. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,05/0,38 mm (0.002/0.015 in)
Maximum permissible end-float . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,51 mm (0.020 in)
Fillet radii of journals and crank pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,68/3,96 mm (0.145/0.156 in)
Undersize journals and crank pins. . . . . . . . . . . . . . . . . . . . . . . . . -0,25 mm (-0.010 in); -0,51 mm (-0.020 in);
-0,76 mm (-0.030 in).
Crankshaft heat treatment
- Induction hardened . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Part numbers 3131H024
- Nitrocarburised . . . . . . . . . . . . . . . . . . . . . . . . . .Part numbers 3131H022, 31315991, 31315995, 31315681
- 60 hour Nitride . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Part numbers 3131H021
Crankshaft overhaul
Notes:
! Induction hardened crank shafts need not be hardened after they have been machined undersize.
! Nitrocarburised crankshafts must be hardened again each time they are machined. These crankshafts
must be nitrocarburised or, if this process is not available, they can be nitrided for 20 hours. If neither
process is available a new crankshaft, or Power Exchange crankshaft, must be fitted.
! Crankshafts which have been nitrided for 60 hours can be reground 0,25 mm (0.010 in) without the need
to harden them again.
! Check the crankshaft for cracks before and after it is ground. Demagnetise the crankshaft after it has been
checked for cracks.
!
After the crankshaft has been machined remove any sharp corners from the lubricating oil holes.
! Surface finish and fillet radii must be maintained.
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