Perkins New 1000 Series, Руководство по ремонту, Страница: 130 / 290

16
130 Workshop Manual, TPD 1350, issue 3
New 1000 Series
Cylinder liner
To inspect 16-3
To ensure the best performance during the life of the
engine it is important that worn or damaged cylinder
liners are renewed. If a change of liner becomes
necessary in service, transition fit liners and partially
finished liners are available.
The condition of a cylinder liner is decided by:
! The amount and location of any polished areas.
! Wear.
! Damage to the liner wall.
Notes:
! It will not be necessary to renew the liners if:
! The honed finish can still be clearly seen.
! The engine performance and oil consumption is
acceptable.
To check the condition of a cylinder liner
1 Inspect the liner surface for cracks and deep
scratches.
2 Check the liner wall for areas where the honed
finish has been polished away. Check especially the
area around the top of the liner bore just below the
carbon ring. In this area, thrust from the top piston ring
is at its maximum.
Cautions:
! Do not use "Flex-hone" to repair cylinder liners.
! Damaged or worn liners must be discarded.
! New piston rings must be fitted when the cylinder
liner is renewed.
! An engine can have high oil consumption with very
little wear of the liner bores, if the surfaces of the
liners are glazed.
! Specialist training and equipment is needed to
machine the finish of a partially finished liner.
Partially finished cylinder liners must be bored and
then diamond honed, silicon carbide base honed and
silicon carbide plateau honed to the finished size to
conform to the dimensions in the data and dimensions
at the end of this section. Specialist training and
equipment is needed to machine a partially finished
liner. For further information contact your nearest
Perkins Distributor.
Purchased from www.WorkshopManuals.co.uk