Perkins New 1000 Series, Руководство по ремонту, Страница: 52 / 290

12
52 Workshop Manual, TPD 1350, issue 3
New 1000 Series
To remove and to fit 12-11
Special tools:
Remover/replacer for valve guides (main tool), PD.1D
Adaptor PD.1D-13 used with PD.1D, PD.1C-6 and
PD.248
Distance piece, inlet guide, PD.1C-6 used with PD.1D
and PD.1D-13
Distance piece, exhaust guide, PD.248 used with
PD.1D and PD.1D-13
The partially finished valve guides are reamed and
the valve seats are cut in one operation with a special
tool. The valve seat and the guide are cut in one
operation to ensure the concentricity of the valve seat
to the valve guide. This will ensure a good seal
between the guide and its seat. New valves and new
valve seat inserts must be fitted each time a new
valve guide is fitted. Valves must not be lapped
, see
operation 12-13 . If all or most of the original valve
guides need to be renewed it may be cost effective to
overhaul or exchange the cylinder head.
To remove
1 Fit the adaptor (A4) into the remover/replacer tool
(A3).
2 With the adaptor fitted to the tool, put the spacer
(A5) in position on the tool. Pass the adaptor through
the valve guide (A6) and put the spacer and tool in
position on the valve seat.
3 Fit the attachment (A7) to secure the adaptor to the
valve guide.
4 Hold the top handle (A1) and turn the bottom
handle (A2) clockwise to pull the valve guide out of
the cylinder head.
1
2
3
4
5
6
7
A
A0064
Purchased from www.WorkshopManuals.co.uk