Perkins Phaser Series - Piston Rings; To Remove and to Fit

PISTON AND CONNECTING ROD ASSEMBLIES 13
To check the height grade
of a "Fastram" piston13A-03B
For engines fitted with earlier "Fastram "pistons
there are five height grades (A to E) of piston in
production and in service.
The latest "Fastram" pistons are supplied in six
height grades (F to L) in production and in service.
Identification of the height grade is by the letter for
each piston which is stamped on the top of the
piston (A). The letter A or F is the highest grade
and letter E or L is the lowest grade. The difference
between the grades is 0,045 mm (0.0018 in).
If a new piston is fitted, ensure that it is of the
correct height grade. The height grade can be
checked by measurement, from the centre of the
gudgeon pin to the top of the piston (B1). The
dimensions for each grade are listed in the table
below:
* Earlier engines
Piston grade
letter
Piston height
dimension
(mm)
Latest
equivalent
grade
A* 70,334 G
B* 70,289 H
C* 70,244 J
D* 70,199 K
E* 70,154 L
F 70,391
G 70,345
H 70,299
J 70,253
K 70,207
L 70,161
Note: The earlier piston grades A to E are now not
supplied as a part. The latest equivalent grades G
to L shown in the table above are to be used
instead.
Piston rings
To remove and to fit13A-04
The piston used in the Phaser and 1000 Series
engines have two compression rings and an oil
control ring. All the piston rings are above the
gudgeon pin. Piston rings have different design
features. To ensure that the correct type is
obtained always use the engine identification
number to order new parts.
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Perkins Phaser/1000 Series, April 1995 13A.09