PISTONS AND CONNECTING RODS—F.4
Fig. F.7.
Checking Piston Height In relation to Cylinder Block
Top Face
the piston and rod numbers relate to the cylinder
into which they are being fitted. Ensure that with
the rod identification number opposite to the
camshaft, the word "Front" marked on the piston
crown is towards the front of the engine. If not,
remove the piston from the connecting rod and refit
correctly as previously detailed.
3.
Turn the crankshaft until the appropriate crankpin
is at bottom center, draw the con-
necting rod to the bearing shell, locating it in the tag
slot.
4.
Refit the other correct half bearing shell to the cap,
again locating it in the tag slot, and refit the cap and
bearing shell ensuring that the numbers stamped
on the rod and cap coincide. Refit the two
connecting rod bolts with the flat on the head of
each bolt located against the milled shoulder on the
rod. Secure with two new nuts to a torque wrench
setting as given on Page B.1.
5.
Refit the lubricating oil sump (see Page L.5).
6.
Refit the cylinder head (see Page E.6).
Fitting New Pistons
When fitting new pistons it is essential to see that the
piston and connecting rod are assembled correctly
before fitting them to the engine, see "To Assemble the
Pistons and Rings to the Connecting Rod."
Ensure that genuine Perkins parts are used, so that
the new piston height will, when assembled, in the
engine, comply with the tolerances as listed in
"Technical Data" - Page B.2.
NOTE:
As from Engine Nos. 236U135765 and
236U147150L, the pistons must be
topped to the correct height above
the cylinder block face as given on
page B.2.
