New Holland CX720 Repair Manual page 1772

Cylinder block - Assemble (B.10.A.70 - F.10.A.20)
CX720, CX740, CX760, CX780, CX820, CX840
NOTE: Pistons that are replaced must be of the same type that were removed and have the same identification letters,
and numbers, as embossed on the piston crown
1. Upon re-assembly with the piston at Top Dead Cen-
tre, ensure the piston to block height is correct using
a dial indicator to, Fig. 1.
13-0.38 mm (0.005-0.015 in)
2. Check the piston to bore clearance in the following
manner.
A, Measure the cylinder bore diameter at point A,
82.6 mm (3.25 in.) from the top of the block.
B, Measure the diameter of the piston at point B, 25.4
mm (1.00 in) from the bottom of the piston.
C, Subtract piston diameter from the bore diameter
and the resultant figure for a new, unused engine
should be:
152-0.178 mm (0.0060-0.0070 in)
3. After an engine has run and settled down the maxi-
mum bore to piston clearance allowed is 0.250 mm.
(0.011 in).
Where pistons are only available as standard. New
pistons should always be fitted if the clearance ex-
ceeds specification.
D, If clearance is
E, If the clearance is "less" hone bore to obtain de-
sired clearance.
Lubricate all of the components with engine oil and
assemble the connecting rod, and piston, with the
letter or grade mark on the piston, aligned to the pip
(1) on the connecting rod. Install the piston pin and
retainers.
POWER PRODUCTION - ENGINE
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