John Deere engines piston and connecting rod installation Guide
NOTE: Pistons must be installed in the cylinder liner
from which they were removed.
1. Coat pistons and rings with clean engine oil. Install
pistons in liners, using JDE84 piston ring compressor.
NOTE: Make sure that “FRONT” mark (A) on the top of
each piston faces toward front end of cylinder
block.
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2. Push piston down until top ring is in liner.
3. Install bearing inserts, making sure small tangs (B) on
each half of the inserts fit in recess of rod and cap.
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4. Install cap so that large slot in cap (C) fits large tang
(D) on connecting rod.
5. Dip NEW connecting rod cap screws in clean oil and
tighten them alternately to following torques:
IMPORTANT: NEVER use connecting rod cap screws
more than once.
• 3029, 4039 and 6059 engines:
Initially tighten cap screws to 56 N·m (40 lb-ft)
• 4045 and 6068 engines:
Initially tighten cap screws to 66 N·m (50 lb-ft)
6. Torque-turn all cap screws 90—100 degrees. (See
next module).
CD,3274,G10,16 -19-20FEB92
