John Deere 318 - Manual (Page 75)

2. Inspect cylinder block assemblies.
IMPORTANT: Do not interchange pistons between
motor and pump cylinder blocks.
Pistons and cylinder blocks are
matched.
Lift piston retainer and pistons from cylinder block.
Check for free movement of pistons in cylinder bores.
M36111
-UN
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3. Remove and inspect all pistons.
Check barrel (B) for scoring, discoloration, or any signs
of separation of slippers.
Check slipper (A) for scoring, smearing, rolled edges and
a full 360˚ free rotation on barrel.
Check lubrication hole (C) for blockage. Clean with
compressed air.
If any component of the piston is damaged, the cylinder
block assembly must be replaced.
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4. Remove and inspect both piston retainers.
Check retainer for flatness, nicks, burrs and discoloration.
Check area around piston slippers (A) for scoring.
If any part of the piston retainer is damaged, the cylinder
block assembly must be replaced.
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M45,5005A,51 -19-11JAN85
M45,5005A,52 -19-11JAN85
M45,5005A,53 -19-11JAN85
Transmission/Disassemble
TM1590 (17MAY95)
50-05-15
316, 318 & 420 Lawn and Garden Tractors
020895
50
05
15