John Deere 318 - Manual (Page 156)

NOTE: Port manifold has three springs which may come
loose during disassembly.
10. Carefully remove port manifold (three plates bonded
together).
IMPORTANT: Do not interchange springs. The
steering valve has two sets of springs.
Keep springs with respective manifold.
11. Remove three springs (A).
NOTE: If one or more springs are damaged, all six
springs in valve must be replaced.
12. Inspect springs and pins (B) for distortion, wear, or
damage.
M36836
-UN
-29AUG88
13. Inspect port manifold machined surfaces (A) for
scratches or scoring. A polished pattern from the rotation
of the valve plate and hex drive assembly is normal. All
edges (B) must be sharp, free of nicks and burrs.
NOTE: Scoring is indicated by fine scratches or grooves
cut into the manifold. When these scratches can
be detected by feel finger nail or lead pencil, the
manifold should be replaced.
M36837
-UN
-29AUG88
14. Remove the valve ring and two seal rings (A). Check
valve ring for nicks and scoring. If the valve ring is
damaged, it must be replaced.
M36838
-UN
-29AUG88
MX,15906006,10 -19-10MAR95
MX,15906006,11 -19-01MAR95
MX,15906006,12 -19-01MAR95
Steering—318 and 420/Steering Valve
TM1590 (17MAY95)
60-06-6
316, 318 & 420 Lawn and Garden Tractors
020895
60
06
6