John Deere 318 - Manual (Page 155)

NOTE: Four-port not shown. Unit is similar to early
five-port.
7. Remove seal ring and O-rings (A).
8. Inspect port cover for scratches on machined surfaces
or damage to fittings. Replace cover if damaged.
Early Five-Port
Later Five-Port
M36834
-UN
-29AUG88
M78056
-UN
-06MAR95
9. Four-port and early five-port; Remove plug (A), O-ring
(B) and check ball (C).
Five-Port Shown
M43832
-UN
-08JAN90
MX,15906006,8 -19-29MAR95
MX,15906006,9 -19-10MAR95
Steering—318 and 420/Steering Valve
TM1590 (17MAY95)
60-06-5
316, 318 & 420 Lawn and Garden Tractors
020895
60
06
5