John Deere 318 - Manual (Page 154)

4. Four-port and early five-port; Loosen plug one turn.
M77338
-UN
-21FEB95
IMPORTANT: Do not damage fittings during nut
removal. Do not nick or scratch the
machined surfaces of the steering
valve.
5. Remove nuts to remove port cover assembly (four
plates bonded together).
Early Five-Port Shown
M43841
-UN
-08JAN90
6. Later five-port; Remove port cover and check ball (A).
M77303
-UN
-06MAR95
MX,15906006,5 -19-14MAR95
MX,15906006,6 -19-10MAR95
MX,15906006,7 -19-10MAR95
Steering—318 and 420/Steering Valve
TM1590 (17MAY95)
60-06-4
316, 318 & 420 Lawn and Garden Tractors
020895
60
06
4