John Deere 318 - Manual (Page 170)

48. Four-port and early five-port; Install new O-ring (B)
on plug (A). Install check ball (C). Be sure check ball is
seated in bottom of hole. Install plug. Do not tighten.
Five-Port Shown
M43832
-UN
-08JAN90
NOTE: Four-port not shown. Unit is similar to early
five-port.
49. Later five-port; Install check ball (E) in countersunk
hole (hole closest to the center of the port manifold).
50. Apply petroleum jelly on new O-rings (A) and new
seal ring (B). Install O-rings and seal ring in port cover.
IMPORTANT: Align grooves (C) in port cover with
grooves (D) in manifold.
51. Install port cover with seals toward port manifold. Early Five-Port
A—O-Ring(s)
B—Seal Ring
C—Port Cover Alignment Grooves
D—Port Manifold Alignment Grooves
E—Check Ball (Later Five-Port)
Later Five-Port
M43843
-UN
-08JAN90
M78055
-UN
-06MAR95
52. Install and tighten four nuts in the sequence shown.
Tighten in several steps to 30 N·m (22 lb-ft).
Early Five-Port Shown
M43845
-UN
-11NOV89
MX,15906006,52 -19-10MAR95
MX,15906006,53 -19-29MAR95
MX,15906006,54 -19-10MAR95
Steering—318 and 420/Steering Valve
TM1590 (17MAY95)
60-06-20
316, 318 & 420 Lawn and Garden Tractors
020895
60
06
20