John Deere 318 - Manual (Page 153)

11. Remove steering unit from bottom of machine.
12. Make repairs as necessary. (See procedure in this
group.)
13. Installation is done in the revese order of removal.
• Install steering unit with marks made during removal or
with alignment grooves in port manifold and cover, facing
toward engine.
• Tighten steering wheel-to-shaft nut to 15 N·m (133
lb-in.).
• Bleed hydraulic system. (See procedure in Section 270,
Group 20.)
M31840
-UN
-28JUL89
DISASSEMBLE AND INSPECT STEERING
VALVE AND COLUMN
NOTE: Machines may be equipped with a four or
five-port steering valve. The four-port and early
five-port have a plug, O-ring and check ball in
the side of the port cover. The later five-port has
a check ball in the center of the port cover
(internal) and no external plug or O-ring.
IMPORTANT: Use DFMX1 Steering Valve Fixture
when servicing control valve. Holding
control valve in a vise can damage
valve.
1. Install DFMX1 Steering Valve Fixture (A) in a vise.
(See Section 299 for instructions to make fixture.)
2. Install steering valve, with steering column down, in
fixture. Fasten valve to fixture using four 5/16-24 UNF
nuts.
Early Five-Port Shown
3. Check position of alignment grooves (B) to aid in
assembly.
M43839
-UN
-06MAR95
MX,15906006,3 -19-10MAR95
MX,15906006,4 -19-10MAR95
Steering—318 and 420/Steering Valve
TM1590 (17MAY95)
60-06-3
316, 318 & 420 Lawn and Garden Tractors
020895
60
06
3