John Deere 318 User Manual
A—Check Valve Plug (2
F—O-Ring (4 used)
G—Float Detent Spool
M—Ball (3 used)
B—O-Ring (2 used)
C—Spring (2 used)
I—Bushing (2 used)
D—Poppet (2 used)
J—Washer (2 used)
Versions Two and Three
IMPORTANT: Spools and body are matched and
must be replaced as a unit. Spools
must be installed into the same
bores from which they were
removed for proper operation of
Always use new O-rings. Damaged
or used parts will leak.
NOTE: Note location and position of fittings and
linkages to aid in assembly.
Lubricate all O-rings with petroleum jelly
Inspect all parts for wear or damage. Replace as
• Apply clean John Deere Low Viscosity HY-GARD
oil on all internal parts during assembly.
• Apply MPG-2
Multi-Purpose Polymer Grease on
springs (K, N and U) and inside of caps (Q and R).
• Tighten caps (Q and R) to 31 N·m (23 lb-ft).
Hydraulic Control Valve/Disassemble, Inspect and Assemble
316, 318 & 420 Lawn and Garden Tractors