John Deere 318 - Manual (Page 397)

BEFORE YOU START
Always begin with this group to identify a failure in
the hydraulic system. The step-by-step procedures
will provide you with a quick check of the system. No
special tools are required to perform these checks. If
a failure is indicated, you will be referred to a more
detailed check, adjustment, or test.
Always start with the first step and follow the
sequence from left to right. Read each step
completely before performing the check.
This procedure is designed as a quick check of the
system. While performing the check, concentrate only
on the check you are performing and disregard
signals from unrelated components.
NOTE: The 316 has manual steering (gearbox),
single-spool control valve and rockshaft
cylinder.
The 318 has power steering, steering cylinder,
two-spool control valve, rockshaft cylinder and
oil cooler.
The 420 has power steering, steering cylinder,
three-spool control valve, rockshaft cylinder
and oil cooler.
For further information, refer to the overall
hydraulic schematics in Group 10.
;
HYDRAULIC
SYSTEM OIL LEAK
CHECK
Check hydraulic oil
level, condition and
viscosity.
M49199 -UN-07APR95
Inspect control valve,
cylinders, lines, hoses
and fittings for external
hydraulic oil leakage.
NOTE: 318 Shown
OK: GO TO
‘
NOT OK: Repair or
replace, then GO TO
‘
MX,159027005,1 -19-24APR95
MX,159027005,2 -19-24APR95
Group 05
Hydraulic System Checkout
TM1590 (17MAY95)
270-05-1
316, 318 & 420 Lawn and Garden Tractors
020895
270
05
1