John Deere 318 - Manual (Page 393)

Æ
STEERING SYSTEM
LEAKAGE TEST
Heat hydraulic oil to
43˚C (110˚F). See
‘
in
this group.
Start engine and run at
slow idle.
M49198 -UN-20DEC89
With wheels in a maximum right position, turn
steering wheel with a constant torque of 6.8 N·m
(60 lb-in.) for one minute.
LOOK: Count the revolutions.
RPM must not exceed 6.
M49197 -UN-20DEC89
With wheels in a maximum left position, turn
steering wheel with a constant torque of 6.8 N·m
(60 lb-in.) for one minute.
LOOK: Count the revolutions.
Rpm must not exceed 6.
6 RPM OR LESS:
STEERING SYSTEM
OK.
MORE THAN 6 RPM:
GO TO
Е
Е
STEERING VALVE
LEAKAGE TEST
N
CAUTION: TO
AVOID INJURY FROM
ESCAPING
HYDRAULIC OIL
UNDER PRESSURE,
RELIEVE THE
PRESSURE IN THE
SYSTEM BY
STOPPING THE
ENGINE AND
OPERATING ALL
HYDRAULIC
CONTROL VALVES.
M49196 -UN-20DEC89
Remove cap nut on left front side of fender deck
and raise fender deck to access hydraulic lines.
(Fender deck is removed in photo only for clarity
of procedure.)
Disconnect hydraulic lines at fittings (A) and plug
fittings (A) with JT03391 Plugs.
Start engine and run at slow idle.
M49198 -UN-20DEC89
With wheels in a
maximum right position,
turn steering wheel with
a constant torque of 6.8
N·m (60 lb-in.)
LOOK: Count the
revolutions.
RPM must not exceed
6.
M49197 -UN-20DEC89
With wheels in a
maximum left position,
turn steering wheel with
a constant torque of 6.8
N·m (60 lb-in.)
LOOK: Count the
revolutions.
RPM must not exceed
6.
6 RPM OR LESS:
STEERING VALVE OK:
Replace steering
cylinder.
MORE THAN 6 RPM:
Remove and repair
steering valve. (See
Section 60.)
MX,159026015,12-19-27MAR95
MX,159026015,13-19-27MAR95
MX,159026015,14-19-27MAR95
MX,159026015,15-19-27MAR95
Diagnosis, Tests and Adjustments/Steering Valve Leakage Test
TM1590 (17MAY95)
260-15-5
316, 318 & 420 Lawn and Garden Tractors
020895
260
15
5