SECTION 3 - HYDRAULIC SYSTEM SERVICE
page 3-3
DANGER!
CAUTION!
Cylinder in Vise
202035M1
HYDRAULICS
After hydraulic repair or maintenance, bleed the
air from the hydraulic system. Air in the system
could cause a loss in pressure. This loss in
pressure could cause the wings to fall
unexpectedly causing death or serious injury.
Stand clear of the machine when the hydraulic
cylinders are being extended and retracted.
ESCAPING HYDRAULIC FLUID IS A SERIOUS
HAZARD. Escaping hydraulic fluid that is under
pressure can penetrate the skin causing serious
injury. Relieve pressure before disconnecting the
hydraulic lines. Do not over-tighten swivel
connections. Check/tighten all connections
BEFORE activating hydraulics.
IMPORTANT: Use a thread sealant on male to female pipe thread connections only. Do not use a thread
sealant on O.R.B. or swivel connections.
HYDRAULIC CYLINDER SEAL REPLACEMENT
REMOVE CYLINDER FROM DRILL
IMPORTANT: The procedure shown is for the wing lift cylinders on the drill. Subbar cylinder repair is similar.
Refer to the subbar cylinder diagrams for location of seals etc. Note that the subbar cylinders
do not have tie rods.
1. Make sure the implement is fully lowered into field
position and the openers are resting on the ground.
Stop the tractor engine and move the tractor hydraulic
remote lever back and forth several times to relieve
pressure in the system.
2. Clean the areas on and around the cylinder, near the
fittings that attach the lines or hoses to the cylinder.
3. Remove all fittings and drain the oil from the cylinder.
Loosen the lines slowly to allow the release of any
residual pressure. Plug the hoses and fittings.
4. Remove the cylinder from the drill.
5. Remove all fittings and drain the oil from the cylinder.
6. Block the cylinder (1) in a vise (2) using wooden
blocks (3) or other material to protect the cylinder rod
from damage.
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