Hydraulic Fold System - Landoll 7430 Series Operator's Manual

4-5 HYDRAULIC FOLD SYSTEM

4-5.1 The Vertical Harrow is equipped with a
hydraulic fold system to raise and lower the
wing frames for narrow transport.
4-5.2 Be sure the system is fully charged with
hydraulic oil before attempting to fold/unfold
the unit. Air in the system can allow uncon-
trolled dropping of the wing frames causing
serious personal injury or machine damage.
The system needs to be charged with oil ini-
tially and any time the system has been
opened for repair such as cylinder, hose, or
fitting replacement/repair.
4-5.3 To charge the system, carefully hitch
the Vertical Harrow to the tractor. Unpin the
end(s) of the fold cylinders, and position
them so they can extend and retract without
contacting any frames or other parts. Check
the tractor hydraulic fluid level to make sure
it is full of the manufacturer's recommended
hydraulic fluid. Connect the cylinder hoses to
the tractor and fully extend and retract the
cylinders several times. The cylinder rod
travel should be smooth and positive when
all air has been purged from the system.
Due to large amounts of hydraulic oil re-
quired, recheck the tractor fluid level to make
sure it is within proper operating limits.
4-5.4 The hydraulic fold system is equipped
with restrictors in the rod end of cylinders to
prevent uncontrolled falling of wing frames
when unfolding. Removal or improper as-
sembly of these restrictors can cause the
machine to fold improperly and result in seri-
ous machine damage.
WARNING
ESCAPING HYDRAULIC FLUID CAN
CAUSE SERIOUS PERSONAL INJURY.
RELIEVE SYSTEM PRESSURE BE-
FORE REPAIRING, ADJUSTING, OR
DISCONNECTING. WEAR PROPER
HAND AND EYE PROTECTION WHEN
SEARCHING FOR LEAKS. USE CARD-
BOARD INSTEAD OF HANDS (SEE FIG-
URE 4-2). KEEP ALL COMPONENTS
(CYLINDERS, HOSES, FITTINGS, ETC.)
IN GOOD REPAIR.
4-5