SkyTrak 6036 Operation Manual - Manual (Page 93)

Page 87 6036/6036T
Loosen the retainer nut on each cartridge and turn
the adjusting screws in (clockwise) until they
bottom out. Doing this will render each counter-
balance valve inoperative.
2. Remove the blocking that is supporting the boom.
3. Clear the area around the vehicle of all personnel.
4. Move the boom control lever forward to lower the
boom.
OA0552
Figure 63
RETAINER NUT
ADJUSTING SCREW
BOOM HOIST CYLINDERS
COUNTERBALANCE VALVE
IMPORTANT: This procedure is to be used in emergency
situations only. By turning the counterbalance cartridge
adjusting screws to make the valve inoperative, the
pressure settings of the cartridge have been altered.
DO NOT attempt to reset these cartridges. Remove and
replace all three cartridges with new parts. Failure to
replace these cartridges with new parts will result in
erratic (extreme bouncing) lowering action, which may
cause damage to other components.
B. Hydraulic Line Failure:
Warning
In the event of a hydraulic line failure in any of the boom
control circuits, extreme CAUTION must be taken when
attempting to lower an elevated load. Hydraulic oil under
high pressure will escape through the fault in the line
which may result in the boom retracting or lowering at a
rapid rate. DO NOT perform this procedure unless you
are absolutely sure of what you are doing. Consult your
local JLG Distributor or the JLG Service Department
before proceeding if you are uncertain about any of the
following procedures.
Procedure continued on next page...