Jackco Model 840 w/ Hydraulic Hose - Manual (Page 4)

RELEASE VALVE ADJUSTMENT PROCEDURE
• Attach pump to its air source.
• Turning counterclockwise to loosen Allen-head screw by two full turns.
• Turning counterclockwise back out slotted-head release valve two full turns.
• Lift treadle at air inlet end and place your thumb under the treadle on top of the air valve
button as illustrated.
• Using your thumb press down on the air valve button and actuate the pump to build up
pressure in the hose. Hose will become stiff under pressure.
• Turn slotted-head release valve clockwise gently until you feel the valve seat against the
internal ball. Excessive tightening will cause loss of pressure in hose.
• Keep the thumb under treadle to obtain proper operating clearance between the treadle, air
valve and release valve. Turn Allen-head screw clockwise and tighten firmly to lock valve
adjustment.
• Release valve should now be correctly adjusted to operate the pump properly.
MAINTENANCE
Use only recommended JACKCO hydraulic oil with theses pumps to promote long pump life
and protect your warranty. Contact your JACKCO representative for more information on these
products and their applications.
KEEPING OIL LINES CLEAN
When coupler halves are disconnected, always screw on dust caps. Use every precaution to
guard unit against entrance of dirt because foreign matter may cause pump, cylinder or valve
failure.
CHANGING THE OIL
• Drain all oil and refill with clean JACKCO hydraulic oil every 12 months, if pump is used in
dirty environments, change the oil more often.
• Remove vent/fill cap or plug from reservoir
• Tilt pump to drain out old oil.
• Fill reservoir only to level mark shown on pump
• Replace the vent/fill cap or plug.
• Dispose of used oil properly.
AIR SUPPLY
• To obtain maximum performance and rated hydraulic pressure, air pressure should be 100
psi minimum.
• To insure trouble-free performance, your air supply equipment should be equipped with an air
filter/dryer and the compressor tank should be drained of water everyday.
LUBRICATION
• To insure long service life, add a few drops of # 30 oil into the air inlet once a week.