Dake Corporation
1809 Industrial Park Dr
Grand Haven, MI 49417
933672
6
REV032022
MAINTENANCE
LUBRICATION
•
Keep all working parts of the press well-oiled for easier operation.
•
Keep a light film of oil over the entire surface of the ram to prevent rust.
REPLACING HYDRAULIC OIL
Recommended to replace hydraulic oil every 6 months of machine use.
*Amount needed may vary dependent on machine use*
TROUBLESHOOTING
CAUTION:
A. Oil Leaks around the Piston
1. Oil above the piston leather: If rated stroke of the press is exceeded repeatedly by running
the piston past rated stroke, bypass hole in the side of the cylinder run bypass line that
connects above the piston leather. Eventually enough oil may accumulate so that when the
piston is raised to the top of it’s stroke, oil is forced out between the piston and piston guide.
This can be remedied by disconnecting the bypass tube line from the cylinder, then raising
the piston slowly, about 2-1/2” less than it’s rated stroke (rated stroke: 18”) allowing the oil
above the piston cap to overflow out the bypass hole into a clean bucket. Replace tube line.
Oil may be put back into reservoir by removing the fill plug on the top of the reservoir.
B. Press does not hold pressure
1. Loosen tube connections, check all connections and tighten any loose tube nuts.
2. Dirt under release ball.
Too correct this condition, remove the release valve rod packing nut, packing, and ball. Clean
out the valve seat, reseat the valve ball using brass rod as a drift, tapping lightly.
Reassemble valve.
If this occurs frequently, the oil should be drained from the reservoir, then flush the reservoir
to remove any dirt or contaminants. Refill reservoir with mobile DTE 26 or equivalent
hydraulic oil. Oil must be filtered carefully to removed and contaminants. Refill reservoir with
oil. See “SET UP” section of manual for instructions.
3. Worn leather cup
If neither of the previous conditions seem to be the cause of the pressure not holding the
piston leather may be worn or damaged. To inspect leather, remove the lower platen, then
remove cap screws that bolt the piston guide to the cylinder flange. Piston and piston guide
may be then listed out of the cylinder and inverted, the leather now can be inspected and
replaced in necessary. Reassemble the press, take care not to damage the lip of the leather
cup as it enters the cylinder.