Dake Elecdraulic - 905 series - Manual (Page 3)

Model 5-025, 5-050, 5-075 & 5-150 3
3. If nothing happens when press is operated.
a. If motor does not run, the electrical circuit should be investigated.
b. Release valve open. Be sure to have release valve firmly closed when using press.
c. If the ram will come down only a fraction of its rated stroke, check the oil level in the reservoir
with the ram at the top of its stroke. It should be visible in the sight window at the side of the
reservoir.
d. Eductor nozzle plugged. If motor labors and ram does not move when pump control know is
turned, the orifice in the eductor nozzle (item 73) may be plugged. Drain reservoir, remove tube
assembly (Item 123), eductor bushing (item 70), eductor body (item 72), and eductor nozzle
(Item 73). Clean out orifice with a 1/32” drill. Replace parts being sure not to install item 72
backwards. See parts drawing. Check O-ring and back-up washer (items 71A &71B) to be sure
it has not been damaged.
4. If press is operating slow.
a. Improper oil. It is essential that the recommended oil (Mobil DTE 24 or equivalent) be used.
Heavier oils cause a marked reduction in the ram speed. NOTE: DO NOT USE HYDRAULIC
JACK OIL!
b. Release valve not closed properly. Release valve must be firmly closed when using the press.
c. The seal on the piston rod for the 50-101 pump is worn. A worn seal will pull air into the pump
causing the pump to slowly loose its prime. To test, place grease around the control rod where
it goes in and out of the seal (Item 129). Then replace seal part number 26573.
d. The piston rod for the 50-101 pump is bent or rusted. Contact factory for rebuilding your pump.
CAUTION: Adjustments to pump are not necessary and the pump should not be tampered with
because expensive repairs may result.
WARNING! High pressure fluid is present in operational hydraulic systems. Fluids under high
pressure are dangerous and can cause serious injury or death. Do not make modifications, repairs or
adjustments to any hydraulic system unless you are competent or working under competent
supervision. If in doubt, consult a qualified technician or engineer.