4
6.4 4-Way Valve Operation:
See illustration 10.
a) Listed below are the valve positions and operations:
1 - Flow to Port “B”, Port “A” returns flow to tank
2 - Neutral, Ports “A” and “B” are blocked
3 - Flow to Port “A”, Port “B” returns flow to tank
b) After shifting the valve, depress the treadle to start the pump.
This will direct flow to Port A or Port B, depending on the handle’s
position. Releasing the treadle will stop pump flow.
NOTE:
To prolong pump and cylinder life, DO NOT continue to
operate pump after cylinder is fully extended or retracted.
6.5 Treadle Operation (PAMG, PANG, and PAQG models
only):
See illustration 11. The treadle can be operated in a momentary
or maintained mode. For momentary operation, press the treadle
to run the pump and release the treadle to stop the pump. For
maintained operation, use the locking pin (A) to hold the treadle
down. To lock the treadle:
a) Press and hold the treadle.
b) Press locking pin and hold while releasing treadle.
c) Press treadle briskly to release locking pin and stop pump.
6.6 Pendant Operation (PARG model only)
a) To Advance Cylinder:
Depress the “ADV” button on the
pendant and the pump will start to pump hydraulic oil into the
system.
b) To Hold the Cylinder Position:
The pump will stop and hold
pressure when neither of the buttons are depressed.
c) To Retract Cylinder:
Depress the “RET” button on the
pendant. To stop the cylinder from retracting, release the button.
6.7 Priming
Priming of the hydraulic pump is normally not required. If the air
motor runs very fast, but no hydraulic pressure is built, the pump
may have lost its prime. This pump can lose prime if it is run
completely out of oil or if an air bubble is trapped in the pumping
chamber. An air bubble could occur during shipment, or when the
shipping plug is removed while the pump is held in the vertical
(shipping plug up) position.
a) Place the pump on a flat, horizontal surface. Remove the
shipping plug. Attach an approved 10,000 psi rated hydraulic
hose and cylinder assembly to the hydraulic outlet 3/8” NPT
port. Torque fittings to 65-75 ft. lbs. (88-102 Nm).
b) Attach air supply to the 1/4” NPT swivel connection. Torque
to 20-25 ft. Lbs (27-34 Nm.).
c) Fill pump with Enerpac Hydraulic Oil, 32 cSt hydraulic oil.
d) Prime the pump with air pressure set to 30-40 psi. If air
pressure is different than 30-40 psi follow the procedure below:
e) ON MODELS WITH TREADLE: While holding the treadle
down firmly in the RELEASE position, slowly depress the
PRESSURE button located under the toe of the treadle near
the air supply fitting. Try to get the air motor to operate one
or two cycles at a time. Slowly depressing the PRESSURE
button will allow you to “throttle” the inlet air pressure
f) Pressing the operating buttons in this manner effectively
draws oil through the intake tube to refill the pressure
chamber. You may need to hold the treadle and “throttle”
the PRESSURE button for a few minutes to completely
remove the air and prime the pump models with an air
pendant, hold “RET” button down while cycling
g) ON MODELS WITH 4-WAY VALVES: Shift valve to neutral
position, press the treadle, and run the pump momentarily
several times.
h) On models with an air pendant, hold “RET” button down
while cycling “ADV” button momentarily several times.
i) To verify that the pump is primed, operate as normal with
cylinder attached. If cylinder does not advance, repeat step
6.7g or 6.7h.
6.8 Pressure Adjustment
To obtain less than maximum hydraulic pressure, either install
an Enerpac V-152 adjustable relief valve in the system or limit
the inlet air pressure. When limiting the inlet air pressure, pump
will slow down and stall as the hydraulic pressure increases. To
obtain a stall-out pressure, lower the inlet air pressure until the
pump stalls below the desired hydraulic pressure and increase air
pressure until the desired hydraulic pressure is reached. Repeat
pump operation to verify the stall-out pressure.
NOTE:
10,000 psi TURBO II pumps were not designed for stall
to restart applications. The seals on the pump will not ensure
the pressure drop accuracy required for effective stall to restart
operation.
7.0 MAINTENANCE
7.1 Maintaining Proper Oil Level
Check the oil level of the pump prior to start-up, and add only
ENERPAC hydraulic oil, if necessary, by removing the vent/fill
assembly (see instructions in Section 5.6).
7.2 Cleaning The Muffler
Clean the muffler every 250 hours, or more frequently if pump
is used in dirty environments. On PATG Models, first remove 2
shoulder bolts
(A)
and treadle
(B)
. See Illustration 12. To expose
the muffler, remove 2 screws
(C)
holding down muffler plate. See
illustration 13. Wash muffler element in soapy water, dry, and
reassemble, installing screws hand tight.
7.3 Changing The Oil
Change the oil every 250 hours. The vent/fill assembly serves as
a drain plug for use when changing oil. Refill pump with Enerpac
hydraulic oil. Dispose of used oil properly, in accordance with all
applicable laws and regulations.
7.4 Cleaning The Air Inlet Filter
Remove the swivel air connector by removing the two cap screws
and pulling air filter out of cavity. Using an air nozzle blow debris
off filter. (Always use proper eye protection). Re-install filter and
swivel connector. Torque cap screws to 16-18 in.lbs [1,8-2,0 Nm].
8.0 TROUBLESHOOTING
Only qualified hydraulic technicians should service the pump or
system components. A system failure may or may not be the
result of a pump malfunction. To determine the cause of the
problem, the complete system must be included in any diagnostic
procedure. The following information is intended to be used only
as an aid in determining if a problem exists. DO NOT disassemble
the pump. For repair service, contact the Authorized ENERPAC
Service Center in your area.
