0 installation 4.1 connecting the pump, 2 pump venting, 3 pump position – Enerpac P-Series User Manual

Page 4

3.3 Models P-462 and P-464

Figure 3 and the table below show the main features
of hand pump models P-462, for use with single-
acting cylinders, and P-464, for use with double-
acting cylinders.

Figure 3, Models P-462, P-464

3.4 Models P-25, P-50, and P-51

Figure 4 shows hand pump models P-25 and P-50,
both of which are equipped with a handle that
operates in both directions. Figure 5 shows the P-51
hand pump. The main components of these pumps
are listed in the table below.

Figure 4, Models P-25 and P-50

Figure 5, Model P-51

4.0 INSTALLATION

4.1 Connecting the Pump

1. Thread hose into pump outlet. Use 1 1/2 wraps of

Teflon tape (or suitable thread sealant) on hose
fitting, leaving the first complete thread free of tape
to ensure that tape does not shed into hydraulic
system, causing damage. Trim loose ends.

2. Install a pressure gauge in-line from the pump for

added safety and better control.

3. Connect the hose(s) to your cylinder or tool.

NOTE: For single-acting cylinders, connect one
hose from the pump to the cylinder. For double-
acting cylinders, connect two hoses. Connect
one hose from the pressure port of the pump to
the pressure port of the cylinder. Connect another
hose from the retract port of the pump to the
retract port of the cylinder.

4.2 Pump Venting

See table below to determine if your pump should be
operated with a vented or non-vented reservoir.
Vented pumps provide slightly better performance.
For pumps with nylon reservoir, turn vent/fill cap 1/4
turn counter-clockwise to vent. For other pumps, see
decal on pump. Close vent prior to transporting
pump to prevent oil leakage. P-80, P-801, and P-84
are vented by turning the valve counterclockwise. To
close the vent, turn the valve clockwise.

4.3 Pump Position

See table below to determine the correct operating
position for your pump, horizontal or vertical. The P-80,
P-801, and P-84 cannot be vented when operated vertically.

OPERATING POSITION

EHF-65 . . . . . . . . . either
P-18 . . . . . . . . . . . either
P-25 . . . . horizontal only
P-39, 1003 . . . . . . either
P-50 . . . . horizontal only
P-51 . . . . horizontal only
P-80, 1006 . . . . . . either
P-84 . . . . . . . . . . . either
P-141, 1001 . . . . . either
P-142, 1002 . . . . . either
P-142AL . . . . . . . . either

P-202 . . . . . . . . . . either
P-391, 1004 . . . . . either
P-77 . . . . . . . . . . . either
P-392, 1005 . . . . . either
P-392AL . . . . . . . . either
P-462 . . . horizontal only
P-464 . . . horizontal only
P-801 . . . . . . . . . either
P-802 . . . . . . . . . . either
P-842 . . . . . . . . . . either

VENTING OPTIONS

EHF-65 ..........non-vented
P-18 ...............non-vented
P-25 ........................either
P-39, 1003 .....non-vented
P-50 ........................either
P-51 ......................vented
P-80, 1006 ..............either
P-84 ........................either
P-141, 1001 ............either
P-142, 1002 ............either
P-142AL.........non-vented

P-202 ......................either
P-391, 1004 ............either
P-77 ......................vented
P-392, 1005 ........... either
P-392AL ................vented
P-462 ....................vented
P-464 ....................vented
P-801 .............non-vented
P-802 ......................either
P-842 ......................either

Table 4 and 5

Fig. 4 & 5 P-25

P-50

P-51

Release Valve Release Valve Release Valve

1/4 NPTF

Outlet Port

Vent/Fill Cap

Table 3

Fig. 3

P-462

P-464

3-Way 2-Position Valve

4-Way 3-Position Valve

3/8 NPTF Outlet Port

Vent/Fill Plug

Handle Clip