Hitachi 312350E Starting Pump, If the Pump Leaks at the Fluid Fittings, Shutdown

Operation

Starting Pump

1.Turn on hydraulic power supply.

2.Open return line shut-off valve (H) first, then slowly open the hydraulic supply shut-off valve (L).

3.Adjust flow control valve (Q) to limit the hydraulic flow to no more than 3 gpm (11 lpm), which is approximately 60 cycles per minute.

4.Adjust pressure reducing valve (N) to increase hydraulic inlet pressure from 50 to 600 psi (0.34 to 4.1 MPa, 3.4 to 41 bar).

•Increasing inlet pressure, increases outlet pres- sure.

•Decreasing inlet pressure, decreases outlet pressure.

5.Open drain valve while priming pump.

6.When pump is primed, close drain valve.

Always use lowest pressure possible to obtain desired results. This reduces pump wear.

Maximum Working Pressures

To reduce the risk of serious injury, including fluid injection and splashing in the eyes or on the skin, which may be caused if a component ruptures:

•Never exceed 600 psi (4.1 MPa, 41 bar) Maxi- mum Hydraulic Pressure to the reciprocator.

•Never exceed 7500 psi (51 MPa, 517 bar) Maxi- mum Outlet Pressure from the displacement pump.

•Accessories added to the pump fluid outlet side should have at least a 7500 psi (51 MPa, 517 bar) Maximum Working Pressure.

•Read and understand COMPONENT RUP- TURE HAZARD instructions, page 7.

If the Pump Leaks at the Fluid Fittings

Tighten fittings (1, 5, 60) which are self-sealing and have replaceable o-rings. If leaking persists, change o-rings.

sealing

fitting (1, 5, 60)

reciprocator

o-ring

(1a, 5a,60a)

ti04478

FIG. 4

Shutdown

Relieve pressure, page 7, whenever you shutdown.

8 312350E