Atlas™ Manual 15T and 25T Hydraulic Press
15
Note:
If the applied tonnage load set at the load gauge (
31
) drops by
more than one ton over a 15 minute period, this
may indicate
that there is a fault in the system for holding the applied
pressure, rather than from any relaxation in the work being
pressed. The press system may require bleeding of any trapped
air in the oil to function correctly. (See Fault Finding, Causes and
Remedy, Section 6, page 20.)
To release the load on the work turn the pressure release handle (
30
)
anticlockwise,
slowly
, by about one complete rotation. (There is no
need to turn this handle completely open.) Slow rotation of the release
handle (
30
) allows for a gradual and controllable release of the
pressurised oil within the system (indicated by a gradual drop of the
applied tonnage load at the load gauge (
31
)), to drain back into the oil
reservoir and helps to reduce the possibility of any bubbles that might
form in the oil from a rapid release of pressure.
Control of a Maximum Applied Load
Beneath the pressure gauge (
31
) there is a pressure relief valve
assembly (
66 to 72
) which may be set so that any load between 0-15
tons or 0-25 tons is the maximum load that can be obtained.
(See Fig 7.) The relief valve set knob (
69
) can be rotated clockwise to
increase the maximum pressure in the system, and hence the applied
load, or rotated anticlockwise to decrease the pressure in the system.
Note:
When supplied the pressure relief valve will be set for a 10 ton
load on the 15 ton press and a 15 ton load on the 25 ton press.
To set a specific maximum load, first rotate the relief valve set knob
(
69
) anticlockwise until it is held loosely by a couple of screw threads.
(Be careful, as if you unscrew the knob completely the relief valve ball
bearing (
70
) held behind the knob (
69
) could fall out of position and be
lost. (If the ball bearing (
70
) does fall out just simply place it into the
knob (
69
) head recess and screw back into position.)
Place a piece of work to be pressed in the usual way, close the
pressure release handle (
30
) and start to pump. If the pressure relief
Содержание Atlas 15T
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