Metso MP1000, Technical Reference Manual

Page: 141 / 180

SECTION 3 - M. FRAME, ADJ. RING, TRAMP REL. & CLRNG JACK ASSY
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
3-23
1. Lock out and tag all electrical power
supplied to the power unit and Crusher and
depressurize the clamping and tramp release
circuits by opening the clamping cylinder
and tramp release cylinder needle valves
located on the side of the hydraulic power
unit at the hose connection area.
2. Verify that the pressure in the clamping and
tramp release circuits has been relieved by
confirming that the pressure reading on
pressure indicator/transmitter PIT-1 and
PIT-2 have both gone to zero.
3. Release the nitrogen gas pre-charge pressure
in the accumulator while the accumulator is
still mounted to the crusher following the
steps below. Even if you suspect that the
bladder has ruptured and all nitrogen gas has
escaped it is still recommended to go
through the procedure of releasing any
residual pressure left in the accumulator.
4. Remove the valve guard from the bottom of
the accumulator and then the valve cap from
the gas valve stem as shown in Figure 3-17.
Figure 3-17 Depressurizing the Accumulator
Bladder
5. Obtain the charging and gauging assembly
furnished with the special tools.
The charging assembly is required to
connect the gauging assembly to a nitrogen
bottle in order to increase the pre-charge in
the accumulator to the proper pressure. It
consists of a 3 m (10 ft.) length of hose
attached to a swivel connector on one end
and a gland nut and gland on the other end.
Callout Description
1 Valve guard
2 Valve cap
3 Accumulator
4 Gas valve stem
5 Swivel
6 Air valve/dust cap
7 T-handle
8 Pressure gauge
9 Tank valve
10 Bleeder valve
2
1
4
3
To Nitrogen
1000
300
0
25
00
20
00
1500
50
0
0
8
7
10
Bottle
6
9
5