![background image](http://html1.mh-extra.com/html/jcb/js130/js130_service-manual_3610745221.webp)
4 - 9
Auxiliary Relief Valves (continued)
Boom Ram (continued)
Boom Down
5
Prepare the machine
Put the operator levers into neutral and lower the gate
lock lever. Start the engine and park the machine on
level ground. Operate the dipper out and lower the
boom to set the bucket on the ground. Stop the engine.
Release the hydraulic oil tank pressure. (See
Releasing
Tank Pressure
).
6
It is not physically possible to fully close the boom ram,
without lifting the undercarriage of the ground.
Therefore the ARV’s
B
and
C
must be swapped over.
a
Fully raise the boom and then continue to operate
the right control lever as at
A
.
b
The pressure gauge reading (Boom down) should be
compared to the technical data at the start of the
section. If it is outside the limits, adjust ARV.
7
Stop the engine and release the hydraulic pressure,
(see
Releasing Tank Pressure
). Remove the pressure
gauge and adaptor. The Relief Valves for Boom up and
Boom down must be swapped and returned to the
correct ports.
8
If further ARV tests are necessary carry out the relevant
procedures detailed in this section. If no further ARV
tests are required restore the MRV pressure setting to
its original value (see
Auxiliary Relief Valve
,
General
,
step 3).
9
Stop the engine and release the hydraulic pressure,
(see
Releasing Tank Pressure
). Remove the pressure
gauge and adaptor.
Section E
Hydraulics
9803/6410
Section E
4 - 9
Issue 1
Pressure Testing
306490
305511a
312460
X
X
Y
Y
A
A
A296530
B
B
C
C
Summary of Contents for JS130
Page 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Page 118: ......
Page 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Page 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Page 207: ......
Page 209: ......
Page 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Page 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...