jcb ROBOT 150, Service Manual

Page: 209 / 254

16 - 13
Pressure Testing - Main Relief Valve
(M.R.V.) - In Situ
Connect a 0 - 400 bar (0 - 6000 lb/in
2
, 0 - 422 kg/cm
2
)
pressure gauge to test connector A located on the left-hand
end of the loader valve block.
With the engine running at maximum speed, check the
M.R.V. setting by raising or lowering the loader arm until the
rams are fully open or closed and noting the maximum gauge
reading.
Keep clear of the loader arm.
The maximum
pressure should be as stated in Technical Data .
If the pressure is incorrect, slacken locknut B and adjust
screw C . Turn it clockwise to increase pressure and anti-
clockwise to decrease the pressure. When the pressure is
correct, tighten the locknut.
Section E
Hydraulics
9803/8500
Section E
16 - 13
Issue 1
Valves
A A
S257841/1
C C
B B