jcb 1CX, Service Manual

Page: 177 / 242

16 - 1
Check Valve
The check valve consists of a plug A, plus a poppet and
spring B in a body C.
Opening pressure is 5 bar (75 lbf/in 2 ).
To check the opening pressure, compare the difference
between the recorded pressures at the MRV test point and
the brake pressure test point. These should be checked with
the hydraulic oil at correct working temperature, the seat
facing forward and the engine running at 1000 rev/min. The
difference in the two pressures should equal the opening
pressure of the check valve.
To adjust the opening pressure, screw plug A in or out of the
body C as required.
If the valve is damaged or worn replace as a unit. Do not fit
parts from other valves.
Section E Hydraulics
9803/8550
Section E
16 - 1
Issue 2*
Valves
*
S205100
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