Hose Burst Protection Valves Removal And Replacement - jcb 214e Service Manual

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Section E
70 - 1
Removal and Replacement
! WARNING
Make the machine safe before working underneath it.
Park the machine on level ground, lower the arms. Apply
the parking brake, put the transmission in neutral and
stop the engine. Chock both sides of all four wheels.
Disconnect the battery, to prevent the engine being
started while you are beneath the machine.
GEN-1-2
! DANGER
Hydraulic fluid at system pressure can injure you. Before
disconnecting or connecting hydraulic hoses, stop the
engine and operate the controls to release pressure
trapped in the hoses. Make sure the engine cannot be
started while the hoses are open.
INT-3-1-11/1
Removal
1 Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the backhoe and loader end to the ground and
stop the engine.
Note: Refer to Service Procedures, Hose Burst Protection
Valves, Lowering a Load - In a Failure Condition for
lowering a load with engine failure or a burst hose.
2 Turn the manual over-ride screw fully clockwise.
3 Operate the main service control levers back and forth
to vent residual pressure. For instance, if the HBPV is
fitted on the boom or dipper then operate the backhoe
control levers. If the HBPV is fitted on the loader arms
then operate the loader control levers.
323590
9803/3280
Hydraulics
Hose Burst Protection Valves
A
Purchased from www.WorkshopManuals.co.uk
Disconnect all hydraulic hoses from the HBPV and plug
4
all orifices to prevent ingress of dirt. Label each hose
before disconnecting, this will ensure correct position
when refitting.
5 Undo the retaining clips A and remove the HBPV.
Replacement
Replacement is a reversal of the removal sequence.
! WARNING
Fine jets of hydraulic fluid at high pressure can
penetrate the skin. Do not use your fingers to check for
hydraulic fluid leaks. Do not put your face close to
suspected leaks. Hold a piece of cardboard close to
suspected leaks and then inspect the cardboard for
signs of hydraulic fluid. If hydraulic fluid penetrates your
skin, get medical help immediately.
INT-3-1-10/1
After refitting the valve to the machine, ensure that the valve
operates correctly, refer to Service Procedures, Hose
Burst Protection Valves - Checking.
A
Section E
70 - 1
A
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Issue 1