jcb 540-170, Руководство по обслуживанию

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Section 2-2 - Care and Safety
General Procedures
Venting Hydraulic Pressure
2-2-7 2-2-7
9803/3750-05 (2-02-01)
Venting Hydraulic Pressure
!M
WARNING
Hydraulic Pressure
Hydraulic fluid at system pressure can injure you.
Before disconnecting or connecting hydraulic hoses
or couplings, vent the pressure trapped in the hoses in
accordance with the instructions given in this
publication.
HYD-1-5
Important: This procedure is only to be used before
disconnecting hydraulic hoses. Before removing other
hydraulic components refer to the correct Removal
procedure.
1 Park the machine and make it safe.
K
Parking the
Machine and Making it Safe (
T
2-2-3) .
2 If necessary install the boom safety strut.
K
Boom
Safety Strut (
T
2-2-4) . Stop the engine.
3 Carefully remove the hydraulic tank filler cap and vent
the hydraulic pressure as follows:
a For manually operated services, operate the
controls of the service to be disconnected.
b For electrical and pilot operated services, turn the
starter key to the ON position but DO NOT start
the engine.
Operate the controls of the service to be
disconnected.
Note: Make sure that the pressure is vented correctly.
Electrical and pilot services have a small quantity of
accumulated pressure available for venting.
4 Refit the hydraulic tank filler cap.
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