jcb 1CX, Service Manual

Page: 64 / 242

Section A Optional Attachments
9803/8550
Section A
1 - 1 1 - 1
Issue 3*
Quick Release Couplings
*
Flat face quick release couplings allow the operator to
remove and install attachments swiftly and efficiently. The
attachment pipework has two male couplings fitted on the
loader arms and two on the backhoe. The attachment
hoses have corresponding female couplings fitted.
! !
WARNING
The external surfaces of the couplings must be clean
before connecting or disconnecting. Ingress of dirt will
cause fluid leaks and difficulty in connecting or
disconnecting. You could be killed or seriously injured by
faulty Quick Release Couplings.
2-4-1-15
The quick release couplings should be trouble free and
relatively easy to connect and disconnect, provided they are
kept clean and used correctly. The recommendations listed
below should always apply when using flat face quick
release couplings.
Finally, please read the correct fitting and releasing
procedures before installing or removing any optional
attachment fitted with quick release couplings.
Quick Release Couplings - Do's & Don'ts
DO wipe the two faces of the coupling and make sure they
are clean before connecting.
DO make sure the outside sleeve (female coupling) is pulled
back when disconnecting.
DO connect and disconnect a new coupling two or three
times to 'work' the PTFE seals - sometimes a new coupling
will stick if the seals have not been 'worked'.
DO use a spanner on the hexagon flats of the coupling when
fitting adaptors.
DO use a rubber or hide hammer to disconnect a coupling if
it sticks - sticking may occur if there is dirt present in the
coupling.
DON'T attempt to re-connect a damaged half coupling - this
will destroy the seals and necessitate replacing both half
couplings.
DON'T leave the coupling where it may be run over by a
machine or otherwise crushed - this will distort the coupling
sleeve and prevent correct connection and disconnection.
DON'T clamp on the smooth diameter of the coupling when
fitting adaptors - always use the hexagon.
DON'T try to turn the sleeve (female coupling) when the
coupling has been disconnected - the locking ball will
wedge underneath the sleeve and destroy the coupling.
DON'T damage the faces of the couplings - this can prevent
connection and disconnection, or damage seals and cause
leakage.
DON'T try to dismantle the couplings - they are non
serviceable parts. If a coupling is damaged it should be
replaced with a new one.
! !
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
Before connecting or removing any hydraulic hose, residual
hydraulic pressure trapped in the service hose line must be
vented (see Connecting/Disconnecting Hydraulic Hoses
on page E/2 - 1).
Connecting Quick Release Couplings
1 Remove any residual hydraulic pressure trapped in the
service line hose.
2 Wipe the two faces of the male and female couplings
and make sure they are clean.
3 Make sure that the ball C in the female coupling is
located in one of its slots.
4 Fit the male coupling into the female coupling. To
ensure that the coupling is not accidentally released,
rotate sleeve E half a turn and make sure that the
locking ball C does not align with slot D.
Disconnecting Quick Release Couplings
1 Remove any residual hydraulic pressure trapped in the
service line hoses.
2 Align slot D with ball C.
3 Pull back sleeve E to release the coupling.
169490
E
C
D
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