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Section E
25 - 1
Quick Release Couplings
- Connecting and Disconnecting
Flat face quick release couplings allow the operator to
remove and install attachments swiftly and efficiently.
Generally, your machine pipework will have female couplings
A fitted, and the optional attachment hoses will have male
couplings B fitted.
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, p lease read t he c orrec t fit t ing 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 t ry t o d ismant le t he c oup lings - t hey are non
serviceable parts. If a coupling is damaged it should be
replaced with a new one.
9803/3280
Hydraulics
Service Procedures
Purchased from www.WorkshopManuals.co.uk
! WARNING
Hydraulic fluid at pressure can injure you. M ake the
machine safe before connecting or disconnecting quick
release couplings; stop the engine and then operate the
attachment control a few times to vent residual hydraulic
pressure in the attachment hoses.
2-4-1-11
Before connecting or removing any hydraulic hose, residual
hydraulic pressure trapped in the service hose line must be
vented. This is usually achieved by switching off the engine
and then operating the attachment control lever several
times. Make sure the hose service line has been vented
b ef o re c o nnec t ing o r rem o ving ho ses - ref er t o t he
appropriate attachment information in this section.
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.
Make sure that ball C in the female coupling is located
3
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 the slot D.
Disconnecting Quick Release Couplings
1
Remove any residual hydraulic pressure trapped in the
service line hose.
2
Align the slot D with ball C.
3
Pull back sleeve E to release the coupling.
C
A
B
Section E
25 - 1
E
D
S169490
Issue 1
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