Table of Contents
Advertisement
www.WorkshopManuals.co.uk
Section E
60 - 5
Removal and Replacement
Variable Flow
! 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 Pressure
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
Sideshift the carriage to one side as shown (sideshift
machines only). Lower the backhoe and loader end to
the ground and stop the engine.
2
Operate the valve block levers back and forth to vent
residual pressure.
3
Remove the hose guide A (this makes access to the
valve block easier).
3
Remove clevis pins B to disconnect the control levers
from the valve block spools.
4
Disconnect all hydraulic hoses from the valve block and
plug all orifices to prevent ingress of dirt. Label each
hose before disconnecting, this will ensure correct
position when refitting.
Insert two M10 bolts through the eye end spools (three
5
spools each end) as shown. Make sure the bolt has a
retaining nut on each end. When the bolts are in place
thread suitable slings around the bolts as shown.
! CAUTION
This component is heavy. Do not attempt to remove it
unless its weight is held by a sling. Make sure that the
sling is attached to a suitable lifting appliance.
HYD 2-3/1
7
Remove nut s C and low er t he valve b loc k t o t he
ground.
9803/3280
Hydraulics
Excavator Valve
Purchased from www.WorkshopManuals.co.uk
Inspection
Inspect the resilient mounts for damage, cracking etc. If the
mounts are suspect, then replace them with new ones.
Replacement
Replacement is a reversal of the removal sequence.
Hoses and pipes (when applicable) must be re-connected
and p hased in sam e p o sit io n as rem o val. Ref er t o
Dismantling and Assembly, Hoses and Pipes.
! 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 replacement check the auxiliary relief valve (A.R.V.)
pressure settings.
Note: All hydraulic adapters that are installed together with a
bonded sealing washer must also have JCB Threadseal
applied to the threads of the adapter.
Section E
60 - 5
Issue 1
Advertisement
Table of Contents
