38 - 4
Dipper - Removal and Replacement
Removal
The procedures describe the removal of the dipper with the
extradig (if fitted) and the bucket ram still installed. If
required, these items can be removed separately before
removing the dipper, refer to the appropriate removal and
replacement procedure.
1 Remove the backhoe bucket and place the backhoe in
the position shown at A.
2 Lower the stabilisers.
3 Stop the engine and disconnect the battery (to prevent
the engine being started).
4 Operate the backhoe control levers back and forth
several times to release pressure trapped in the
hydraulic hoses.
!
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
5 Disconnect the hydraulic hoses, as shown at B. Always
label hydraulic hoses before disconnecting them, this
will ensure that they are correctly reconnected. Plug
and cap all hose open ends to prevent ingress of dirt
and loss of hydraulic fluid.
6 Place a suitable support underneath the dipper ram as
shown at C.
7 Wrap a sling around the dipper as shown at D. Make
sure the weight of the dipper is held by the sling before
removing pivot pins etc.
8 Remove nut E, bolt F and pivot pin G.
9 Remove two thin nuts H, bolt J and pivot pin K.
Note: It is important to use two thin nuts, this arrangement
allows the pivot pin retaining bolt to be secured without
inducing a lateral tension.
10 Hoist the dipper clear of the boom.
Replacement
!
WARNING
Hydraulic Fluid
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
Replacement is generally a reversal of the installation
procedure.
The boom to dipper pivot pin K must be retained using two
M12 thin nuts. Fit the first thin nut with zero torque, fit the
second thin nut and torque to 98Nm (72 lbf ft).
When fitting the dipper to the boom, make sure that shim,
item L is installed as shown.
Replace all pivot pin seals as required.
Section B Body & Framework
9803/3280
Section B
38 - 4
Issue 1
Boom and Dipper
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