38 - 2
Boom - Removal and Replacement
Removal
The procedures describe the removal of the boom with the
boom and dipper rams still installed. If required, these items
can be removed separately before removing the boom, 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 from the bulkhead plate
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 Remove the dipper, see Dipper - Removal and
Replacement.
7 Wrap a sling around the boom as shown at D. Make
sure the weight of the boom is held by the sling before
removing pivot pins etc.
8 Place a suitable support underneath the boom ram C.
9 Remove two thin nuts E, bolt F and pivot pin G.
10 Remove heavy duty circlip H, spacers J (one fitted each
side) and pivot pin L. Mark the spacers so that they can
be replaced in the same positions.
11 Hoist the boom clear of the kingpost assembly.
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 pivot pin G 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 boom to the kingpost assembly, make sure
that spacers J are refitted in their original positions.
Replace all pivot pin seals as required.
Section B Body & Framework
9803/3280
Section B
38 - 2
Issue 1
Boom and Dipper
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