SEN01053-01 50 Disassembly and assembly
10 PC800, 850-8
Removal and installation of
cooling assembly 1
Removal
k Lower the work equipment to the ground
and stop the engine.
k Loosen the cap of the hydraulic tank gradu-
ally to release the internal pressure of the
hydraulic tank.
k Disconnect the cable from the negative (–)
terminal of the battery.
k In the case that you do not drain the cool-
ant, if you disconnect the heater hose when
the coolant temperature in the radiator is
high, you may be scalded. In this case, wait
until the coolant temperature lowers and
then disconnect the heater hose.
k Collect the air conditioner refrigerant
(R134a) from the air conditioner circuit in
advance.
a Ask professional traders for collecting and fill-
ing operation of refrigerant (R134a).
a Never release the refrigerant (R134a) to the
atmosphere.
k If refrigerant gas (R134a) gets in your eyes,
you may lose your sight. Accordingly, put
on protective goggles while you are collect-
ing the refrigerant (R134a) or filling the air
conditioner circuit with the refrigerant
(R134a). Collecting and filling work must be
conducted by a qualified person.
a Before disconnecting each hose, mark it with a
tag etc. to indicate its position.
a Install oil stopper plugs to the disconnected
tubes and hoses.
1. Remove the counterweight assembly. For
details, see “Removal and installation of coun-
terweight assembly”.
2. Remove undercover (1).
3. Remove the hydraulic tank strainer and stop
the oil with tool S1.
a When not using tool S1, remove the drain
plug and drain the oil.
6 Hydraulic tank: Approx. 470 l
4. Drain the coolant.
6 Coolant: 100 l
5. Remove front and rear covers (2) and (3).
6. Open engine hood (4).
a Open the rear side, too.
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