Removal And Installation Of Air Conditioner Unit Assembly - Komatsu PC200-8M0 Shop Manual

SEN06148-01
Removal and installation of air
conditioner unit assembly
k
Park the machine on a level ground, swing
the upper structure by 90 deg., lower the
work equipment to the ground stably, and
stop the engine.
k
Disconnect the cable from the negative (–)
terminal of the battery.
k
If you drain the coolant or disconnect the
heater hose when the coolant temperature
is high, you may be scalded. In this case,
wait until the coolant temperature lowers
and then drain the coolant or disconnect
the heater hose.
k
If refrigerant gas (R134a) gets in your
eyes, you may lose your sight. And if it
touches your skins, you may suffer from
frostbite. Accordingly, put on the protec-
tive eyeglasses, gloves and working suits
with long sleeves while you are collecting
or filling the refrigerant (R134a).
a Never release the refrigerant (R134a) to the
atmosphere.
a Ask a qualified person for collecting, adding,
and filling operations of the refrigerant (R134a).
a Note connector numbers and installed positions
before disconnecting wiring and hoses.
a Positions of the controllers are shown below.
q A: Pump controller assembly
B: Air conditioner controller assembly
q
q C: KOMTRAX terminal controller assem-
bly
26
50-700

Removal and installation of air conditioner unit assembly

Removal
1. Collect the refrigerant (R134a) from the air
conditioner circuit.
a Refrigerant to be collected:
725 ± 50 g
2. Drain the coolant.
6
Coolant: 20.3 l (PC200/200LC-8M0)
3. Pull up front window assembly (1) to the ceiling
and lock it.
a Make sure that the assembly is certainly
locked.
4. Remove front lower window (2).
5. Remove floor mat (3).
6. Remove box (8) (five bolts).
a Disconnect the hose located under box
(8).
7. Remove box (9) (three bolts).
a Be careful about connectors (10) and (11)
located behind box (9) (for machines
equipped with 12 V power socket).
q Connector (10): 12 V power socket inter-
mediate harness (M13A)
q Connector (11): 12 V power socket inter-
mediate harness (M13B)
700 Cab and its attachments
19.8 l (PC220/220LC-8M0)
PC200, 200LC, 220, 220LC-8M0
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