Komatsu Galeo PC800-8, Shop Manual

Page: 438 / 1117

8
PC800, 850-8
SEN00914-02 30 Testing and adjusting
Preparation work for
troubleshooting electrical
system
a
When troubleshooting an electric circuit related
to the machine monitor, engine controller, or
pump controller, expose the related connectors
according to the following procedure.
1. Machine monitor
1) Remove cover (1).
a
The cover is secured with 2 clips at the
top and bottom. Those clips can be re-
moved by pulling them up.
a
If a sunlight sensor for the air conditioner
is installed, disconnect connector
P31
on the backside of the cover.
2) Remove the 3 mounting screws and discon-
nect machine monitor (2) from the mount.
a
Take care not to drop the mounting
screws in the console.
3) Insert or connect T-adapters for trouble-
shooting to connectors CM01 , CM02 , and
CM03 of the machine monitor.
2. Engine controller
1) Remove controller cover (1).
2) Insert or connect T-adapters for trouble-
shooting to connectors ENG , CE02 , and
CE03 of the engine controller (2).
a
Since the connectors are secured with
screws, loosen those screws before dis-
connecting them.
a
After returning the connectors, tighten
the screws to the specified torque.
3
Screw: 2.82 Nm {0.288 kgm}