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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Mechanical Troubleshooting
Brand: Caterpillar - Model: EP18KT
Number of messages: 2

START MESSAGE:
RoojamP
helsmlgo, Netherlands
Hello, I'm working on a Cat EP18K.
sn: 25111
Year of construction: 1999
The code 35 comes most, 33 occasionally.

Sometimes I get code 35 immediately if I turn the ignition on, sometimes I get it after a couple of times lifting. With a little luck I can lift a few times. Before the code is displayed, you can hear the pump running irregularly. The ampheres will be short up.
TVH has tested the board and has it approved.
(The gold plated print in the  middle)
I've replaced the IGBT of the liftcontrol and the matching current sensor.

The machine has the same codes as at the beginning.
Does anybody know what the cause of the problem may be?

Mesuring IGBT:
E (lifting) 0,26 Volt
With code I get:
0,83 Volt
0,5 Volt and 0,51 Volt
Strange noise from pump motor and high Amphéres.

At 0,4 Volt no code and upon 0,42 Volt I get a code.

Measuring at the G of the IGBT:
-12 Volt
-9 Volt with powersteering
+9 Volt at fully lifting
+12 or +13 Volt with failure code

-------------------------
PM paulmajoor@home.nl

Modified 7 Aug 2011 07:19 AM
by poster.
Reply  Report this message
REPLIES: Sort replies by
RoojamP
helsmlgo, Netherlands
Anyone?

Posted 11 Aug 2011 02:47 AM Reply  Report this message

Nichiyu

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