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Mechanical Troubleshooting

Brand: Caterpillar - Model: EP16KT

Number of messages: 8

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manuel_m
Sevilla, Spain

Hi

I have problem with an EP16KT electronic forklift,It is working fine but sometimes the fault code number 51 appears on the screen and the forklift get stop, after that I have to start the system again (turn off and turn on the key). What could be the problem ?.

Thanks

Posted 29 Sep 2005 07:33 PM

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HansvM
Flevoland, Netherlands

dear all,

just been set up as forum user.
Here my point of view on this subject.
Like Etharp stated, is could be related to the accelerator itself. Would like to add some to this. This (Janpanese manufactured) accelerator was introduced in 1996 and proven to be a very reliable component. What has been seen in the field is that a pin in the 4-pin connector of the main harness connection to this accelerator could be pushed back in the connector. Mechanics tend to pull the wire to disconnect this accelerator when removing the floorplate since this is a very tight fit connectorand resulting in intermitting contact. During operating the truck it could generate the code 51. Truck stops, recycle the key-switch and drive off again.

Secondly, the yellow multi pin connector in the main truck logic card (located on top of the control panel in the counterweight) is often pulled out by depressing the mini lock pin and pulling the wires! Also a reason for a pin being pulled out of the connector making intermitting contact.

Hope this helps.
Regards, Hans.

-------------------------
Hans Flevoland, the Netherlands

Posted 28 Sep 2006 08:23 PM

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daniel_g
Flevoland, Netherlands

Also overlooked here is to use self diagnostics to determine that the ON/OFF switch is activated before the display starts to indicate the 0-15 position steps.

As Hans says the accelerator pot is very reliable and in our expierience error code 51 can be solved by simply rotating the pot on the adjustment slots.

Posted 29 Sep 2006 08:18 PM

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maluccio_g
France, France

Yes Daniel, Error 51 is not correct offset accelerator.
In my forklift park (2 EP16K and 2 EP20K) two time i have this error.
One time i have remplaced this part , one time i have adjusting offset.
Check the offset before the remplacement accelerator.

Posted 2 Oct 2007 02:36 AM

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RayTech
Ontario, Canada

This code is common. What gets me is the pot (same one in a toyota car) has a switch and pot. 2 wires for "on" switch are supposed to be 3 ohms new..but often the best you get is 20 ohms. When code appears, the resistance of the "on" swith is 75 or more ohms. Also, the wiper resistance does not sweep smoothly when bad...it jumps with the fluke meter needle. Some switches are bad right off the bat! Using 100 psi to blow the machine does not help them. Plugs are a problem too...female pins spead their legs...and that could be trouble...;)

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Posted 12 Aug 2008 10:44 AM

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Davie
Ontario, Canada

Accel fault struggled at customer once and found wire at plug in Logic board it was the wire from the accel pedal I forget what colour it was bur=t if you wiggled it it would cause the code 51. I just bent the pin in the logic board a bit to make a tighter fit...I hope it helps... Still check to accel pot first and the wiring.

Posted 5 Dec 2008 11:15 AM

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