I have a 6 month old forlift that gets used roughly 10 hours per week. I have been having an issue with it jerking forward when the forks are roughly 12-15 feet in the air. As I boom the carrage out the forklift all off a sudden jerks forward causing me to pull the joystick backward to counter the movement. This action does not happen everytime but it has hapened probably a dozen times since we got it. I have come close to losing a couple of loads and taking out racking because of this issue. It is a huge safety concern as the forklift is jolting forward on its own!
Has anyone experienced this before or know why it might be happening?
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edward, i'm going with the 'pivot' because as most of us tech's know... WE are all familiar with the term being that we wind up being the pivotman between the customer and the lift.
just a little off topic humor there... heheh ;o)
depending on the software version in the truck you may not be able to use any functions with the deadman pedal up. There was a change this yr by ANSI. As this is an intermittent problem you should try running the test I believe AO5 for the control handle to see if the travel pot is changing while you are reaching and lifting you may be inadvertantly moving the handle forward while lifting and reaching
maybe "pivot" would have been a better word than "turn"?
edward_t - The brand of reach truck isn't sold in the US & I've yet to see a European spec reach truck with a control handle you can actually turn.
US reach trucks are a lot different in design & operation to what us European's & the rest of the world see as a proper reach forklift truck ( apart from the god awful Linde X range with it's pantograph reach system )
Thanks for all the responses. He ran a couple of tests and said nothing was found, exactly what I thought would happen. I'll have to keep my eye on it and maybe once someone comes for my scheduled maintenance I will get them to check out what everyone recommends.
Thanks again
well forkingabout, what ever you do, don't tell -US- what type of truck and what the error that was cured was... or how it was cured...
lol
Can we -guess- it had to do with wires rubbing on the control handle when it was turned...
If you can, try & get a video of the truck playing up for the tech.
Some faults a tech really needs to see / experience it for themselves.
Myself & another tech I work with have discovered a fault on a certain reach truck family which can cause all sorts of odd electrical things to happen & not throw any error codes, it took us a few hours working together to pinpoint the cause but we found then cured the fault.
Yup, swoop, and the other thing is that you can't trust the truck to troubleshoot itself all the time. The analong tests, for instance, are just "sampling" of the needed resistances/voltages...nothing beats a good Fluke test! I've had reach trucks tilt and even honk the horn intermittently by themselves. No codes from the truck and analog tests looked good...until you hooked up a meter.
Low on oil eh?
Hehe...that's a first
I was thinking the flux capacitor may have a glitch ; o)
Just kidding of course...
I would pay attention to the control handle and it's circuits and outputs.
Was that tech that came out a raymond tech?
From the description and response you got it doesn't sound like it to me.
There are specific tests that can be run from the maintenance menu that will monitor voltage outputs and should reveal any abnormal signaling from the drive system or handle.
That's the problem with a lot of techs.... if the problem doesn't just jump right out there they don't want to spend the additional time to troubleshoot it.
Ughhhh....
For approx. 30 seconds after you step off the deadman pedal you should be able to continue to lift, lower, side shift, tilt and reach, just not travel. This time limit is reset if these controls are used before that 30 seconds. I believe there may be a setting for this in the configure menu. Travel should be the only procedure cut out by not stepping on the dead man. Have the tech visually inspect the short cable going to the control handle. The newer style handles have a seperate cable which can be changed out. Due to the bend in the cable where it connects to the handle it gets cracked and causes signal shorts.
It's not pulling the forklift forward, it is actually driving forward. I had a service tech come in and look at it last week and he couldn't find anything wrong with it. I'm suppose to inform him if it happens again...
is the mass of the load being extended so fast that when it suddenly stops the load pulls the forklift forward??
if so check relief pressure, and speed settings
machine is 6months old, call the dealership to fix it under warrenty
The commonality here is the control handle.. Have you run the tests on the handle? Is it properly learned?
Thtat the truck moves may also suggest that the brake is not holding properly
Yes and it's a jerking motion
Are you saying that when reaching forward the machine jumps forward from the drive motor pushing it?
If the deadman is not pushed down I lose all power to all controls. Maybe it is low on oil, I will have to get a service guy out here to check it out.
Thanks for the replys
? low on oil?
?forward tractor motion when reaching out?
sounds like a need to be able to let off the brake/operator presence pedal while operating the reach when looking upwards. The reach cylinders are double action cylinders, meaning they put exactly as much oil back into the tank as they use.
maybe I just don't understand the question/problem well enough.
sounds like your machine is low on oil
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