Sites: GlobalSpec.com | GlobalSpec Electronics | CR4 | Electronics360
Login | Register
The Engineer's Place for News and Discussion®

Previous in Forum: How Does a Zig-Zag Transformer Sense the Earth Fault?   Next in Forum: DC Motors and Speed Control
Close

Comments Format:






Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







10 comments
Anonymous Poster

Wiring Diagram for Hyster Electric Forklift

05/01/2008 8:36 PM

Wondering if anyone can give me a web address for a wiring diagram for a hyster electric forklift model : N30XMH

i have lost all hydraulics and there seems to be no power to any of the switches i assume i'm looking for a relay of some sort??

any help would be much appreciated

Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru

Join Date: Feb 2008
Location: Milky Way galaxy, Sol solar system, Earth (not Giaha), USA, WA, N.E.
Posts: 692
Good Answers: 13
#1

Re: Hyster Electric Forklift

05/01/2008 10:06 PM

www.hyster.com/

__________________
They that do not learn from history and apply those lessons to the present are bound to repeat its failures.
Reply
Guru
Hobbies - Fishing - Old Salt Hobbies - CNC - New Member United States - US - Statue of Liberty - New Member

Join Date: Mar 2007
Location: Rosedale, Maryland USA
Posts: 4407
Good Answers: 210
#2

Re: Wiring Diagram for Hyster Electric Forklift

05/03/2008 12:21 PM

Most electric lift trucks have whats called dead man switch on the seat. Check it have seen where the operator has stuff crowbar or chains behind seat and the worked their way under to obstruct the seat from going all the way down.

http://www.fsip.biz these people many have the info you desire.

__________________
Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Reply
Guru

Join Date: Mar 2008
Location: Atlanta, Georgia
Posts: 756
Good Answers: 12
#3

Re: Wiring Diagram for Hyster Electric Forklift

05/03/2008 4:30 PM

No insult intended cause this is very basic.

DC battery supplied circuits have an interesting habit of having terminal connections oxidize, especially battery terminals where you get a black oxide that insulates.

First thing I always do, be it a lift, car battery, etc., is check and make sure, not only that the battery is not dead, but you are actually sending power along the cable. This means checking for voltage on the cable lug, not just the battery terminal.

Crimp on lugs also are subjected to battery acid vapor creeping into the crimp so that to ensure power feed you also need to check the other end of the cable.

As I say, simple and no insult intended but these are common issues with battery supplies.

As another poster commented, the next step is the kill switch under the seat.

j.

Reply
Anonymous Poster
#4

Re: Wiring Diagram for Hyster Electric Forklift

05/16/2008 1:22 PM

elec forklifts have a shut off when the battery gets low check the batt voltage

Reply
Participant

Join Date: Jun 2009
Posts: 3
#5

Re: Wiring Diagram for Hyster Electric Forklift

06/15/2009 10:57 PM

The problem is probably a large power fuse or one of the many small control fuses in the electrical panel. Find the hydraulic contactor and manually push it in, make sure some one is by the battery plug to unplug the battery if the hydraulic motor continues to run. If motor doesn't run you have a large power fuse that needs to be replaced. If motor does run than the problem is in the hydraulic control circuit and is probably a small fuse or switch that is bad. If the problem is still there it could be many things including wiring , battery fault indicator , battery hydraulic cut-out control card , hydraulic control card , hydraulic motor , seized hydraulic pump , hydraulic snubber , and a few other things. I have a diagram for a Hyster N30R. It is similar but not exactly like the one you need.

Reply
Anonymous Poster
#6
In reply to #5

Re: Wiring Diagram for Hyster Electric Forklift

06/18/2009 1:48 PM

I am having a problem with my hyster E30AC the speed controler it only goes top speed I sure could use a section of your manuel if you could help me out. p11maddog@gmail.com,

Thanks Scott

Reply
Participant

Join Date: Jun 2009
Posts: 3
#7
In reply to #6

Re: Wiring Diagram for Hyster Electric Forklift

06/20/2009 2:21 AM

check battery voltage,check for welded contact tips [1-A, field weakening]. Also depress speed controller an listen for clicks from two switches. I don't have a repair manual for your forklift. I am telling you this from 38 years of forklift repair experience.

Reply
Anonymous Poster
#9
In reply to #7

Re: Wiring Diagram for Hyster Electric Forklift

02/21/2010 7:24 PM

I'm having a similar problem with my Ordermaster. It's a 1998 and in pristine condition. The battery was just sitting there for the past year-or-so. And the forklift just sold on Thursday. Today, I had to putt-putt it across my warehouse to get it to a charger. Charged it up, the battery light is up to 'green' (third LED from the right). But when I try to take the platform up, it shuts off (which I assume is the 'lift interrupt). The lights and fan work. The switches work for back/forward - but the hydraulics don't attempt to turn on.

So, what does the "welded contact tips" refer to? The Operator's Manual mentions the following. Unfortunately, I don't have the Service Manual.

"If the lift truck has been operated using a low battery or deenergized using the Emergency Stop Knob [which I had done both ... just tested out the ESK], inspect for welded contacts BEFORE connecting to a charged battery."

So what does the "welded contacts" refer to? Is it an easy fix for someone like me ("handy", but not necessarily "knowledgeable")?

<---Hoping to get this started up by tomorrow morning. :)

Reply
Anonymous Poster
#10
In reply to #9

Re: Wiring Diagram for Hyster Electric Forklift

02/22/2010 3:37 AM

THE WELDED POWER TIPS CAN BE FIXED BY PRYING THEM APART. LOW BATTERY VOLTAGE IS WHAT CAUSES THEM TO WELD TOEGETHER. MY SUGGESTION FOR YOU IS TO TEST AND SEE HOW MUCH VOLTAGE YOU HAVE IN THE BATTERY. IT SHOULD HAVE 2.25 VOLTS PER CELL FULLY CHARGED. DISCHARGED VOLTAGE IS 1.75 VOLTS PER CELL OR LESS. YOU CAN ALSO TEST BATTERY CHARGE BY USING A HYDROMETER. HYDROMETER READING FULLY CHARGED SHOULD BE 1280. DISCHARGED IT WILL BE 1150 OR LESS. THE HYDRAULIC LIFT INTERRUPT CIRCUIT IS PROBABLY THE PROBLEM. THE ONLY WAY TO FIX IS A FULLY CHARGED BATTERY. ALSO JUST BECAUSE THE CHARGER LIGHT IS GREEN DOESN'T ALWAYS MEAN THE BATTERY HAS A FULL AND COMPLETE CHARGE. SOMETIMES THE NEW DIGITAL CHARGERS GIVE A FALSE READING AND THE ONLY WAY TO KNOW FOR SURE IS TO TAKE VOLTAGE READINGS OR TEST WITH A HYDROMETER. AFTER A BATTERY SITS FOR A LONG TIME WITHOUT A CHARGE IT STARTS TO SULFATE.[ INSIDE THE CELL THE ACID LOOSES ITS CHARGE ABILITY.] BY CHARGING THE BATTERY SEVERAL TIMES IT SOMETIMES COMES BACK.TRY CHARGING THE BATTERY SEVERAL TIMES AND MEASURE VOLTAGE AND SEE IF IT IMPROVES.

Reply
Participant

Join Date: Jun 2009
Posts: 3
#8
In reply to #6

Re: Wiring Diagram for Hyster Electric Forklift

06/20/2009 3:10 AM

The hyster E30AC speed controller is a 10,000 ohm poteniometer.That is not where I would look for a problem though. Electric forklifts with solid state controls usually have only two problems with speed control. First is no motor torque and the second is full motor torque . Before you decide that the culprit is the speed controller; I would do the following checks : open control panel and check for stuck contact tip on the forward , reverse , and 1-A contactor . Also check for stuck contact tips on the Field weakening if forklift is so equiped . Low battery voltage is what causes the tips to stick . [You could have a battery problem , not a forklift problem ] . If battery voltage is ok , and contacts aren't stuck ; listen to the speed controller as you depress it . You should hear a click of a switch as soon as you start to press down ; and you will hear another click just before it hits bottom . If that is not the problem than it is a major problem . You will need a trouble shooting guide . Call your local Hyster dealer and ask the service manager for a copy of a trouble shooting guide . Most service managers are nice enough to fax or copy one for you.

Reply
Reply to Forum Thread 10 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

Anonymous Poster (4); Jack Jersawitz (1); old timer 696 (3); ozzb (1); Shadetree (1)

Previous in Forum: How Does a Zig-Zag Transformer Sense the Earth Fault?   Next in Forum: DC Motors and Speed Control
You might be interested in: Forklift Repair and Maintenance Services, Wiring Ducts, Fiber Optic Wiring Accessories