JLG 600sj boom lift repair

[@Nudnik1]

JLG has free service online books. Scanners cost only $500 . User mechanic friendly. Excellent machines. guys.Keep up the good work .

[@lumberjackdreamer6267]

I like the maintenance record labels. Great idea. I’m gonna use that method too. Thanks.

[@Nudnik1]

that was from united rentals. Fuel filters and grease motor oil and filters turntable grease, planetary hub oil and dry lube boom telescope slide areas. Not much else to do. Keep an eye on hoses wires in cable tray on side if boom. Also check tension on cables inside boom grease pulleys in there. JLG ,Genie both good made in USA .. Good luck

[@lumberjackdreamer6267]

@@Nudnik1 I just ordered a label maker. I’m gonna print labels to record maintenance. That’s smarter than a sharpie or a notebook.

[@NickRemetan-rn7ft]

Hi, great video. I have a question, I just got a jlg 1250 and it only drives one way.When i try to go the other way only one wheel drives the other ones are locked. Do you have an idea what it can cause it

[@Nudnik1]

Check pressure to release spring brakes in each locked wheels . You can manually release hub brakes by reversing tabs on planetary hubs two small bolts and flip tab so button pushes in release brakes freewheel Machine will roll so block them. Pressure to drive motor releases spring applied brake discs in each hub May not be getting pressure. .

[@NickRemetan-rn7ft]

@Nudnik1 So can it be the one of the valves that is defective for not sending the pressure to the wheels

[@TerryJackson-u4x]

At 3:45 you said one of the foods were bad. What problem did that correct? I have a 600AJ that won’t idle up or operate with the pedal and suspect one of the diodes.

[@Nudnik1]

On back by pump where hinge to swing motor out wires were broke . Get a JLG scanner about $750 Check double micro switches One open one closed in foot pedal and Joystick wires in upper for loose connection etc . When foot pedal pressed green light on upper console should come on . Also small green LED on Computer in lower by key switch flash trouble code in Morse code. Google JLG service free service download manuals free

[@TerryJackson-u4x]

@@Nudnik1 I’m looking into getting one, found a used one for $250.00 I was wondering what problem the diodes corrected.

[@Nudnik1]

@@TerryJackson-u4x dirty diodes did not feed a circuit .5 years ago I can't remember.

[@TerryJackson-u4x]

@@Nudnik1 I understand that. Thanks for the reply and the info about the manual’s online. I’ve downloaded one and trying to troubleshoot now. Thanks again!

[@Nudnik1]

Tilt sensor on base of upper frame has three adjustment screws to level. On main base plate of frame.

[@jesuslua5070]

I have one that turn on but won’t move I will check for that

[@dagger3dagger901]

Jlg 600 engine trouble code 437 would you have a root cause for fault code

[@Nudnik1]

What engine Deutz? JLG has free service and parts troubleshoot guides online.

[@theraifs8120]

I just bought a 2005 JLG 450Aj boom lift it won't start sounds like flooded but not sure any idea my friend

[@Nudnik1]

That may have a gasGM 4cylinder efi motor . Check for good spark at plug and power to spark module and for fuel pressure . I had one not start it was ignition module . These are more reliable than old Ford Power junk. See if it starts on starting fluid if so Electric fuel pump issues. You should here electric fuel pump running next to plastic fuel tank it's silver inline pump 60psi .

[@bradwhalen2000]

This question is not exactly related to you video, but I'm STRUGGLING to find the tilt sensor on my JLG 600AJ. Any idea where it is located? I have searched the machine and the internet for HOURS! Any help would be greatly appreciated. Thank you

[@Nudnik1]

On flat base plate of upper frame under near hydraulic s usually. Has three adjustment screws to level calibrate. Service books on JLG online for free.

[@bradwhalen2000]

@@Nudnik1 thank you.

[@Nudnik1]

@@bradwhalen2000 also machine reads out trouble codes by blinking led in control box. A Morse type code.

[@bradwhalen2000]

@@Nudnik1 yes, the only code it is reading is 3+3. I tried to find that on the Internet and all I could find was a generic “engine stress“ code 🤷🏼‍♂️

[@Nudnik1]

@@bradwhalen2000 what is it doing Which engine also? Check plug pins on upper control box and look for broken wires in the long harness going down boom to lower box. Older machine s wires break in harness where it turns bends pinches etc

[@tianpurba1904]

everything works fine, except the wheels won't run. what's the problem brother. 800 aj

[@Nudnik1]

Brakes locked on boom switch may be bad or disconnected.

[@aguspurwanto9868]

Hallo sir.. i am trouble boomlift.. can you help me??

[@Nudnik1]

What is issue?

[@dhag1745]

Thanks for the video Golem1! Subscribed!! Had a question regarding a 2007 JLG600a CAT engine Sn 0300113571 I just got it and I'm having an issue with engine malfunction light flashing three times on platform. It doesn't seem to affect any of the operation but don't want to risk damage. Also, I did just order the analyzer should be in soon. Additional question what type of coolant should I use?

[@Nudnik1]

The led in lower box flashes a morse code as a trouble code number. Which symbol is it ? I use good quality antifreeze and distilled water only. Code reader does nor read CAT (perkins ) motor. Check the crank sensor on rear bell housing for metal chips on magnet cause of mine going haywire. Shalom

[@dhag1745]

@@Nudnik1 thanks for the reply! It's the engine symbol on the platform display(bottom middle symbol). The engine runs smoothly it doesn't have the issues that yours did with throttling but should the engine rev up when you are using functions? Like when you increase the function speed at the platform and then use a function should it rev up a little? Mine just stays at an even speed without revving.

[@Nudnik1]

@@dhag1745 Engine symbol means are "low oil pressure, Overheating set that lamp typically. Check connection s on sending units for engine oil pressure and temperature for broken wires or corrosion etc. All JLG manuals online for free. Me Grove ( JLG ) was a inventor of early farm equipment and hydraulic mobile cranes in Pennsylvania. Good luck

[@carlosdeluna7724]

Hello, Mine says power module failure-personality range error

[@Nudnik1]

May need new ecu

[@saabaniroger7617]

Good video, please can anyone help, model 600AJ can not start from the basket and 3/3 error code pup up

[@Nudnik1]

Pin out all wires from upper through harness to lower control junction. Use a test light put small amp load on each wire. Disconnected from Upper and lower boxes.

[@brishekhsinghania8029]

It's very useful Plz make a video about jLG hydraulic system

[@Nudnik1]

Study load sensing variable displacement hydraulic pump circut. Then study Square wave control (Electronics). JLG gas free info online. Good luck . You Sikh in Punjab?

[@Nudnik1]

Combination square wave electric emf control to actuate control spools on hydraulic valve body to vary speed of each function. Variable displacement pressure compensated pump on these. Look up Rexroth pump on you tube . Good luck

[@technology_pro]

Nice work fixing things nobody else can figure out....Respect! Fk JLG for throwing proprietary shyt they know will break to make service money.. Typical

[@austinreeves5221]

buy a JLG scanner. auto tests all lines

[@austinreeves5221]

LOL nevermind

[@Nudnik1]

Yes i got one. But the it doesnt interface with Deutz or CAT engines. I have CAT ET which only does 75% . You have to pay dealer to scan repair newer equipment. They charged me $1000 just to come scan a newer CAT 308 excavator . No repair just scan. This is common now and should be illegal. Right to repair act .

[@technologymaster]

Well Done

[@Nudnik1]

Thanx.. Lucky sometimes also.

[@Nudnik1]

"Motorhead" my old channel check out.