• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Search results

  1. S

    JLG 450A Basket Controls Stopped working

    Ground Controls work find, but Basket Controls dont work at all. it seemed to be erratic 2 or three times, when using a function in the basked.... like having to let off foot pedal, then repress it and try the function again. Next day when I got on it, no Basket Controls at all would work...
  2. S

    JLG 450A out of level and wont move

    I have about 2006 model 450A I have used it for years on inclines I drove it up on an incline recently and used it several days, traveling back and forth The incline is much much less than other inclines ive been on in the past Yesterday i got in the basket to travel it a bit and the out of...
  3. S

    Bobcat 442 swing brake problem

    Newbie Bobcat user I have a 442, serisl #522311491. In top of the left joystick, there is a button that has something to do with swing brake I pressed that button few days ago. Ever since, after I release the joystick to stop swinging (slewing??), it stops HARD. Stops way too hard - im sure...
  4. S

    Bobcat 442 aux hyd wiring

    I have a 2004 bobcat 442. Someone cut out a lot of wiring insteard of replacing circuit board. Shop tells me that computer is dead Everything works except the auxillary hydraulics. If I can figure how to wire them back up, would I still have to replace the computer before they would work? Any...
  5. S

    JLG 450A Basket swivel problem

    I have a 2002 model jlg450a duetz diesel 4x2. About 30 hours ago, the basket swivel to right and left, started 'drifting' if on hillside. You could hit the bam bam switch and get it back in position, but would slowly drift again. When level there seemed to be almost no problem. More recently...
  6. S

    Snorkel atb50 governor and fuel issues

    I have an atb50 snorkel, about a 2000 year model. Sn is Ju00192. It is dual fuel, but I’ve only used gas, not propane. It has quite suddenly stopped running after 5 to 30 seconds of running. It seems to be fuel related as I can pour a big if gas in top of carb and crank it, whereupon I can...
  7. S

    Need Bobcat 442 lip seal

    Part number 5904658721 It’s a seal for the slew highest motor in bobcat 442 442 excavator Terex uses same part number but call it groove ring in 2 or 3 of their excavators (tc 75). Bobcat dealership says going take at least month for them to get it I have found it on internet at aga-parts and...
  8. S

    Bibcat 430 excavator turret isdues

    Ive purchased a 2005 bobcat 430. My first experience with bobcat. When rotating the cab, there is lot of vibration and almost a grinding noise coming from the vicinity of the turret. I've not had a chance to start looking yet. Anyone have tips as what it might be or how to start looking into it...
  9. S

    Weak final drive on cat 311B excavator

    I've owned it for 5 yrs, 2000 hrs. When I bought it, one final drive hydraulic motor was weak. It's still weak. However, very surprising is that I cannot tell that it is one bit worse now than when I bought it. The machine has 9500 hours on it. I would have thought that if internals of drive...
  10. S

    Jlg 450a dies when switched to basket contols

    Cranks and runs fine at ground controls, but switch appears dead when turned to basket. Any ideas appreciated, but wont help to send me working diagram. I cant read them. If I could figure out how to lift the basket control pa el top,I could look to see if emergency cutoff switch has loose...
  11. S

    JLG450a - Need a Diesel Motor

    Today, I blew the deutz Diesel motor on my 2000 year model, jlg450A boom lift. I would like to know how to find a matching new or rebuilt motor. My serial number is 0300048777. I don't know where/how to find exactly which model engine it has. All I know is that it is a 4 cylinder, air cooled...
  12. S

    JLG 450A hydraulic leak

    I gave just today purchased jlg 450a lift. It has a bad hydraulic leak when trying to activate the lower boom cylinders. I cannot see the source of leak, but it seems to be coming from the area of lower end of bottom boom. The lower two cylinders do not work....probably because all the fluid...
  13. S

    Dump truck.jumping out of hi gear

    95 Topkick with 5 spd transmission. When I let off gas, transmission appears to be lurching back and forth. Tecently, it has started jumping out of high gear - sometimes as soon as put it in gear. I know some of the brass scychonizers have disintegrate as I have had to dig them out of the pto...
  14. S

    How to quickly blow the new seals in track tensioner cat 311b

    OK...so recently I bragged a little about how quickly I was able to get the 2nd of 2 cat 311b track adjusters out, replace the seals and re-install it. Well this past Saturday, I got humbled. I told a big brute of man who works for me sometimes to go tighten the tracks up good and tight. He...
  15. S

    cat 311b bottom carrier rollers dimensions

    I need to know the diameter (new) of the part of rollers where rails engage the roller. Mine seem to be fine and the pins/bushings don't appear to be worn badly. However I am seeing some significant signs of metal to metal where sides of rails are eating into bottom side of rock guard at the...
  16. S

    Replacing Front Idler, Cat 311B

    I have a front idler with busted bearing. I'm told I have to replace the entire idler. Be that as it may, I've reached an impass. I got the track off and idler off. Not a problem. Then I unbolted the spring and it's housing from the yoke that straddles the idler. Next I drove the roll pins...
  17. S

    Simple way to remove Track Tensioner Cat 311B

    First things first. Thanks to everyone who gave me tips and pointers on how to do this. Thanks especially to Nige for the schematic. That helped tremendously when replacing the seals as mine were so shot I count not tell which seal went first, etc. I've removed, rebuilt and replaced both...
  18. S

    service manual shop manual for cat 311b

    I need shop manual for cat 311b. Thanks Stacy Whetzell
  19. S

    cat 311b track tensioner

    I have a track tensioner leaking bad on cat 311b ex. I'm a newbie to excavator and have not crawled under it yet to check it out much. Does an excavator have the big coil spring like a dozer has, through which the tensioner passes? If anyone could share a schematic of track tensioner for...
  20. S

    John deere 450 oil pressure problem

    Original jd 450. Engine runs good, good power. Has about 50 psi oil pressure per the guage at full throttle when cold. About 30 to 35 when cold at idle. When hot oil pressure is about 30 psi at full throttle, but falls to near zero at idle. Any ideas appreciated Stacy
Top