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  1. Southbus

    Champion 720 accumulator's pressure switch and bleeding.

    Hello friends, I need to get the pressure switch that is installed under the accumulators, while I get them I'll put some npt plugs, is there a way to bleed that end of the hydraulic circuit? The part number of switchs is: 44433 Thank you!!! Cesar
    • Southbus
    • Thread
    • accumulator bleeding champion 720 pressure switch
    • Replies: 4
    • Forum: Motor Graders
  2. Southbus

    Wanted Champion 720VHP Grader for sale!

    Hi, I have a Champion 720 from 1988 and I am thinking of renovating it. I would like a 720A series III or 720A VHP, ideally with few or average hours, well maintained and original. I appreciate any information or advice.
  3. Southbus

    Steering wheel and clutch pedal not working in the first engine start of the day.

    Hello everyone, here I am again looking for help to solve a problem with my Champion 720R year 1988, serial number 720-187-134-19089-88. On some occasions, to turn on the machine I cannot move the steering wheel or press the clutch, both are very hard and I think they have no hydraulic...
  4. Southbus

    Clutch failing on Champion 720, HELP!

    Dear friends, I have a 1988 Champion 720, it has an 8400 transmission. The clutch is starting to fail :(. Sometimes I press the clutch pedal, it feels soft, I move the selector lever forward or backward and the machine jerks as if I had not pressed the pedal, this happens sometimes and in some...
  5. Southbus

    Cummins 6ct 8.3 Cleaning oil circuit

    Hi Folks I am trying to clean the lubrication circuit of an engine, now it is without the cylinder head, without the pistons and without the liners, I have cleaned the entire area and several solids fell on the crankshaft. Taking advantage of the fact that I have also removed the oil cooler, I...
    • Southbus
    • Thread
    • champion 720 cleaning oil system cummins 6ct flow diagram lubricating system
    • Replies: 2
    • Forum: Motor Graders
  6. Southbus

    Champion 720 hydraulic acumulators bleeding

    Hello Friend how are you? me in my career to eliminate oil leaks in my Champion 720 year 1988. On this occasion, change the hoses (indicated in red in the attached illustration) that go from the master cylinders or brake valves to the hydraulic accumulators. One of the hoses was leaking oil...
  7. Southbus

    Champion 720 transmission seals replacement

    Moderators: please change current title by "Champion 720 transmission seals replacement" Thanks Continuing with my process of eliminating leaks on my 1988 Champion 720 motor grader ... I need to know the equivalences or measurements of the seals of the input shaft and the output shaft of the...
  8. Southbus

    Cummins 6ct 8.3, how to replacement crank front seal

    This is the engine of my Champion 720 Motor Grader year 1988. It has been losing oil for a while from this seal and before proceeding to change it I have some doubts. How difficult is it to remove the harmonic damper? Will I need a special tool? Is it necessary to remove the gear cover to...
  9. Southbus

    Champion 720 water and steam in the cylinder head breather, Help!!!

    Friends, I recently did an engine tune-up by replacing trucks, metals and rings on this engine. Cummins 6ct 8.3 After about 40 hours, the engine began to consume excess coolant, more than 2 gallons per day. Today I noticed that there is a lot of vapor and coolant droplets coming out of the...
  10. Southbus

    JD 310D inverter oil change

    Hi Folks Today I tried to change the oil in the backhoe inverter, remove the cap and about 4 liters were drained and according to the manual the capacity is 7 liters, so I tried to put 7 liters thinking that it was missing but it was filled before putting the 7 liters And then when starting the...
  11. Southbus

    Champion 720 tips for transmission oil change

    I intend to change the Transmission oil of my 1988 Champion 720 Motor Grader, transmission model is 8400. Despite not presenting any noticeable problems, I want to change the oil as the previous owner sometimes filled with ISO 68 hydraulic oil instead of Dexron II as indicated in the manual...
    • Southbus
    • Thread
    • 8400 atf 220 dexron ii transmission oil change
    • Replies: 8
    • Forum: Motor Graders
  12. Southbus

    Champion 720R, black smoke when accelerating suddenly

    Cummins 6ct 8.3 12 valve , 173hp The Story of this old Six cee tee This engine ran erratically, cylinder 6 was dead and always smoked heavily when accelerating. Observations: When disassembling, note that the liners had cavitation problems, especially that of cylinder 6. Work I put new...
  13. Southbus

    Champion 720 '88 liners and crankshaft

    Hi Folks, I am starting to build a cummins 6ct engine and I have some major doubts. It is my first engine tuning and so I want the opinion of people with experience. Firstly: The shirts have two grooves, in which one should I put the adjustment o ring? Should I put in addition some seal or...
  14. Southbus

    Champion 720 cylinder dead

    I think you have already seen that I am putting some time and effort into this old school grader but that it has been giving me the resources to survive these difficult times. I repair it myself because in these places the mechanics are very expensive and there are very few good and reliable...
    • Southbus
    • Thread
    • champion 720 cummins 6ct dead cylinder rust liner
    • Replies: 12
    • Forum: Motor Graders
  15. Southbus

    Champion 720 '88 Controller display back light

    Dear friends, I have difficulties to see which gear is selected in the controller of my motor grader, according to the electrical plan there is a display back light, but I do not dare to open the controller to check if there is a light bulb that works. Then I would like to know if it is possible...
  16. Southbus

    Champion 720R ´88 series III, What oils do I need?

    I have bought an old motor grader but with a very good pedigree, it is a Champion 720R from 1988 and I want to start by replacing the already worn oils. The manual recommends me: Transmission System: Dexron II Hydraulic system: SAE10W or Iso grade 32 or Dexron II Final drive: 80W90 Tandems...
    • Southbus
    • Thread
    • 720 champion dexron ii iso68 oil types sae 10w
    • Replies: 11
    • Forum: Motor Graders
  17. Southbus

    Deere 310D Hydraulic oil filter change.

    HZello everybody, I have a 1991 John Deere 310D backhoe and every time I have changed the oil filter it gets soaked falling on me while I unscrew it and try to put the new one in. I appreciate some advice to make this change without spilling a lot of oil, maybe you have to put the machine in a...
  18. Southbus

    Deere 310D Hydraulic oil filter change.

    Hi everybody, I need to change the hydraulic oil filter without spilling it and getting bathed in oil. Is there any way to do it? What is the procedure on a 1991 John Deere 310D backhoe? Regards Cesar
  19. Southbus

    JD 310E Cylinder head bolt torque

    Hi everybody! I hope everyone stays safe with their families. I am repairing a 2000 John Deere 310 E Backhoe. I need to know the cylinder head bolt tightening order and the torque to apply. Regards from Chile, South America. Cesar
  20. Southbus

    John Deere 310G MFWD ever active

    Hi my friends, Again I turn to this prestigious forum for the following problem: This JD is a 2006 310G, after a heavy day of work using the MFWD to climb very steep slopes and with load, the gearbox began to lose oil from the dipstick and the double traction has not been able to disconnect...
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