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  1. #1
    New Member
    Join Date
    Dec 2008
    Posts
    3
    Location
    Lakeland, Fl.
    Tractor
    ford 4000 1962

    Default B5 Excavator

    Hello to all, I hope you folks can help, My son has a Yanmar B5 excavator and the swing is weak,was wondering if anyone has one and what direction I need to go, I did a google search with little or no info, thanks, Dw

  2. #2
    Bronze Member ritchieb's Avatar
    Join Date
    Mar 2007
    Posts
    60
    Location
    near Parkersburg, WV
    Tractor
    Yanmar 1610D

    Default Re: B5 Excavator

    Several hours? Original owner? Abused or heavy usage over it's life? Check and clean the swing races (inner and outer) check, clean, and lubricate the swing bearings and pinion shaft. I have logged many hours on these small minimal tail swing/ zero tail swing excavators and they usually end up with a lot of wear and dirt in those areas. We have on occasion used them actually submerged in water and mud over the swing races and bearings. We had 1/2 inch soft laid winch cable wrapped around the races also. So check and re-check and clean. If no luck you may be in for new races, bearings, and pinion.
    Tell me I hear, Show me I see, Involve me I learn

  3. #3
    New Member
    Join Date
    Dec 2008
    Posts
    3
    Location
    Lakeland, Fl.
    Tractor
    ford 4000 1962

    Default Re: B5 Excavator

    Thanks for the help I will look at the races though it swings fine on level ground but on side ground trying to swing uphill it's weak, i talked to a dealer today and he said I should have 2744 psi to the motor and I have only 1500, so I'm thinking maybe the pump is getting weak. Dw

  4. #4
    Platinum Member
    Join Date
    Mar 2002
    Posts
    505
    Location
    Tennessee

    Default Re: B5 Excavator

    Do you know the brand of the hyd pump on the unit?

  5. #5
    New Member
    Join Date
    Dec 2008
    Posts
    3
    Location
    Lakeland, Fl.
    Tractor
    ford 4000 1962

    Default Re: B5 Excavator

    The name I'll have to write it down and type it in tomorrow, actually it has two pumps on it a lare one in front of a smaller one, the large one appears to be a piston type while the other is a gear type, I got the gear type pulled today which I've found out is the swing pump. DW

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