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  #1   IP: 78.145.197.16
Old 04-01-2017, 08:40 PM
mattey mattey is offline
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Default Yanmar b25v slew issues

Evening all and happy new year

My friends yanmar b25v 2005 model has a problem with the slew . It creeps a
Little when you try to slew but has no power at all . But also you can push the machine round by hand even with no one in the cab . Anyone have any ideas ?

Matt
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  #2   IP: 151.226.76.193
Old 04-01-2017, 08:47 PM
digger man digger man is offline
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Default Re: Yanmar b25v slew issues

Sounds like slew motor gearbox issues. Can you hear the slew motor hydraulics turning?
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  #3   IP: 81.178.208.22
Old 04-01-2017, 08:48 PM
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mogman mogman is offline
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Default Re: Yanmar b25v slew issues

sounds like the slew pinion has sheared or a gear let go in the slew gear box
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  #4   IP: 78.145.197.16
Old 04-01-2017, 09:19 PM
mattey mattey is offline
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Default Re: Yanmar b25v slew issues

Can hear something going on. What the sequence to go in for a look ? Anyone got any manuals to follow ?
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Old 04-01-2017, 09:31 PM
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cps140 cps140 is offline
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Default Re: Yanmar b25v slew issues

Sounds like the shaft between the motor and the reduction box !

Pull the box out and have a look if it turns when activated!
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  #6   IP: 89.143.15.150
Old 06-01-2017, 07:35 AM
traktorist traktorist is offline
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Default Re: Yanmar b25v slew issues

if you can turn around by hand you have problem with shaft on motor (if i remember corect slew motor has integrated brake...) (something is broken ) remove motor and you will se where is problem...
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Old 01-06-2017, 09:58 PM
Tinnerstoy Tinnerstoy is offline
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Default Re: Yanmar b25v slew issues

Did you ever find the cause of the slew problem ??
I've same issues on slew on an older 1.5t.
Stripped motor and box, looked OK.Pressures and counterbalance brake v/v good.
Bit of play in the geroler between the star and the rollers only thing I could find??.
Operates as it's told but weak to push/ spread sideways. Assume it's just worn, oil bypassing on the internals??
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