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AC 12G Crawler

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Redd00n View Drop Down
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Joined: 30 Mar 2020
Location: Australia
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Redd00n Quote  Post ReplyReply Direct Link To This Post Topic: AC 12G Crawler
    Posted: 31 Mar 2020 at 5:10am
Hi,
,
I am currently having issues with a AC 12G (I think) dozer. S/N 12 G-394. Machine starts and runs, all hydraulic functions work (blade and ripper) yet has issues driving. Machine hardly moves when in gear and any load put on by the blade or slight incline the machine will stop moving. Drive shaft from rear of engine to transmission turns in neutral and then stops when machine stops. Transmission oil is full.s Machine has a power shift transmission with 2 foot brakes and one pedal on the right with a “M” on it. Any thoughts on what the issue could be?
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CAL(KS) View Drop Down
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Joined: 18 Sep 2009
Location: Chapman, KS
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CAL(KS) Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2020 at 7:06am
check suction screens and verify pump pressure.   screens likely plugged and or pump shot or sucking air.

Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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DMiller View Drop Down
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Joined: 14 Sep 2009
Location: Hermann, Mo
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2020 at 7:23am
Also check your brake adjustments and linkage, brakes applied will divert oil to the steering clutches, does that driveshaft turn when brakes released and try to move?   Bucket Function and trans are two separate systems.
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Redd00n View Drop Down
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Joined: 30 Mar 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Redd00n Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2020 at 2:44pm
Yes, drive shaft turns when brakes released. Could you please tell me the location of the pump? Also what is the function of the pedal with “M” on it. Thank you.
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2020 at 5:03pm
M pedal is Main, or the Single ALL brake control. It is how you stop the machine instead of trying to turn with pedal steer. It Must return to full up or will have brakes applied, should also be a parking lock on it.
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Lazyts View Drop Down
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Joined: 05 Feb 2012
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lazyts Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2020 at 6:31pm
M is for Modulated clutch
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