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Freakshow 
Bronze Level
Joined: 18 Oct 2016
Location: Wa state
Points: 4
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 Topic: 918 Allis backhoe
Posted: 18 Oct 2016 at 10:58pm |
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Working on a 918 allis backhoe. The hydro stat and power steering have been going out intermittently. It has gotten worse over time. Found that all the levers work and are moving the valve block for the hydrostat. I have also found that the supply pressure builds pressure for a few seconds which allows it to move and steer. Soon drops and will not move or steer. Is there a pressure relief that I can check? Is there any possibility of a hydraulic schematic out there?
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Coke-in-MN
Orange Level Access
Joined: 12 Sep 2009
Location: Afton MN
Points: 41352
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Posted: 19 Oct 2016 at 4:54pm |
sounds like time to find the manuals for it to get full info on the machine . Or can talk to shop at Herc-U-Lift in Mpls MN - they sold and serviced the machines .
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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Freakshow
Bronze Level
Joined: 18 Oct 2016
Location: Wa state
Points: 4
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Posted: 19 Oct 2016 at 10:05pm |
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Any ideas where I can find a service manual for one?
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Dgrader
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Joined: 17 Jan 2015
Location: Newton,IL
Points: 1037
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Posted: 20 Oct 2016 at 5:19am |
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Try minn par. They should have one. Or e-bay.
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Ya cain't fix stupid.
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Eric B
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Joined: 09 Feb 2012
Location: British Columbi
Points: 900
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Posted: 20 Oct 2016 at 3:44pm |
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Sounds a bit like oil supply may be seriously restricted...like a plugged screen??
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7269
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Posted: 20 Oct 2016 at 9:55pm |
 Eric B wrote:
Sounds a bit like oil supply may be seriously restricted...like a plugged screen?? |
I agree.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Freakshow
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Joined: 18 Oct 2016
Location: Wa state
Points: 4
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Posted: 01 Nov 2016 at 12:12pm |
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I have pulled the screen. A few pieces of plastic and brass. Nothing too alarming or plugged up. Also only got 2 gallons out of sump. I am assuming I'm checking levels at the wrong spot being there is still some on stick in front of seat after draining all fluids. Anyone may be able to help guide me in the right direction?
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Eric B
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Joined: 09 Feb 2012
Location: British Columbi
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Posted: 01 Nov 2016 at 12:59pm |
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Being that experience and help isn't very plentiful for the 918 I suggest you buy a service manual for it, some are available on ebay, it may solve some mysteries for you. My understanding is that the 918 is built on a 180 farm tractor with a number of modifications. You may get some help on tractor info from the A-C 180 but for instance the transmission and fwd reverse is modified to suit being a backhoe. There has been the odd post on here about this re the 918 so yes some people that brush with this forum would have some answers for you...but where are they when you need'em??
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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