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Mechanical Troubleshooting

Brand: Allis Chalmers - Model: 500

Number of messages: 4

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rich_k
Ontario, Canada

Hey guys, I have this old AC that won't start. Turns over but very slow even while being boosted. Checked cap and rotor,wires,plugs all ok. checked propane system seems ok.. It seems no matter where you position the for/rev pedal there is no difference Need some ideas. Thanks Rich

Posted 21 Nov 2008 08:37 AM

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tom_v
United States

You say if turns over but very slow even while being boosted.
Have you checked out the starter???

Posted 21 Nov 2008 12:26 AM

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edward_t
North Carolina, United States

and the Ignition timing? and try a new battery, your old batery may be revesing polarity and still drawing down the boost, rather than the boost going to the starter...

Posted 21 Nov 2008 10:18 PM

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justinm
New York, United States

do a voltage drop test on the starter cable
hook up 1 lead of the meter to the B+ terminal of the battery
hook up the other to the large cable terminal on the starter (the threaded post with alligator clips, not the cable terminal ring)

if the cable is good the voltage while cranking will be around 0v
if the cable is bad it will read voltage (even just 1 or 2 volts is bad and would indicate resistance in the cable where there should be none)

repeat this test for the negative cable (B- and the engine block or the metal housing of the starter)

-------------------------
New York, New York its a heluva town ..you know that The Bronx is up ..and im Brooklyn down

Modified 22 Nov 2008 07:52 AM
by poster.

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