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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
1992 743B cold starting PAIN
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<blockquote data-quote="Tazza" data-source="post: 7209" data-attributes="member: 82"><p>They are rated at about 475PSI new but i was told as low as 300 was about as low as it should be before starting is very hard and loss of power is an issue. One way to check for wear is to see how much blow-by you have. If there is a lot its probably a compression issue, if there isn't much its probably plugs or a relay.</p><p>After a re-build mine was just over the 400 PSI mark, it still starts pretty easy with a 10-20 second glow. It blows a bit of white smoke at start up though. I think the piston to head height isn't quite rite.</p><p>When its warm it runs well you said, no smoke? as it could be an injector issue if it blows excessive smoke.</p><p>From what i was told about starting fluid is the modern stuff has lubricants in it unlike the old stuff that would damage engines from lack of lubrication.</p><p>Its not a bad idea to check compression if you have the tools.</p><p>As for glow plugs, its rare for them to burn out but it does happen. I had a set that when you hook them up to a battery they would only glow at the base of the thread, they had burnt down to a point at the end. You need the plug to glow from the tip to the base or it simply will not do the job. Remove the plugs and use a test cable and a battery and see if they glow correctly (watch your fingers, they get hot FAST). If they glow correctly throw them back in, the new ones won't work any better.</p><p>Let us know how you go.</p></blockquote><p></p>
[QUOTE="Tazza, post: 7209, member: 82"] They are rated at about 475PSI new but i was told as low as 300 was about as low as it should be before starting is very hard and loss of power is an issue. One way to check for wear is to see how much blow-by you have. If there is a lot its probably a compression issue, if there isn't much its probably plugs or a relay. After a re-build mine was just over the 400 PSI mark, it still starts pretty easy with a 10-20 second glow. It blows a bit of white smoke at start up though. I think the piston to head height isn't quite rite. When its warm it runs well you said, no smoke? as it could be an injector issue if it blows excessive smoke. From what i was told about starting fluid is the modern stuff has lubricants in it unlike the old stuff that would damage engines from lack of lubrication. Its not a bad idea to check compression if you have the tools. As for glow plugs, its rare for them to burn out but it does happen. I had a set that when you hook them up to a battery they would only glow at the base of the thread, they had burnt down to a point at the end. You need the plug to glow from the tip to the base or it simply will not do the job. Remove the plugs and use a test cable and a battery and see if they glow correctly (watch your fingers, they get hot FAST). If they glow correctly throw them back in, the new ones won't work any better. Let us know how you go. [/QUOTE]
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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
1992 743B cold starting PAIN
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