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<blockquote data-quote="SkidTracks" data-source="post: 137126" data-attributes="member: 5570"><p><strong>Follow-up:</strong></p><p></p><p>Found what I believe is root cause of all dust and dirt in chassis, cab, engine air-filter, cab internal & external air filters.</p><p></p><p>T86 engine cooling fan is running opposite direction from normal. Air is being pulled through louvers of rear door, and exhausted out perforated grill located on top of engine area.</p><p></p><p>Checking another T86, the air is pulled through perforated grill located on top of engine area, and exhausted out rear door louvers. </p><p></p><p>Result is some of fan's intake (as reversed) air is being pulled from front part of chassis below cab area. With cab sitting on top of front part of chassis, a small amount of air is being pulled in through cab too.</p><p></p><p>Instead of cab having positive pressure as designed, cab has negative pressure with engine running. Put another way, cab is under a slight vacuum as well as front part of chassis. Resulting in dust and dirt being pulled into chassis and into cab.</p><p></p><p>Testing: With right cab window slightly open and a trash bag taped around window:</p><p>When engine is running - trash bag is partially collapsed and sucked up against right cab window (cab is under a vacuum).</p><p>With engine stopped - trash bag is puffed outwards from cab window (cab under pressure, as it should be).</p><p></p><p>T86 came this way brand new from dealer.</p><p></p><p>Now to get dealer to take problem seriously. On three previous occasions when I inquired and reported there being a severe dust and dirt problem; I was rebuffed with comments like: <em>Dryer than usual. Usage of T86. R-series accumulate dust and dirt worse than M-series. Or some such. </em>Even with pictures and video, there was rebuff as to problem.</p><p></p><p>After reading about engine fan operation in manual; I do wonder what long term effects on entire machine are going to be, once problem is fixed.</p><p></p></blockquote><p></p>
[QUOTE="SkidTracks, post: 137126, member: 5570"] [B]Follow-up:[/B] Found what I believe is root cause of all dust and dirt in chassis, cab, engine air-filter, cab internal & external air filters. T86 engine cooling fan is running opposite direction from normal. Air is being pulled through louvers of rear door, and exhausted out perforated grill located on top of engine area. Checking another T86, the air is pulled through perforated grill located on top of engine area, and exhausted out rear door louvers. Result is some of fan's intake (as reversed) air is being pulled from front part of chassis below cab area. With cab sitting on top of front part of chassis, a small amount of air is being pulled in through cab too. Instead of cab having positive pressure as designed, cab has negative pressure with engine running. Put another way, cab is under a slight vacuum as well as front part of chassis. Resulting in dust and dirt being pulled into chassis and into cab. Testing: With right cab window slightly open and a trash bag taped around window: When engine is running - trash bag is partially collapsed and sucked up against right cab window (cab is under a vacuum). With engine stopped - trash bag is puffed outwards from cab window (cab under pressure, as it should be). T86 came this way brand new from dealer. Now to get dealer to take problem seriously. On three previous occasions when I inquired and reported there being a severe dust and dirt problem; I was rebuffed with comments like: [I]Dryer than usual. Usage of T86. R-series accumulate dust and dirt worse than M-series. Or some such. [/I]Even with pictures and video, there was rebuff as to problem. After reading about engine fan operation in manual; I do wonder what long term effects on entire machine are going to be, once problem is fixed. [I][/I] [/QUOTE]
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