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Pulling doubles
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<blockquote data-quote="slaveof18wheels" data-source="post: 586124" data-attributes="member: 10221"><p>In theory it would be possible with UPGF equipment but it would require a lot of extreme coincidences. 1st the kites spring brakes would not be working (ie-caged or improperly adjusted). 2nd on the dolly either leave the drain valve open or the regulator not functioning would allow the dolly to free wheel. 3rd leave the valves closed on the heavy there by keeping all the air in the tractor and the heavy. 4th throw in a bad hook from the dolly to the kite such as a bad fifth wheel or a "high" hook. 5th no PRETRIP! Add one dip in the road and you have a recipe for disaster. Pup dislodges and slides off and since everything is in free wheel mode from the heavy back it wouldn't bleed the tractor system.</p></blockquote><p></p>
[QUOTE="slaveof18wheels, post: 586124, member: 10221"] In theory it would be possible with UPGF equipment but it would require a lot of extreme coincidences. 1st the kites spring brakes would not be working (ie-caged or improperly adjusted). 2nd on the dolly either leave the drain valve open or the regulator not functioning would allow the dolly to free wheel. 3rd leave the valves closed on the heavy there by keeping all the air in the tractor and the heavy. 4th throw in a bad hook from the dolly to the kite such as a bad fifth wheel or a "high" hook. 5th no PRETRIP! Add one dip in the road and you have a recipe for disaster. Pup dislodges and slides off and since everything is in free wheel mode from the heavy back it wouldn't bleed the tractor system. [/QUOTE]
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