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Mast stuck in raised position_Yale GLP 050

I have a Yale GLP 050, the crew was using it today and raised the mast to the full up position. Now the truck will lower to the bottom of the top mast, but the top mast won't lower. If you raise it to the full up position the left lifting chain on the main cylinders will get slack but the right one stays tight. Does this unit have check valves on the cylinders? what else should i look at?
Thanks!

• Posted 23 Mar 2010 12:44
• Discussion started by Gearhead63
• Texas, United States

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Yep, it was jammed for sure.Had to get our Cat 955 loader to put downward pressure on the forks, got it loose, greased up everything and adjusted the lift chains.Works good, for now! Thanks for the input!

• Posted 24 Mar 2010 09:50
• Reply by Gearhead63
• Texas, United States

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The most likely cause is that the section that won't lower is jammed. This can happen if the mast is not lifted to full height very often or if there is a build up of debris in the channels.

• Posted 24 Mar 2010 04:15
• Reply by AndyPandy
• Staffordshire, WM, United Kingdom

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