This type of mast is frequently seen in outdoor applications where overhead clearance is not a concern, due to the lack of height clearance restrictions.
#Forklift mast free
Free lift (the ability to lift the load and forks without moving the mast channels) is not available.ĭue to this limitation, the mast must extend higher than other mast options in order to stack loads. Single Stage: The single-stage mast has one channel with a limited lifting height. Forklift Mast Types Single-stage mast forklift
Below defined the four basic types of uprights and masts: standard, duplex, triple stage, and quad. Understanding the types of masts available and what each can do is helpful for selection. This may be a question posed to you during your next forklift purchase. What type of mast do you need for your forklift? This feature allows horizontal movement of the forks to more precisely pick and place loads in less time. This feature is imperative for double stacking in a trailer.Īnother feature that is an option but is now considered essential to most users is “side shift”. From a simple direct lift to multiple channel staging, each mast type has features that enhance performance or extend the application range of the lift truck.įree lift is the distance that the carriage will raise prior to the inner channel extending. Pulling the mast lever on the cowl raises the load by actuating that piston, thus lifting the forks and your load.Īll masts lift by hydraulic displacement and lower by the force of gravity. The carriage is actuated by the hydraulic piston in the middle of the mast. The channels are similar in appearance to I-Beams.Īttached to the mast is the carriage. Most masts are ‘three-stage’ meaning there are three channels on each side.
#Forklift mast professional
If your not sure about any of this hire a professional tech to troubleshoot it and repair it.Forklift Mast Types: Also referred to as an ‘Upright’, the mast is the vertical assembly on the front of the forklift that does the work of raising, lowering, and tilting the load. Not to mention the forks will be comming down quickly too! By all means DO NOT loosen the pressure line while it is up in the air, that is very dangerous and will get you wet with oil in the process. Now when i say return line i DO NOT mean the line going from the control valve to the cylinder, i mean the big hose going from the control valve back to the tank. If you get more than a trickle then you may have a bad control valve or check valve issue. You may get a slight bit but it shouldnt be alot. There is one test you can do, when you have it raised up pull the return line off and see if there is any drainback. If when you raise it all the way up and leave it for a while see if it bleeds down then, when raising it up to the top it might be putting enough pressure on the cylinder to hold it there temporarily? or just applying enough pressure on the packing to expand it and then it holds. But if it is still falling down while you have that lever pulled it sounds like an internal cylinder issue.
The thing about it slowing down when you pull the lift lever is only that it is applying pressure to the cylinder trying to raise it back up. My best guess is you have some packing issues in the cylinder allowing the rod packing to bypass. My guess is since it is what you say a "single cylinder" that it is a multistage telescopic cylinder? or is this just a simplex mast freelift (does not go up very high) If its dropping 10ft in 10 seconds you have a serious issue
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