If your not sure about any of this hire a professional tech to troubleshoot it and repair it. 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. Push the Chassis Lift Switch to the DOWN position and gradually lower the platform until the second mast section is supported by the block. If you get more than a trickle then you may have a bad control valve or check valve issue. Model: U元2 Type: Vertical Mast Man Lift / Personnel Lift Platform Height: 32 Ft 10 Meter Working Height: 38 Ft 11.7 Meter Load Capacity: 159 Kg 12V DC Battery Operated Machine Including Brand New Battery & Charger 4 Safety Outriggers Supported Price: Sold-out Call us for more information about subject machine or visit us on below address. You may get a slight bit but it shouldnt be alot. 178(e)(2) requires that if a load can fall back onto the operator the employer must equip the forklift with a vertical load backrest. 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. Question 1: Is the removal of the backrest extension originally attached when the forklift was received, a modification of the forklift under. 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. shop and field experience with all major brands of heavy equipment. what is the procedure to remove this ram Ask an Expert Car Questions Industrial Equipment Repair Dan Dan, Technician 15,853 Satisfied Customers 17+ yrs. But if it is still falling down while you have that lever pulled it sounds like an internal cylinder issue. I have a JCB 930 forklift that has a leak on the high lift hydraulic cylinder.
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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