A forklift should be checked correctly and given a test run prior to purchasing it. This applies specifically to trucks being bought on line. It is really important to find potential problems with trucks obtained from businesses on the World Wide Web.
Starting the engine from cold is a great idea. Note whether there is excessive smoke and the ease with which the engine turns over. This is particularly crucial with IC engine trucks.
The test run must include an inspection of the truck's performance in tough situations. A driver who is qualified could maneuver the truck in forward and reverse, up the ramp.
You could carry out your own inspection of an IC engine truck. On a clear area of floor, run the truck around for a few minutes while a qualified operator tests the hydraulic functions. Then, examine the ground underneath for indications of fluid leakage. Even seemingly insignificant leaking can indicate serious issues which would be pricey to repair later on.
A qualified person should check the chains and masts. Check with and without a load that the mast works smoothly. Watch for 'binding' or sticking of the mast. A warning indication is play in the mast channels or between the mast and fork carriage. Another is creeping down or creeping forward of the mast when loaded. These can be symptoms of issues with valve, seals or ram.
If the truck is used, the mast might have been changed at some time. Make sure that the mast and any fitted attachments adhere to the rating plate on a truck. Check that the sideshift is not sticking when loaded.
Looking closely at the thickness of the heel for damage or wear should be included in the inspection. The manufacturer of the truck specifies minimum thickness. A loose fit can mean the carriage or hanger points are worn. Look for cracks on the arms at heels and mountings.