A forklift must be checked well and given a test run prior to buying it. This applies particularly to trucks being bought on the World Wide Web. It is really vital to find potential problems with trucks bought from companies on line.
Starting the engine from cold is a good idea. Note whether there is excessive smoke and the ease with which the engine turns over. This is particularly essential with IC engine trucks.
Testing the performance of the truck in tough situations must be included in the test run. A trained operator can operate 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 skilled operator tests the hydraulic functions. Then, examine the ground underneath for indications of fluid leakage. Even seemingly insignificant leaking can result in serious issues that will be expensive to fix later on.
The masts and chains should be inspected by a trained person. Check with and without a load that the mast operates smoothly. Watch for 'binding' or sticking of the mast. A warning sign is play in the mast channels or between the fork carriage and mast. Another is creeping down or creeping forward of the mast when loaded. These could be symptoms of issues with ram, valve or seals.
The mast might have been changed at some time if the truck is used. Make sure that the mast and any fitted attachments follow the rating plate on a truck. Check that the sideshift is not sticking when loaded.
When inspecting the forks, look closely at the heel thickness for wear or damage. The truck's manufacturer specifies minimum thickness. A loose fit might mean the carriage or hanger points are worn. Look for cracks on the arms at heels and mountings.