A forklift should be checked properly and given a test run prior to purchasing it. This applies especially to trucks being purchased online. It is very essential to find possible issues with trucks obtained from businesses online.
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 specifically crucial with trucks which have IC engines.
The test run must include a check of the truck's performance in tough situations. A qualified driver could maneuver the truck in forward and reverse, up the ramp.
You could perform your own inspection of an IC engine truck. On a clear part of floor, run the truck around for several minutes while a skilled driver tests the hydraulic functions. After that, look at the ground underneath for indications of fluid leakage. Even seemingly minor leaking can lead to serious issues that will be really pricey to fix later on.
The masts and chains should be inspected by a qualified individual. Check with and without a load that the mast works well. Watch for 'binding' or sticking of the mast. A warning sign is play in the mast channels or between the fork carriage and mast. One more is creeping forward or creeping down of the mast when loaded. These can be symptoms of issues with valve, seals or ram.
The mast may have been changed at some time if the truck is not new. 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 checking the forks, look closely at the heel thickness for damage or wear. The manufacturer of the truck specifies minimum thickness. A loose fit might mean the carriage or hanger points are worn. Look for cracks on the arms at mountings and heels.