A forklift must be checked correctly and given a test run prior to buying it. This applies especially to trucks being bought on line. It is essential to find potential issues with trucks acquired from companies on the Web.
Starting the engine from cold is a great idea. Note whether there is too much smoke and the ease with which the engine turns over. This is particularly vital with trucks which have IC engines.
The test run must include an inspection of the truck's performance in challenging situations. A trained operator could operate the truck in reverse and forward, 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 a few minutes while a skilled driver tests the hydraulic functions. After that, examine the ground underneath for indications of fluid leakage. Even seemingly minor leaking could indicate serious problems that would be pricey to repair later on.
A qualified person must inspect the chains and masts. Check with and without a load that the mast operates smoothly. Watch for sticking or 'binding' of the mast. A warning sign is play in the mast channels or between the fork carriage and mast. One more is creeping down or creeping forward of the mast when loaded. These could be symptoms of problems with ram, valve or seals.
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. Make certain 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 hanger points or carriage are worn. Watch for cracks on the arms at mountings and heels.