A forklift must be inspected properly and given a test run before buying it. This applies particularly to trucks being purchased on the Internet. It is very vital to find potential issues with trucks bought from businesses on-line.
Be certain to start the engine from cold, and note the ease with which the engine turns over and whether there is excessive smoke. This is particularly vital with IC engine trucks.
The test run should include a check of the truck's performance in tough situations. An operator who is qualified could operate the truck in reverse and forward, up the ramp.
You can check an IC engine truck yourself. On a clear area of floor, run the truck around for a few minutes while a skilled driver tests the hydraulic functions. Then, look at the ground beneath for indications of fluid leakage. Even seemingly minor leaking can indicate serious problems that would be really pricey to repair later on.
A trained person should check the masts and chains. Check with and without a load that the mast works well. 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 seals, ram or valve.
If the truck is used, the mast may have been changed at some time. 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 hanger points or carriage are worn. Watch for cracks on the arms at heels and mountings.