A forklift should be inspected well and given a test run before purchasing it. This applies specifically to trucks being purchased on-line. It is important to detect potential problems with trucks bought from businesses on the World Wide Web.
Be sure to start the engine from cold, and note the ease with which the engine turns over and whether there is too much smoke. This is especially crucial with IC engine trucks.
The test run must include an inspection of the truck's performance in tough situations. A trained driver can drive the truck in reverse and forward, up the ramp.
You can 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 qualified driver tests the hydraulic functions. Afterward, look at the ground beneath for indications of fluid leakage. Even seemingly insignificant leaking can indicate serious problems which would be really pricey to repair later on.
A skilled person should check the masts and chains. Check with and without a load that the mast operates smoothly. Watch for 'binding' or sticking of the mast. A warning indication is play in the mast channels or between the fork carriage and mast. Another is creeping forward or creeping down of the mast when loaded. These could be symptoms of problems with seals, ram or valve.
If the truck is not new, the mast may have been changed at some time. Make certain 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 wear or damage should be included in the inspection. The manufacturer of the truck specifies minimum thickness. A loose fit could mean the hanger points or carriage are worn. Look for cracks on the arms at heels and mountings.