A forklift should be checked well and given a test run prior to buying it. This applies particularly to trucks being obtained on-line. It is very vital to find possible problems with trucks obtained from businesses online.
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 specifically crucial with IC engine trucks.
The test run must include an inspection of the truck's performance in tough situations. An operator who is qualified could maneuver 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. After that, examine the ground beneath for indications of fluid leakage. Even seemingly insignificant leaking can lead to serious issues which would be really costly to fix later on.
The chains and masts should be checked by a trained individual. Check with and without a load that the mast operates well. 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 down or creeping forward of the mast when loaded. These can be symptoms of issues with valve, seals or ram.
If the truck is not new, 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. Make sure 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 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.