A forklift must be checked well and given a test run prior to buying it. This applies specifically to trucks being acquired on the Internet. It is important to detect potential problems with trucks bought from businesses online.
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 specifically crucial with IC engine trucks.
Testing the performance of the truck in challenging situations must be included in the test run. An operator who is trained can drive the truck in reverse and forward, up the ramp.
You could inspect an IC engine truck yourself. On a clear area of floor, run the truck around for a few minutes while a trained driver tests the hydraulic functions. Afterward, examine the ground beneath for indications of fluid leakage. Even seemingly minor leaking can result in serious issues which would be pricey to repair later on.
The masts and chains should be checked by a skilled person. 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. Another is creeping down or creeping forward of the mast when loaded. These can be signs of issues with ram, valve or seals.
If the truck is used, the mast might 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 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. Watch for cracks on the arms at heels and mountings.