A forklift should be inspected well and given a test run prior to buying it. This applies particularly to trucks being obtained on-line. It is important to find potential issues with trucks obtained from businesses online.
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 essential with IC engine trucks.
Testing the performance of the truck in challenging situations should be included in the test run. A qualified driver can drive the truck in forward and reverse, up the ramp.
You can check an IC engine truck yourself. On a clear area of floor, run the truck around for several minutes while a qualified driver tests the hydraulic functions. After that, examine the ground underneath for signs of fluid leakage. Even seemingly minor leaking can result in serious problems that would be expensive to repair later on.
The masts and chains should be inspected by a skilled person. 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 mast and fork carriage. Another is creeping down or creeping forward of the mast when loaded. These could be signs of problems with valve, seals or ram.
The mast might 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. Check that the sideshift is not sticking when loaded.
Looking closely at the thickness of the heel for damage or wear must be included in the inspection. The truck's manufacturer specifies minimum thickness. A loose fit might mean the hanger points or carriage are worn. Watch for cracks on the arms at mountings and heels.