A forklift must be checked properly and given a test run prior to buying it. This applies especially to trucks being purchased online. It is important to find possible issues with trucks acquired from businesses on line.
Starting the engine from cold is a great idea. Note whether there is excessive smoke and the ease with which the engine turns over. This is particularly crucial with trucks that have IC engines.
Testing the performance of the truck in challenging situations must be included in the test run. An operator who is qualified could operate the truck in forward and reverse, 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 trained driver tests the hydraulic functions. Then, look at the ground underneath for signs of fluid leakage. Even seemingly minor leaking could indicate serious problems which will be very costly to repair 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 sign is play in the mast channels or between the fork carriage and mast. One more is creeping down or creeping forward of the mast when loaded. These can be signs of problems with ram, valve or seals.
If the truck is used, the mast might have been changed at some time. Make sure that the mast and any fitted attachments adhere to 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 can mean the hanger points or carriage are worn. Watch for cracks on the arms at mountings and heels.