Prior to buying a forklift truck, you must make sure that it is properly inspected and given a test run. This applies especially to trucks being purchased on-line. It is really essential to detect potential issues with trucks acquired from companies on-line.
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 particularly vital with IC engine trucks.
The test run should include a check of the truck's performance in challenging situations. An operator who is trained can drive the truck in forward and reverse, up the ramp.
You could 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 skilled driver tests the hydraulic functions. Then, look at the ground underneath for signs of fluid leakage. Even seemingly minor leaking can lead to serious issues which will be costly to fix later on.
The masts and chains should be inspected by a trained person. Check with and without a load that the mast operates smoothly. 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 could be signs of issues with ram, valve or seals.
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.
When inspecting the forks, look closely at the heel thickness for damage or wear. 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 heels and mountings.