Agriculture Reference
In-Depth Information
When buying a used tractor, bring a checklist with you and make notes about poten-
tial problems that require repair.
Do you see oil leakage around the head gaskets?
The gaskets might need to be replaced
(not a big deal), or the heads might be warped or cracked (a big deal).
What is the oil pressure reading on the gauge on start-up and when hot?
If the gauge
does not work, have a mechanic test the oil pressure for you. Oil pressure is higher when
the oil is cold and thick and drops as the oil warms up and thins down. A gas engine tractor
should carry at least 15 pounds of oil pressure when warm; a diesel, 20 pounds.
What is the engine compression test result?
To get an idea of the condition of the en-
gine, have a compression test performed on each cylinder. The results, when interpreted by
a competent mechanic, can indicate the condition of the cylinders, pistons, and rings, as
well as valves and gaskets.
Does the clutch work well?
There are two ways to test the clutch. First, with the tractor
running, push in the clutch and put the tractor in gear. If it grinds, this could mean the clutch
is on its way out. Next, put the tractor in low gear, and with your foot on the brakes, let out
the clutch. The engine should lug down and die. If, instead, the clutch slips and the engine
keeps running, that means the clutch is shot or close to it.
