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3.2 Running-in of a New Tractor
A new tractor or a rebuilt tractor must be properly run-in so that the fitting and contacting surface of
the parts can be well contact with each other, resulting in that the tractor can withstand loads more
reliably without the early worn or damaging of the parts.
1. Preparations before Running-in
(1) Inspect and tighten all accessible bolts and nuts.
(2) Fill up lubricating oil, fuel and water to the rated level.
(3) Clean all external parts of the tractor.
2. Running-in of the Tractor
A. Idling running-in of the engine (10 min)
Start the engine according to the specified procedures. With the raising of water temperature and
oil temperature, gradually increase the speed. Carefully inspect whether there are leakages of
water, oil or gases. Listen to the engine for any abnormal noise. Be careful to watch the water
temperature gauge, oil pressure gauge, and ammeter to see if they are working normally.
B. Running-in of hydraulic hitch system (10min)
When the tractor is properly attached with its implement and the engine is kept at its rated speed,
operate the control handle and thus raise and descend the implement for at least 20 times.
To prevent possible damage of the implement, this test must not be carried out on ground with
hard surface.
C. Running-in of tractor without load (2 hours)(Table 3-2)
After starting the tractor according to specified procedures, run the tractor without load according
to the following specifications.
During running-in of the tractor without load, it is required to make turns both to the right and to
the left. It is also required to make turns with brakes. In such running-in procedures, the following
should be noted :
(1) Observe and listen to the engine, power trains, wheels and steering system to see whether they
are working properly.
(2) Notice whether the clutch, brake and gear – shifting are working normally and conveniently.
(3) Observe whether the instruments, meter and the electric equipment are working normally.
When any abnormality or troubles are found, they shall be analyzed immediately to find out the
causes. Then only after removal of the troubles, can the running-in procedure be resumed.
D. Running-in of tractor with load (48hours)
Running-in the tractor with load is the procedure that make tractor to work with a certain load.
Load and speed must be increased from low to high as specified in the Table 3-3
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