Increasing and decreasing the role of spacers in the maintenance of walking tractors

The addition and subtraction of the spacer is an additional repair method. If it is used properly during the maintenance of the hand tractor, satisfactory results will be achieved. It can be described as less costly and effective.

1Gasket increase and decrease in diesel engine

(1) High-pressure oil pump The adjustment of the fuel supply time of the diesel engine using the single piston type oil pump is achieved by increasing or decreasing the gasket. If the fuel supply time is too early (large advance angle), the diesel engine will have a “dangling” cylinder knock sound, start reverse easily, power shortage, etc., can increase the oil pump gasket. If the oil supply time is late (small advance angle), the phenomenon is that the engine sound is dull, the mixture gas is incompletely burned, the exhaust gas is smoked, and the work is weak. The gasket can be subtracted.

(2) When the oil pump is replaced with a new oil pump or the lower balance shaft, sometimes the head of the inner and outer rotor shafts of the oil pump is tightly fitted with the small groove at the lower balance shaft end (because the depth of the shaft groove is not enough), after tightening the oil pump, the rotor shaft Under the top dead balance shaft, then you can increase the appropriate gasket, the following balance shaft rotation is appropriate. After working for a period of time, if there is insufficient oil pressure, and there is no obvious wear on the inner and outer rotors, boring heads and lower balance shaft grooves of the oil pump, the oil pump gasket can be properly reduced.

(3) The main bearing cover is replaced with a new crankshaft, main bearing bush or main bearing cover, etc. Sometimes the crankshaft is over-tightened. When the flywheel is pushed and pulled by hand, there is no axial clearance and the main bearing cover pad can be installed. During the work, if there is a small amount of axial rocking of the flywheel, oil leakage from the crankshaft oil seal (508013), remove the V-belt, and push and pull the flywheel by hand to find that the axial clearance is too large, and reduce the gasket.

(4) If the speed of the thrust bearing works, the speed of the diesel engine may fluctuate (commonly referred to as traveling), the fuel consumption is large, the combustion may be incomplete, the exhaust may emit black smoke, etc., which may be the clearance between the speed governing disk and the thrust bearing. Increase the cause. A 1 mm thick gasket can be added between the sliding plate and the thrust bearing. Sometimes when the gasket is too thick, it will not increase the throttle, and it will not reach the required rotation speed. The gasket should be properly cut.

(5) The cylinder head cover may be due to casting errors. Sometimes the cylinder head cover is replaced. The decompression shaft head presses the intake valve, causing the cylinder to have no compressive force. This can be solved by adding a cylinder head cover gasket.

2 gaskets on the chassis increase or decrease

(1) Actual operation of the drive wheel bearing housing When replacing a new drive shaft or bearing housing, excessive tightening of the drive shaft will occur, especially when the tapered roller bearing is used, and the top pressure is tighter. This is due to the bearing seat gasket is too thin, should be installed with a suitable thickness of the bearing seat gasket, how much pad to push and pull the hub without axial clearance, hand steering steering handle, turn the drive shaft can rotate freely. After working for a period of time, due to the abrasion of the bearings, the turning clearance increases, and the gasket should be properly evacuated.

(2) Some springs and seals padded the gear shifting positioning springs in the gearbox. The working time is long, the springs become shorter and softer, or a small amount breaks, and the phenomenon of automatic disengagement occurs. If you cannot buy a new spring (actually it is not always necessary to buy a new one), you can add a small pad at the bottom of the positioning hole of the fork or use a thin cloth to push the small circle and push it in to make the spring slightly exposed. Outside the hole, the use continues to work well. When the sealing rubber ring of the steering fork and the like is worn out in series, the original apron can be pulled out, and one or two layers of fine cloth strips are wound on the fork sealing groove, and then the original sealing rubber ring can be installed to prevent the oil from sticking.

(3) Fork shaft plus pad to buy a new auxiliary gear, a reverse gear or two or three gear fork shaft, sometimes encounter the new shaft is shorter or longer, the positioning groove on the shaft and the corresponding gear position deviation . Longer times can be sawed or sanded to the longer part, but the fork shaft should be placed on the gearbox body to determine which head to saw. The positioning groove deviates from the corresponding gear position, that is, when the positioning steel ball falls into the positioning groove, and the gear meshes incompletely, the force is automatically disengaged. If a reversing fork shaft groove is over the right side, the left end of the fork shaft can be polished 1~2 mm, and a corresponding light pad is added at the right end to move the fork shaft to the left to adjust the correspondence between the positioning groove and the corresponding gear. position. If the fork shaft is too short, you can add a light pad inlet pump Caster red wine with an outer diameter of 10~12 mm.

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