How to adjust check the timing of the mechanical fuel pump

How to adjust check the timing of the mechanical fuel pump

To be able to check and modify the fuel supply advance angle, when production the diesel engine, the maker generally marks the timing at the corresponding position of the diesel engine and the Mechanical fuel pump:

 It refers to the fixed time range on the Mechanical gasoline pump coupling (or automated advancer) and the essential oil pump bearing cover. As long as both lining lines are aligned, it really is sure to be Enough time when the Mechanical fuel pump starts to provide oil to the first cylinder;

 The average person identifies the engraved series on leading end of the crankshaft. And a pointer on the front cover of your body;

For the multi-cylinder diesel engine,   the unloading advance placement of the oil supply can be confirmed. The meshing mark of the Mechanical gas pump and the corresponding transmission gear may be aligned following the diesel engine is definitely overhauled,  Person models also focus on the bond mark when setting up the Mechanical energy pump.

1. Check the oil supply timing on the device

 The timing of the essential oil supply could be inaccurate because of various circumstances. In this case, it is required to check on the timing of the oil supply.

(a) When one person swings the crankshaft to help make the I cylinder piston in compression stroke (ie, there exists a gap between the We cylinder inlet and the exhaust valve), when the set mark is merely aligned with the gasoline advance angle mark on the flywheel or the crankshaft belt wheel, prevent. Shake the crankshaft.

(b) For the 1st pump of the Mechanical fuel pump to begin the oil supply timing tag, check whether the fixed time line mark upon the coupling (or automatic advancer) is opposite to the scribed indicate on leading end of the pump casing. If the two marks are correct, the gas supply timing is correct; if the marking on the coupling hasn't however reached the pump casing marking, the essential oil supply time can be too past due;

For the coupling and the front end of the pump casing, there is absolutely no scribed mark. At the moment, the high pressure oil pipe of the Mechanical energy pump I will be removed, and one individual should convert the crankshaft. When it's about to reach the positioning of the essential oil supply advance position of the I cylinder, gradually crank the crankshaft. One individual gaze at the oil degree of the oil outlet of the I-cylinder store valve. When the essential oil level has simply moved upward, end cranking the crankshaft and check if the fuel supply enhance angle on the flywheel or crankshaft tape wheel is certainly reverse to its corresponding pointer ( For the capability of future inspection, a pair of timing marks could be put into the coupling and the pump casing.

2, installed calibration calibration oil timing

 The fuel supply timing should be checked.

(a) Rotate the crankshaft clockwise to ensure that the initial cylinder piston reaches the gasoline supply start position prior to the top dead middle of the compression stroke, that's, the fixed mark is aligned with the fuel supply advance angle mark on the flywheel or the crankshaft belt wheel.

(b) Turn the gas pump camshaft so that the fixed period line mark upon the energy pump coupling (or automated advancer) is usually aligned with the score tag on leading end of the pump casing.

(c) Push the Mechanical gasoline pump forward to ensure that the lug of the driven flange disc is definitely inserted into and involved with the coupling. When tightening both screws of the energetic flange disc and the intermediate flange disc, the two flanges ought to be made. The "0" indicate on the disc can be aligned, so that the fuel supply advance position of the diesel engine can be guaranteed.

3. Approach to adjusting the timing of oil supply

 If the fuel supply advance angle is available to be too little or too big, adjustments should be produced. Common adjustment strategies are:

(1) Rotating pump body adjustment

  There are 3 or 4 4 curved long holes on the triangular fixing plate and the flange. Utilize the above method to repair the Mechanical gas pump. If the essential oil supply timing isn't correct, merely loosen the corresponding three or four 4 repairing bolts, and rotate the pump body through the curved lengthy hole to adapt the oil supply progress angle.

When adjusting, the pump body is rotated simply by an position against the rotation direction of the driving wheel, to ensure that the fuel supply advance angle could be increased; if the pump body is certainly rotated along the traveling wheel, the energy supply advance angle can be reduced.

(2) Rotating pump shaft adjustment

 When adjusting the oil supply advance angle, both fixing bolts on the connecting plate could be loosened, and the gasoline pump camshaft can be rotated by one angle to increase the oil supply enhance angle; when the invert rotation direction is rotated by an position, the oil could be reduced. Small essential oil supply progress angle. After adjustment, tighten the two 2 repairing bolts on the linking plate.