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锘縮hangchai diesel engine fuel injection pump troubleshooting methods
Update:2017-02-18 Tags:the

shangchai 6135 type diesel engine parts with B type plunger type fuel injection pump as a whole. It through the four bolts fixed on the bracket on one side of the engine block, diesel engine crankshaft by timing gear drive, and the fuel injection pump fuel injection pump camshaft drive shaft connected by coupling. Fuel injection pump of CAM lift to 10 mm, cylinder center distance of 40 mm, fuel injection pump turn biggest ran at 1000 r/min. Due to the fuel injection pump working conditions of high speed and & other 4 support & throughout; Form of installation and use of maintain undeserved wait for a reason, easy to cause the fuel injection pump and the bracket attaches pump external circular arc surfaces wear (stent relatively few arc surface wear), the pump body down, CAM shaft axis and the fuel injection pump drive shaft axis deviation. Fuel injection pump camshaft by torsion, bending and swinging forces such as additional alternating stress, eventually leading to the camshaft fatigue fracture.

troubleshooting methods, general is in a fix. Type 6135 B type diesel engine fuel injection pump camshaft shaft neck surface roughness is not greater than Ra0.32, hardness is not lower than HRC45, cylindricity tolerance is 0.10 mm, total length of straightness tolerance is 0.05 mm. If can't find the cause of the CAM shaft fracture, bound to lead to fracture again. The spot has three kinds of emergency repair methods.

(1) the original repair method

the root cause of the CAM shaft rupture is the fuel injection pump of the pump body wear. Therefore, can use electric welding, brazing of pump body take & other; Pile & throughout; Methods for welding, the thickness of the pile and area is slightly larger than wear. With sharp cutting and grinding method after welding to welding parts polishing draw, restore original pump body geometry, cleaning all parts, machine can be used after debugging. Original repair method can also use the metal rubber filling method, to repair of the fuel injection pump pump body, which is prepared metal plastic coated in the region of the wear and tear, the thickness of the metal rubber coating, and area slightly larger than wear metal glue solidified after 20 ~ 30 min, area of rubber coated with metal grinding polishing, cleaning all parts, machine can be used after debugging.

(2) parts to spell

type 6135 B type diesel engine fuel injection pump of the pump body material is cast iron or aluminum alloy commonly, although the material is qualitative different, its installation dimensions and internal structure. In plastic scrap, therefore, the type 6135 B type diesel engine fuel injection pump, according to the need to remove can make use of the pump body, CAM shaft and other parts, assembled into a complete B type fuel injection pump, used after qualification adjustment of the machine.

(3) additional parts

under field conditions, can't use & other; The original repair method & throughout; And & other Parts spelling & throughout; When, can use & other; Additional parts throughout method &; . Specific method is: (1) with the file and worn parts grinding polishing cloth will pump body (wear parts for fitting surface with stents, and depends on the fuel injection pump drive shaft end wear serious); (2) with the depth of the pump body wear parts of the caliper measurement after grinding depth of wear depth general between 5 ~ 1 mm; (3) made additional gasket, copper or iron thickness is based on the depth of wear parts to determine the size of the measurement, width is about equal to the thickness of the bracket, the length of the wear parts of the arc length is approximately equal to the pump body; (4) attach making good gasket between the bracket and pump body of wear parts, quantity should be according to the measured depth of the wear parts to ensure that the should not be commonly more than 3 pieces; 5. Start the test after to install.

type 6135 B type diesel engine fuel injection pump pump body wear mainly because of the pump body and the stent due to the relatively loose. Therefore, can be prevented from the following three aspects.

(1) to correct installation

when installation should pay attention to the following: (1) fixed bolts should be diagonal set. If you set the lateral or rely on the two bolts on one side of the body, on the one hand may change the fuel delivery advance Angle adjusted, on the other hand may cause the fuel injection pump camshaft axis offset to the pump drive shaft axis, the camshaft is directly attached alternating stress and fatigue fracture. (2) fixed bolts should be 2 ~ 3 times of set. (3) fixed bolt tightening torque should be 1.5 ~ 2.5 N鈥?M between. (4) fixed bolts shall be set in place. As close to the body side of the two fixed bolt set due to installation position limit does not reach the designated position, the outside of the two fixed screw to tighten the excessive.

(2) to maintain proper

in the use of maintenance process should pay attention to the following three points: (1) in the fuel injection pump oil quantity and quality to conform to the requirements. Such as poor lubrication, light make the driving part inside the pump of premature wear and tear, or make the bearing jammed, CAM to twist off. (2) the CAM shaft axial clearance should be appropriate, general is 0.03 ~ 0.15 mm. Clearance is too large, the camshaft wear faster, diesel engine running is not smooth, cause premature wear of the pump body. (3) of the fuel injection pump fuel delivery advance Angle and Angle of each cylinder oil intervals to conform to the requirements, otherwise not only can make the power performance and fuel economy of diesel engine, and will cause the diesel engine start the hard times, the operation is not smooth, cause the pump body wear faster.

(3) check to timely

type 6135 B type diesel engine fuel injection pump pump body stents and loose condition, generally at the weekly maintenance check. If found abnormal situation or diesel engine pump body loose phenomenon, should check in time is tight.

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