Baotou North heavy truck parts fuel injection pump diesel engine fuel supply system is the heart”. Fuel injection pump precision coupling card lag, will cause the engine speed is not stable, serious will cause engine flameout and car accident.
Fuel injection pump stuck reason
The old fuel pump, which causes stagnation card for diesel is not clean, there are mechanical impurities between the plunger and the plunger, and the plunger and the plunger sleeve surface is pulled, or plunger bump top corner being generated by burr.
For the new fuel injection pump, the reasons for the stagnation of the following:
(1) at present, some fuel injection pump manufacturers and maintenance units do not pay attention to the selection of high quality diesel oil in the adjustment of injection pump. In this way, a residual oil film is attached to the surface of the fuel injection pump precision coupling parts. If the fuel pump is stored for too long, this layer of oil film will gradually produce organic sediment and glue, after the installation will be stuck phenomenon.
(2) the poor storage and storage of the fuel injection pump, the packing is not strict, the damp proof and anti rust material is missing or damaged, the damage or loss of the oil pipe joint dust cap, etc..
Card lag processing
For the use of the old fuel injection pump, can be found to be blocked by the plunger coupling and removed, with clean diesel cleaning. If the plunger parts are mechanical impurities, can be used to clean the oil mill. If the plunger top is knocking burrs (the naked eye is difficult to observe), when the plunger plunger sleeve top indentation would send acerbity hairpin, must not be repeated rotation or drawing the plunger, the plunger sleeve to avoid burr scratch. The correct approach is: the top edge of the plunger to pull the plunger and the plunger into the center of the oil hole flush, slowly rotating plunger, then there will be a sense of block. When a position to block a sense of loss, which form the column plug top edge position just bump into a hole in the plunger. Remember this position, the plunger top edges introduced plunger sleeve, with fine sand bump grinding parts. Grinding, the fine sand plane is 45 degrees with the plunger axis, gently push pull a few, in order to eliminate the burr edges can be. But not too much grinding, so as not to affect the cylinder oil supply angle and the consistency of the oil supply.
For the new fuel injection pump, the following methods can be used:
(1) to the Baotou beiben heavy truck parts injection pump governor and injected amount of petrol or diesel, turn the camshaft, so that fuel injection pump and governor tappet fly ball parts move freely, prevent rust issuers, leading to runaway of diesel engine.
(2) for the fuel pump, lower body decomposition (such as the use of 485, 695, 4125, 6130 and other models I, II and III injection pump), the pump body is flat, open the side cover, remove the pump head of the fastening nut, remove the pump head pliers grip plunger root slowly, taking the fault cylinder piston and spring (note shall not damage the plunger), repeated washing with clean gasoline or diesel, wash after loading complex (note the plunger control arm must be placed inside, and adjusting fork) alternately tighten the pump head nut, turn the camshaft, the pump handle review.
(3) the overall type fuel injection pump (such as the use of 6110, 6135, 6160 other models A, B type pump), open the side cover, turn the Baotou beiben heavy truck accessories camshaft with a screwdriver is inserted into the card plunger gently Tonelli leveraging spring, forcing the plunger down after reset to the exposed plunger sleeve the plunger root injection of clean gasoline or diesel, and the rotation of the camshaft. When the piston reciprocating motion is free to move around the two rack sensitive, put clean oil, the governor shell into the amount of clean oil.