Do-it-yourself KamAZ fuel equipment repair

Fuel injection pump KamAZ is a mechanism designed to supply fuel fluid to the cylindrical mechanisms of the engine.

The injection pump device includes mechanisms such as:

• pump compartment housing;
• high pressure fuel pump bearing cover housing;
• pumping hose;
• plunger pair and plunger pusher;
• spring elements;
• mode selector and coarse and fine filters;
• the union of the fuel fluid drain and injection system;
• fuel injection regulator;
• pressure reducing valve;
• an electromagnetic valve, which is necessary to shut off the fuel supply;
• rail, nozzle and half-coupling.

The principle of operation of the injection pump is as follows:

1. The movement is set from the crankshaft mechanism by means of a mechanical transmission.
2. The cam shaft begins to rotate. This rotation causes the pushing elements to move.
3. The pushers begin to compress the special springs.
4. The springs cause the plunger to start and raise it.
5. The plunger obstructs the inlet-type valve and displaces the fuel fluid.
6. The fuel starts to be atomized using the nozzles.
7. The plunger is lowered and opens the intake mechanism.

The non-return valve is located on the fuel rail between the fuel tank and the injectors.

Repair of the KamAZ fuel injection pump can be done independently if you have the necessary tools and equipment.

The main malfunctions of the injection pump and the reasons for their occurrence:

1. Water in the fuel mechanism. This breakdown may indicate a malfunction of the fuel filter element, diluted fuel, leakage of fuel drives.
2. Reduced and uneven supply of working fluid. In this case, it is recommended to check the plunger for damage, and also to inspect the discharge type valves, rack clamps. Check the flow capacity of the injectors.
3. Diesel fuel leaves. The cause of this breakdown may be a violation of the tightness of the fuel drive. The damaged element must be replaced.
4. The drive is tearing. It is recommended to inspect the crankshaft, as well as the main components of the power unit for damage and foreign bodies.
5. Delay of the system of injection of working fluid. Such a malfunction can be caused by damage to the plane of the adjusting bolt of the pusher element, the roller axis and malfunctions of the camshaft rotation frequency.

1. Remove the terminal from the battery.
2. Dismantle the radiator.
3. Remove the vacuum pump.
4. Remove the dipstick guide tube.
5. Remove the oil filter filter mechanism.
6. Turn crankshaft in direction of rotation until stop.
7. Disconnect fuel drives.
8. Remove the vacuum hose.
9. Block the crankshaft against turning.
10. Loosen the bolt in the center of the coupling.
11. Remove chain tensioner.
12. Pull out the pump by removing the fuel oil pedal actuator.

Disassembly of the KamAZ injection pump is done as follows:

1. The metering valve must be removed from the end of the pump housing. To do this, unscrew the pressure plate bolts, release the advance valves of the injection system.
2. Then you should remove the fasteners on the top cover.
3. You need to disassemble the control board after gaining access to the electronics.
4. It is necessary to set the required position of the crankshaft.
5. Then you need to dismantle the bearing using special equipment.
6. Finally, rinse all parts and polish their surfaces.

Adjusting the Bosch injection pump on KamAZ makes it possible to add fuel, i.e. set the required value of the fuel fluid supply.

Procedure for reducing fuel:

1. Using a 13 key, you need to adjust the air flow to the mechanisms of the power unit. Thanks to this, the diesel will be able to mix with air.
2. Adjust the corrector and run the motor for testing.
3. If necessary, you need to additionally turn up the air flow until the smoke stops pouring.

In order to add fuel to the fuel injection pump of KamAZ (Euro-2 or Euro-3), you need to do the following:

1. Tighten the special screws located in the upper and lateral parts of the working fluid supply.
2. While unscrewing the bolts, it is necessary to increase the gap for the passage of the combustible mixture. This will help to normalize the performance of the power unit and the high pressure fuel pump lubrication system.
3. After increasing the hole diameter, start the engine and check the operation of all systems.

The installation (assembly) of the fuel pump must be carried out on special equipment.

In order to properly supply and install a high-pressure fuel pump on KamAZ, do the following:

1. The vehicle is installed on a special platform.
2. The driven clutch is mounted on the advance clutch and everything is secured with bolts.
3. Turn the clutch so that the bosses of the driven-type half-clutch are in a horizontal position, and the mark on the end part is in the area of ​​the indicator.
4. Install a flange complete with a driving half-coupling and plate packs. The flange should be on the left side of the body.
5. The fuel pump is installed on the engine together with the coupling and everything is secured with mounting bolts.
6. Before tightening the bolts, adjust the flatness of the plate packs by moving the flange along the drive shaft.
7. The pump is mounted on a block of cylindrical elements in a vertical position, preventing its blockage.
8. Connect the sections of the high pressure fuel pump with injectors.
9. Adjusts the advance angle of the injection system.
10. Check for the presence of oil in the injection pump housing.
11. Connect the oil inlet and outlet pipes.

Purchase and rent price of injection pump:

• purchase - from 17,500 rubles;
• this vehicle part cannot be rented.

Vladimir, 39 years old, Magnitogorsk: “I have been working at KamAZ-53215 for the second year already. Problems have recently started with the high pressure fuel pump. A version according to the Euro-3 standard was installed, and the injection pump had to be replaced ”.

Vitaly, 41 years old, Vladivostok: After 4 years of KamAZ operation, a fuel fluid leak began. The cause of the breakdown was the broken tightness of the fuel drive and pump.

The repair was done quickly, tk. all parts are easy to find.

Mikhail, 53 years old, Krasnodar: “The truck is equipped with a high-pressure fuel pump according to Euro-4 standards. The problems began after 2 years of operation. All breakdowns were associated with an uneven supply of working fluid. The repair was entrusted to specialists in the service center. "

Oleg, 35 years old, Tver: “Recently this part had to be replaced at KamAZ-54115. The purchase of a new part cost 20,000 rubles. I installed it myself, following all the recommendations specified in the instructions. "

Leonid, 48 years old, Yekaterinburg: “Water appeared in the fuel pump. I had to disassemble the injection pump. The cause of the malfunction was the filter element, which was replaced. Everything is working properly now. "

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To remove the high-pressure fuel pump of the injection pump Kamaz-740:

- disconnect the cables for manual control of the engine stop lever and the regulator control lever, the fuel control rod, the fuel supply pipelines to the pump, the outlet, drainage pipelines and the pipeline from the fine fuel filter, the oil supply pipe to the pump, the oil outlet pipe;

- unscrew the two bolts of the driven coupling half (to unscrew the bolts, move them to a convenient position by turning the crankshaft with a crowbar over the holes on the flywheel through the clutch housing hatch);

- disconnect the pipelines supplying fuel to the pin plugs, high pressure pipelines (remove them), the air supply pipe to the auxiliary brake system valve;

- remove the four bolts of the fuel pump;

- remove the pump of the injection pump Kamaz-740.

To install the injection pump Kamaz-740:

-Check the crankshaft to the position corresponding to the beginning of fuel injection in the first cylinder (the retainer is in engagement with the flywheel);

- in this case, the keyway of the driving half of the drive coupling must be located:

a) below, for engines mod. 740.11-240 and mod. 740.14-300;

b) in a horizontal position on the left, when viewed from the flywheel side for the engine mod. 740.13-260;

- install the fuel injection pump Kamaz-740 on the engine, while combining:

a) marks on the pump body and fuel injection advance clutch, for engines of models 740.11-240 and models 740.14-300;

b) an alignment mark on the flange of the driven coupling half with a pointer on the injection pump housing for the engine of modification 740.13-260;

- tighten the pump mounting bolts as shown in the figure:

The order of tightening the bolts of the fuel injection pump KamAZ

- without disturbing the relative position of the marks, tighten the upper bolt of the driven half of the drive coupling, move the retainer into the shallow groove. turn the crankshaft one turn and tighten the second bolt of the driven half of the coupling;

- install the hatch cover of the clutch housing;

-Connect the high pressure pipelines, the oil supply pipe to the KamAZ injection pump and the oil outlet pipe, the air supply pipe to the auxiliary brake system valve, the low pressure pipelines, the fuel control rod, the cables for manual control of the stop lever and the regulator control lever.

After installing the KamAZ high-pressure fuel pump, start up the engine and with bolt 2 (Fig. High-pressure fuel pump regulator cover) adjust the minimum idle speed, which should be 600 ± 50 min-1.

When repairing the injection pump Kamaz-740:

- replace the pump casing with cracks and breaks in the main threads;

- For plunger sleeve defects, include chipping and chipping of metal at the holes, scuffing, scratches, wear of the working surface, an increase in the diameter of the inlet and cutoff windows, cracks and weakening at the landing sites (chipping, metal chipping and cracks are irreparable defects).

Measure the wear of the working surface of the plunger sleeve with an accuracy of 0.001 mm, ovality, taper and enlargement of the sleeve bore - with a micrometer or indicator device for measuring internal surfaces with a graduation of 0.001 mm and tapered gauges;

- For plunger defects, include metal chipping and scratches on the working surface, wear of the working surface and cracks. Determine the distortion of the plunger geometry with a minimeter with an accuracy of 0.001 mm when setting its arrow to zero according to the original sample or with a caliber in the form of a tapered sleeve;

- Check the clearance in the plunger pair on a pressure test bench with a falling weight. Rinse the vapor parts thoroughly in filtered diesel fuel before testing.

Install the plunger pair into the socket of the stand, the plunger - in the position of maximum feed. Fill the space above the plunger with filtered diesel fuel. Install the sealing plate on the end of the bushing, tightening it with the screw, then release the weight latch.

Under its action, fuel will gradually be squeezed out through the gap in the steam - the larger the gap, the faster. The value of the load on the plunger must correspond to the value of the fuel pressure 19.1-20.1 MPa (195-205 kgf / cm2).

Full lifting of the plunger to the moment of cut-off under the action of the load, accompanied by the squeezing of the fuel through the gap between the sleeve and the plunger, must take at least 20 s.

Install the plunger pair with a plunger lifting time until the cut-off of more than 40 s, moistened with filtered diesel fuel, in a vertical position on the end of the sleeve, after placing a sheet of clean paper.

After a five-minute hold while lifting the pair by the plunger shank, the sleeve should be lowered from the plunger under the action of its own weight;

- the plunger pusher is installed in the bore of the pump casing with a clearance of 0.025-0.075 mm. The maximum allowable clearance during operation is 0.2 mm. Measure the outer diameter of the plunger pusher with a micrometer or a bracket;

- in the assembly unit, the pusher roller - the roller sleeve - the roller axis, the main defect is the wear of the mating surfaces. The total gap in the mate is 0.022-0.087 mm, the maximum allowable is 0.3 mm (measure with an indicator head).

If the wear exceeds the specified limit, disassemble and repair the pusher, while taking measurements separately. The maximum allowable clearance in the case of surface wear in the connection between the roller axis and the roller sleeve is 0.12 mm, in the connection between the roller sleeve and the pusher roller 0.18 mm. Measure the outer surfaces of the parts with a micrometer, and the inner surfaces with an inside gauge with an indicator.

- on the surface of the camshaft, metal chipping, scuffing, thread stripping, traces of corrosion are not allowed. The maximum permissible height of the cam profile is not less than 47.7 mm (the height of the cam profile according to KD is 47.95-48.05 mm).

Measure with a bracket 47.7; the diameter of the journals for the inner rings of the bearings must be at least 30.0 mm (according to КД 30.002-30.011 mm), the tightness along the sealing edge of the cuff must be at least 0.5 mm;

- no cracks, dents or traces of corrosion are allowed on the surface of the discharge valve. Valve wear is manifested in the loss of tightness along the sealing cone, in the seizing of the valve in the seat.

Use a 10x magnifying glass to detect defects. In case of loss of tightness, rub the seat and valve together along the cone with GOST 3647-71 paste, if the valve gets stuck in the seat, flush the parts with gasoline or diesel fuel. If the jam persists, replace the pair;

- the maximum allowable clearance in the mating of the pin of the rack lever - the rack groove of 0.18 mm (according to CD 0.025-0.077 mm), the maximum allowable clearance in the mating axis of the leash of the swivel sleeve - the groove of the fuel pump rack 0.3 mm (according to CD 0.117-0.077 mm). Use a bore gauge to measure the grooves.

When repairing the speed controller of the injection pump Kamaz-740:

- replace the top and back covers of the regulator if there are cracks on them. If the oil strainer in the rear cover of the regulator is clogged, blow it out with compressed air.

If the filter is defective, replace it. The operating oil consumption through the filter must be at least 1.6 l / h at a pressure of 98.1-294 kPa (1-3 kgf / cm2);

- to determine the suitability for further operation, inspect and measure the holder of the regulator weights assembled with weights without disassembly, since when pressing out the parts may be damaged and the pairing of weights, which are selected with a difference in static moment of no more than 196 kPa (2 kgf / cm2), may be disturbed.

Partial or complete disassembly of the assembly unit should be carried out only in case of wear exceeding the allowable value, or destruction of parts.

The gap between the lever of the regulator spring and the axis of the lever, pressed into the pump housing, should not exceed 0.3 mm

When repairing a low-pressure pump and a prestarting fuel pump for the injection pump Kamaz-740:

- replace the low pressure pump and the prestarting fuel pump if there are cracks on the body, fractures, mechanical damage, corrosion leading to a loss of mobility of the mating parts;

- when disassembling and assembling a low pressure pump, remember that the piston and pump housing are a precisely matched pair and cannot be dismantled.

The pump is disassembled and repaired only if it does not provide the required characteristics;

- pay special attention to the condition of the assembly unit rod - bushing of the low pressure pump, since the amount of fuel flowing into the camshaft cavity depends on the amount of wear in the coupling.

The gap in the specified mate should not exceed 0.012 mm.Check the gap size, without removing the bushings from the pump casing, by determining the air pressure drop time from 490 kPa (5 kgf / cm2) to 392 kPa (4 kgf / cm2) in a 30 cm3 accumulator.

Pump flow at a camshaft rotational speed of 1100-1300 min-1, a vacuum at the inlet nozzle of 23 kPa (173 mm Hg) and back pressure:

- 80-100 kPa (0.8-1.0 kgf / cm2) must be at least 3 l / min for engines mod. 740.11-240 and mod. 740.13-260;

- 125 kPa (1.25 kgf / cm2) must be at least 3.5 l / min for the 740.14-300 engine.

With the outlet valve completely closed and the camshaft rotational speed of 1100-1300 min-1, the pump must create a pressure of at least:

- 400 kPa (4 kgf / cm2) - for engines of models 740.11-240 and 740.13-260;

- 600 kPa (6 kgf / cm ") - for the 740.14-300 engine.

With the inlet valve completely closed and the camshaft speed indicated, the minimum vacuum generated by the pump should be:

- 52 kPa (390 mm Hg) - for engines of models 740.11-240 and 740.13-260;

- 70 kPa (525 mm Hg) - for the 740.14-300 engine;

For disassembly of the injection pump coupling Kamaz-740:

-Unscrew the screws from the case and drain the oil:

- clamp the support 6 (Fig. Disassembling the coupling) of the device into a table vise and install the coupling on it, screw the stud 5 into the support, install the washer 3 and tighten with the nut 2;

- using the key 1, unscrew the housing 5 (see Fig. Automatic clutch for fuel injection advance);

- remove the leading half-coupling 1 with spacers 12, weights 11, springs 8;

-press cuffs 4 and 2.

Considering that the weights are picked up according to the static moment, save their pairing for later installation.

Dismantling of the injection pump coupling Kamaz-740

1 key; 2 - nut; 3 - washer; 4 - clutch; 5 - hairpin; 6 - stand.

To assemble the injection pump coupling Kamaz-740:

- press the cuff 4 into the hole of the driving half of the coupling;

-install the driving half-coupling with a mandrel on the driven hub;

- install in glasses 7 adjusting shims 6 and springs 8, glasses with springs - in the guide holes of the weights, in which they should move freely without jamming.

In an arbitrary position of the coupling parts, the gap between the profile surface and the spacer should be no more than 0.15 mm. With the loads brought together to the stop by turning the driving half of the coupling, one of the gaps should be no more than 0.1 mm, the other equal to zero.

Adjust the clearances by selecting the spacers:

- press the collar 2 into the coupling housing flush with the inner end surface;

- install the rubber sealing ring 14 into the groove of the driven half of the coupling; ...

- screw the housing onto the driven coupling half and tighten with a torque of 314-343 Nm (32-35 kgcm);

- to stamp the driven half-coupling in three places.

Before installing the body, ensure equal clearances between the body and the spring cups with the weights brought together to the stop. The gap difference should be no more than 0.2 mm.

After assembly, fill the clutch with the engine oil used for the engine.

To disassemble the fuel injection pump nozzle Kamaz-740, use the I801.20.000 tool. Clamp the bed 2 (Fig. Disassembling the nozzle.) Of the device in a vise, set the nozzle into the groove of the bed with the spray gun up.

Screwing in the bolt 4, press the nozzle atomizer with the stop 1, then unscrew the atomizer nut with an open-end wrench. After unscrewing bolt 4, remove the nozzle from the device and disassemble it into parts.

Dismantling of the injection pump nozzle Kamaz-740

1 - emphasis; 2 - bed; 3 - nozzle; 4 - bolt.

Remember that the body and the needle of the atomizer are matched in pairs and cannot be dismantled. The maximum allowable gap between the body and the nozzle needle is 0.006 mm.

Do not allow an increase in the stroke of the atomizer needle more than 0.4 mm, the diameter of the nozzle openings of the atomizer should not exceed 0.38 mm.

The unsatisfactory operation of the Kamaz-740 fuel injection pump nozzles is caused by a decrease in the pressure of the beginning of fuel injection, which is explained by the wear of the parts connected to the spring and the shrinkage of the spring, therefore, the height of the nozzle spacer should not be less than 8.89 mm (according to KD 8.9-9.0 mm).

If you find scratches and traces of corrosion on the spacer (use a magnifying glass with a tenfold magnification), replace the part.

Defects of the injection pump nozzle Kamaz-740 include broken spring, clogging and wear of nozzle holes, jamming of the needle and wear of its sealing part (causes leakage and poor atomization of fuel).

If necessary, carefully clean the spray nozzles with 0.25 mm steel wire.

Remove carbon deposits from the outer surface of the nozzle of the Kamaz-740 injection pump with a wooden block soaked in engine oil or a brass brush. Do not use sharp hard objects or sandpaper.

Before assembly, rinse the nozzle body of the Kamaz-740 fuel injection pump and the needle with gasoline and lubricate with filtered diesel fuel, after which the needle, extended from the body by one third of the length of the guide surface, should smoothly (without jamming) descend until the stop under the action of its own mass.

When assembling the injection pump nozzle Kamaz-740, tighten the spray nut by squeezing out the spray.

DISASSEMBLY OF THE FUEL FUEL SECTION OF THE KAMAZ-740 ENGINE

Labor intensity - 14.0 people. min.

28. Install section 1 (Fig. 5) in a vice, unscrew the high-pressure union 9, remove the spring stop 8 with the spring 5, remove the adjusting washers 6, 7, remove the discharge valve 4 with a sealing gasket 2, the discharge valve body 3. (Workbench , spanner 19 mm).

29. Remove the plate 21 of the pusher spring, spring 20, washer 19, remove the plunger pair 17, remove the O-rings 12 from the body of the plunger pair, remove the rotary sleeve 10 of the plunger.

REAR REGULATOR COVER DISASSEMBLY

30. Unscrew the screwdriver plug, screwdriver 8, remove the gasket 10 (Fig. 1), filter 9. (Wrench 14 mm, 17 mm).

31. Unscrew the threaded plug 3, remove the gasket 4. (Replaceable head 10 mm).

32. Unscrew the fuel priming pump fastening pins, press out the transport plug. (Hairpin, hammer).

DISASSEMBLY OF THE REGULATOR COVER WITH ENGINE LEVERS KAMAZ-740

33. Unscrew bolts 10 (Fig. 6) with spring 9 and flat washers 8 fastening the regulator control lever and stop lever, remove the levers 7 and shaft 13 of the control lever, O-ring 6, press out the control lever bush 5, the feed stop lever 14 and the return spring 1. (Wrench 10 mm, mandrel d = 10 mm L = 60 mm).

34. Unscrew the nuts 11 of the adjusting bolts 12 by 1-2 turns, unscrew the adjusting bolts 12, unscrew the nuts from them, unscrew the oil filler plug 4 and remove the plug gasket 3. (Spanner 10 mm, 17 mm).

DISASSEMBLY OF THE FUEL SUPPLY PUMP OF THE KAMAZ-740 ENGINE

Labor intensity - 11.0 people. min.

35. Install the fuel priming pump in a vice. (Locksmith workbench).

36. Unscrew the transport plugs. (Wrench 17 mm).

37. Unscrew the plug 21 of the spring, remove the gasket 20, the spring 19 of the piston, the piston 18 of the fuel pump. (Spanner 22 mm).

38. Unscrew the valve body 40, remove the gasket 39, the valve spring 38, the adjusting washer, the valve seat 36 and the valve 37.

39. Unscrew the bolt 30 securing the cylinder body, remove the valve 33, spring 32, washers 31, cylinder 23 of the hand pump assembly. (Wrench 19 mm).

40. Unscrew the cylinder body 29 from the cylinder 23, remove the pump piston gasket 28, the hand pump piston 26, the hand pump handle 22 assembled with the rod 24 and remove the O-ring 27 from the piston 26. (Bit).

41. Remove the bushing 17 of the rod, the rod 16 of the pusher.

42. Install the pusher 6 of the pump in a vice, press out the axle 5 of the roller from the pusher, remove the roller 4. (Workbench, hammer, mandrel D = 4 mm L = 50 mm).

Rice. 6. Speed ​​governor cover:
I - spring; 2 - top cover; 3 - gasket; 4 - plug; 5 - bushing; 6 - sealing ring; 7 - regulator control lever; 8 - washer; 9 - spring washer; 10 - bolt;
II - nut; 12 - bolt; 13 - shaft; 14 - lever for turning off the feed

WASHING OF FUEL PUMP PARTS OF KAMAZ-740 ENGINE

Place the parts of the high-pressure fuel pump in the washing installation and rinse in MS-8 washing solution TU 6-15-978-76. After washing, blow out the washed parts with compressed air. (Washing unit, air gun)

DEFECTIVE PARTS OF THE FUEL PUMP OF THE KAMAZ-740 ENGINE

Defect the parts of the high pressure fuel pump in accordance with the defect card No. 2.2. and replace worn parts with new ones.

ASSEMBLY OF THE FUEL SUPPLY PUMP OF THE KAMAZ-740 ENGINE

Labor intensity - 15.0 people. min.

43. Install the roller 4 of the pusher into the pusher 6, press in the axle 5 of the roller. (Locksmith workbench, hammer).

* 44. Install the pusher rod 16 into the rod bushing 17, install the rod with the bushing into the pusher 6.45.Install the handle 22 of the hand pump assembly with the rod 24 into the cylinder 23, install the O-ring 27 into the groove on the piston 26, install the piston 26, install the piston gasket 28 into the cylinder body 23, screw the cylinder 23 into the cylinder body 29. Sealing

the ring should lie evenly in the groove, without twisting.

46. ​​Install washer 37, pump, washer 31 on the bolt 30 of the hand pump, in bolt 30 - spring 32, valve 33, valve seat 34 and screw the bolt into the pump housing 35. Before installing the gasket 31, it is necessary to warm up to a crimson color and cool. (Wrench 19 mm, electric furnace, grip).

47. Install valve seat 36, valve 37, adjusting washer, valve spring 38, gasket 39 into the body 35 of the feed pump, screw the valve body 40. Before installing the gasket 39, it must be heated to a crimson color and cooled. (Electric oven, capture).

48. Install the piston 18 of the fuel pump, the spring 19 of the piston, the gasket 20 into the housing 35 of the fuel pump and screw the plug 21 of the spring. (Spanner 22 mm).

49. Close the transport plugs. (Wrench 17 mm).

Rice. 7. Low pressure fuel pump (TNVD):
1 - nut; 2 - lock washer; 3 - eccentric; 4 - pusher roller; 5 - roller axis; 6 - pusher; 7 - locking screw; 8 - screw stopper; 9 - gasket; 10 - body hairpin; 11 - pusher spring; 12 - spring washer; 13 - nut; 14 - gasket; 15 - high pressure fuel pump assembly; 16 - pusher rod; 17 - bushing; 18 - piston; 19 - piston spring; 20 - gasket; 21 - spring stopper; 22 - handle with a plate; 23 - cylinder; 24 - stock; 25 - pin; 26 - piston; 27 - sealing ring; 28 - gasket; 29 - cylinder body; 30 - body bolt assembly; 31 - gasket; 32 - spring; 33 - valve; 34 - valve seat; 35 - pump casing; 36 - valve seat; 37 - valve; 38 - valve spring; 39 - gasket; 40 - valve body

ASSEMBLING THE REGULATOR COVER WITH LEVERS

50. Screw in the oil filler plug 4 (Fig. 6), screw the nuts 11 of the adjusting bolts onto the adjusting bolts 12, screw the bolts 12 into the lugs of the cover 2. (Wrench 10 mm).

51. Install O-rings 6, press in the bushings 5 ​​of the levers for shutting off the feed and control, install the return spring 1 on the shaft 14 of the fuel shut-off lever, insert it into the cover 2, install the shaft 13 of the control lever in the cover, install the levers 7 and tighten the bolts 10 s spring 9 and flat 8 washers.

REAR REGULATOR COVER ASSEMBLY

Labor intensity - 11.0 people. min.
52. Press in the transport plug, screw in the fuel supply pump mounting studs. (Hairpin).

53. Install the gasket 4 (Fig. 2) and screw the threaded plug 3. (The head is replaceable by 10 mm).

54. Install filter 8, gasket 10, screw in the screw cap, screw 8. (Wrench 14 mm, 17 mm).

In this article we will talk about a KAMAZ truck and, in particular, about a high-pressure fuel pump. This unit is an important element in the system of any diesel engine. In the event of a fuel pump malfunction, the engine simply stops its work, so the owner or mechanic who serves KAMAZ needs to know the device, its principle of operation and actions to adjust the fuel pump.

The manufacturing plant equips KAMAZ vehicles with diesel engines that meet the standards Euro-2... In practice, during operation, such motors have shown themselves in the best light, primarily due to the reliability of the unit. Injection pump... Here is a diagram that describes the device of the fuel pump and the designation of its parts.

The principle of operation lies in the fact that diesel fuel is suitable from the fuel tank, which is filtered through a fine filter. The fuel priming pump provides supply pressure and directs the flammable liquid directly into the Injection pump... Following the strokes of the piston group, the diesel fuel is distributed through the pipes to the injectors. The latter, in turn, spray the combustible mixture in the combustion chamber.