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Brake system repair prices
Name of service PriceReplacement of brake pads (drum system price per axle without repair of expansion shafts) 2350-7000 RUB Removal and installation of caliper (disc brakes) 2100 RUB Reassembly of caliper (replacement of guides) 2000 RUB Reassembly of caliper (replacement of self-lead mechanism) 3500 RUB Removal and installation of brake disc 1600 RUB Removal and installation of expansion shaft 1062 RUB installing the expansion shaft (with restoration of landing journals) 3200 RUR Removing and installing brake pads (drum system) (price per wheel) 1600 RUR Removing and installing a brake drum 480 RUR Replacing the brake lever 700 RUR Riveting brake pads 1 pair 800 RURPayment via PayPal
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Maintenance of the brake system Kamaz-5320
During daily maintenance, we drain the condensate from the system receivers after a trip.
Condensate should be drained from the receivers at the nominal air pressure in the system, moving the drain cock rod to the side
Pull the rod down. If the condensate has a high oil content, this indicates a compressor malfunction.
When condensate freezes in the receivers, you need to warm it up with hot water or warm air.
Check the condition of the trailer hoses.
With maintenance – 1:
— inspect all elements of the brake system;
— adjust the stroke of the brake chamber rods.
The stroke of the brake chamber rods is adjusted when the brake drums are cold and the parking brake is off.
The stroke of the rods must be adjusted if it is more than 40 mm.
We measure the stroke of the rod with a ruler, placing it parallel to the rod, resting its end against the brake chamber body.
We mark the location of the extreme point on the ruler scale.
After this, press the brake pedal all the way, the air pressure should be at least (6.2 kgf/cm2), the parking brake system is turned off, and again mark the location of the same point on the rod on the scale.
The difference between the obtained values will be the stroke of the rod.
We adjust the stroke of the rod by turning axis 1 (Figure 1) of the worm of the adjusting lever, having first unscrewed the lock 4 two turns. By rotating the axis, we set the minimum stroke of the rod.
We make sure that the wheel rotates freely, without any jamming, and tighten the lock.
After this, we check the gap between the pads and the brake drum through windows 2 in the shield.
After adjusting the stroke of the brake chamber rods, there may be the following gaps between the pads and the brake drum: at the expansion knuckle 0.4 mm, at the axles of the pads 0.2 mm.
It is also necessary to take into account that the difference in the stroke of the rods of the left and right wheels should have the same stroke if possible (no more than 2 or 3 mm), so that the wheels of the right and left sides brake equally;
— lubricate the expansion cam shaft bushings through a grease nipple using a syringe, making no more than 5 strokes with the syringe;
— lubricate the adjusting levers of the brake mechanisms until fresh grease is squeezed out.
- in the autumn and winter, we change the alcohol in the freezer. To do this, first drain the sediment from the housing by unscrewing the drain plug.
To fill the alcohol and control its level, lower the rod handle to the lower position and fix it by turning it 90˚ (when the rod is in the lower position, the safety is off).
Then we unscrew the plug with the level indicator, fill in 0.2 or 1 liter depending on the capacity of the fuse and close the filler hole.
To turn on the fuse, lift the handle up. To increase the effectiveness of the fuse, when filling the pneumatic system with air, you need to press the thrust handle 6 times.
With maintenance – 2:
— we check the performance of the pneumatic drive of the brake system using the valves of the control terminals;
— we check by external inspection the cotter pins of the brake chamber rods;
— tighten the nuts securing the brake chambers to the brackets and the nuts of the bolts securing the brake chamber brackets to the caliper;
— adjust the position of the brake pedal relative to the cabin floor, ensuring full travel of the brake valve lever.
Checking the performance of the pneumatic brake drive consists of determining the output parameters of the air pressure along the circuits using control pressure gauges and standard instruments in the cabin (two-pointer pressure gauge and a block of brake system warning lamps).
Carry out the check on the control valves installed in all circuits of the pneumatic drive, and the connecting heads of the “Palm” type for the supply (emergency) and control (brake) lines of the two-wire drive and type “A” connecting line of the single-wire brake drive of the trailer.
The control valves are located:
— drive circuits for the front axle service brakes — on the pressure limiting valve;
- the drive circuit of the working brake mechanisms of the rear bogie - on the right (along the vehicle) frame side member in the rear axle area;
— drive circuits for the parking and emergency brake systems — on the left frame side member in the rear axle area and in the circuit receiver;
— the drive circuit of the auxiliary brake system and consumers — in the circuit receiver.
Before checking, eliminate the leak of compressed air from the pneumatic system. As control process pressure gauges, use pressure gauges with a measurement limit of 0 - 980.7 kPa (0 - 10 kgf/cm2) of accuracy class 1.5.
We check the functionality of the pneumatic brake drive in the following order:
— fill the pneumatic system with air until pressure regulator 11 operates (see Fig. 2).
In this case, the pressure in all circuits of the brake drive and connecting head 39 of the “Palm” type of the supply line of the two-wire drive of the trailer brake mechanisms (terminal R) should be 608 - 735.5 kPa (6.2 - 7.5 kgf/cm2), and in connection head 38 type “A” of a single-wire drive (pin P) - 470.8 - 519.8 kPa (4.8 - 5.3 kgf/cm2).
The warning lights on the instrument panel should go out when the pressure in the circuits reaches 441.3 - 539.4 kPa (4.5 - 5.5 kgf/cm2). At the same time, the noise alarm (buzzer) stops working;
— Press the service brake system pedal fully. The pressure on the two-pointer pressure gauge should drop sharply by no more than 49.5 kPa (0.5 kgf/cm2).
In this case, the pressure in the control valve “B” should be equal to the reading of the upper scale of the two-pointer pressure gauge in the cockpit.
The pressure in the control valve “C” must be at least 225.6 - 264.9 kPa (2.3 - 2.7 kgf/cm2) (for an unloaded vehicle).
Lift up the vertical rod of the brake force regulator drive 30 by the amount of static deflection of the suspension.
The pressure in the brake chambers 26 should be determined using the lower scale of a two-pointer pressure gauge; the pressure in the connecting head 39 type "Palm" of the brake line of a two-wire drive (terminal R) should be 608 - 735.5 kPa (6.2 - 7.5 kgf/cm2), in the connecting head 38 type "A" of the connecting line (terminal P) the pressure should drop to 0;
— set the crane drive handle 2 to the front fixed position.
The pressure in the control valve E must be equal to the pressure in the receiver 25 of the parking and spare circuits and be in the range of 608 - 735.5 kPa (6.2 - 7.5 kgf/cm2), the pressure in the connecting head 39 of the "Palm" brake type the two-wire drive line (pin R) should be equal to 0, in the connection head 38 type “A” (pin P) 470.8 - 519.8 kPa (4.8 - 5.3 kgf/cm2);
— install the handle of the crane drive 2 of the parking brake system in a vertical fixed position.
The parking brake system warning lamp on the warning lamp unit should light up and flash.
The pressure in the valve of the control terminal E and in the connecting head 38 type “A” (terminal P) should drop to 0, and in the connecting head 39 type “Palm” of the two-wire drive brake line (terminal R) should be 608.0 - 735.5 kPa (6.2 - 7.5 kgf/cm2);
When the valve handle 2 is in a vertical fixed position, press the emergency brake release button 3.
The pressure in the control valve E must be equal to the reading of the two-pointer pressure gauge 5 in the cabin.
The brake chamber rods of the intermediate and rear axle mechanisms must return to their original position;
— release the emergency brake release button. The pressure in the control valve E should drop to 0;
— press tap 4 of the auxiliary brake system mechanism. The rods of the pneumatic cylinders 23 for controlling the dampers and the pneumatic cylinder 10 for turning off the fuel supply should extend.
The air pressure in the brake chambers of the trailer (semi-trailer) should be equal to 58.8÷68.6 kPa (0.6÷0.7 kgf/cm2).
In the process of checking the functionality of the pneumatic brake drive, when the pressure in the circuits drops to 441.3÷539.4 kPa (4.5÷5.5 kgf/cm2), the buzzer should turn on and the indicator lamps of the corresponding circuits on the instrument panel should light up.
We adjust the position of the brake pedal relative to the cabin floor.
Adjust according to the pedal installation diagram (Fig. 3) on the brake valve.
By adjusting the installation and adjustment bolts, it is necessary to ensure that the pedal platform is positioned at an angle of 35˚±2˚ and the free play of the pedal is 10-15 mm.
Secure the adjusting bolt with a lock nut, cover the adjusting bolt with sealant before adjusting.
With maintenance - 3:
— we check the condition of the brake drums, pads, linings, tension springs and expansion cams with the hubs removed: we eliminate malfunctions;
— secure the receiver brackets to the frame.
When servicing the brake mechanism, pay attention to the distance from the surface of the linings to the heads of the rivets. If this distance is less than 0.5 mm, change the brake linings.
Protect the linings from getting oil on them, since the frictional properties of oiled linings cannot be completely restored by cleaning and washing.
If you need to replace one of the left or right brake linings, replace all the linings on both brake mechanisms (left and right wheels). After installing new friction linings, treat the block.
For a new drum, the radius of the block should be 199.6÷200 mm. After boring the drum during repair, the radius of the block should be equal to the radius of the bored drum.
Drums can be bored to a diameter of no more than 406 mm.
The expansion cam shaft should rotate freely in the bracket without jamming. Otherwise, clean the supporting surfaces of the shaft and bracket, check the condition of the shaft sealing rings, and then lubricate them through a grease nipple.
The axis of the adjusting lever worm should turn freely, without jamming. Otherwise, wash the inner cavity of the lever with gasoline, dry it and fill the adjusting lever with fresh lubricant.
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Brake system repair and diagnostic services
Repair and diagnostics of the brake system of trucks
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