Fix the regulator in a vice with soft jaws on the boss of outlet 1 of housing 5.

It is forbidden to mount the regulator by the upper and lower parts of the body 5, as this may lead to its deformation or destruction.

Pneumatic pressure regulator

Unscrew the lock nut 7 and unscrew the adjusting screw 8, loosening the spring 6 of the balancing piston.

Next, unscrew with a special socket wrench 50 mm mod. and 806.04.006 top cover 15 and remove spring b and balancing piston 9 together with inlet 11 and outlet 4 valves, remove sealing collar 20.

Unscrew bottom cover 1 with silencer. To remove the silencer, unscrew it from the bottom cover and remove the filter 3 with the spring and the unloading piston 12 as an assembly.

To disassemble the relief piston 12, you need to remove two thrust rings 18 and 19 with round-nose pliers.

To disassemble the check valve 10, unscrew the washer 22 with round-nose pliers and remove the check valve with spring 21.

After disassembling the regulator parts, wash with clean gasoline or acetone, dry and carefully inspect.

On the surface of body parts, cracks, hairlines and other defects visible to the eye are not allowed. Parts must be cleaned of rust and burnt.

All rubber parts must be replaced with new ones.

The order of assembly of the regulator is reverse to disassembly. The threads on the lower 1 and upper 15 covers must be lubricated with graphite grease during assembly.

Test bench for checking the performance of brake drive devices

Adjusting and checking the pressure regulator after assembly. Install the pressure regulator on the test bench (see fig. 2) and connect the device according to the diagram shown in fig. 1), a.

Then supply and release air at a pressure of 1.4 MPa three times into port I. In this case, output V must be plugged

If the limits of the regulated air pressure in outlet II do not correspond to 0.65 ... 0.8 MPa, adjust the pressure to the required limits using the adjusting bolt 8.

In this case, one should strive to achieve the upper pressure limits, since due to the shrinkage of the springs during operation, a decrease in the set pressure is possible.

After adjusting, check the on and off pressure of the regulator three times, and then lock the adjusting bolt.

By installing shims of different thicknesses under the unloader valve spring, it is necessary to adjust the actuation pressure of unloader valve 2. To do this, block the air passage to terminals I and II with a plug.

Increase the pressure in outlet I three times, and when the pressure reaches 1.0…135 MPa, the safety valve should open and the air should escape through outlet III of the regulator.

After adjustment, release the passage to terminal II

To check the regulator for tightness, it is necessary to set a pressure of 0.05 MPa in terminals I and II, while checking the tightness of the inlet valve

II, piston collar 9 and unloading valve 2. The tightness of the check valve 10 is checked when a pressure of 0.45 MPa is set in port II.

When washing, the appearance of air bubbles is not allowed for 1 minute.