Checking brake booster - AR43.10-P-0325EW
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MODEL 212, 218
Shown on model 212
| Checking | |||
| Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes. | Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. | AS42.50-Z-0001-01A | |
| Brake fluid notes | AH42.50-P-0001-01A | ||
| 1 | Eliminate vacuum in BAS brake booster (A7/7) | ||
| 2 | Open engine hood | Model 218 | |
| Model 212 | AR88.40-P-1000EW | ||
| 3 | Connect vacuum tester (030) with test connection (031) to BAS brake booster (A7/7) | AR43.10-P-0024-01V | |
| Pneumatic brake booster test specifications | *BE43.10-P-1001-01F | ||
| Pneumatic brake booster test specifications | *BE43.10-P-1002-01F | ||
| Figure | |||
| Figure | |||
| 4 | Connect pressure tester (051) with connection fitting to brake caliper | ||
| *BA42.10-P-1003-10J | |||
| 5 | Connect pedal force measuring instrument (060) at brake pedal | ||
| 6 | Start engine and by opening the throttle produce a vacuum of 0.75 to 0.8 bar | ||
| Check non-return valve. | AR43.10-P-0023EW | ||
| Remove/install master brake cylinder, replace seal. | AR42.10-P-0300EW | ||
| 7 | Apply the specified force to the brake pedal and read off the line pressure on the pressure tester (051) | ||
| Brake pipe line pressure | *BE43.10-P-1003-01F | ||
| 8 | Detach vacuum tester (030) with test connection (031) from BAS brake booster (A7/7) | ||
| 9 | Detach pressure tester (051) with connection fitting from brake caliper | ||
| 10 | Remove pedal force meter (060) | ||
| 11 | Bleed brake system | AR42.10-P-0010EW | |
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 12 | Check brake system for leaks | AR42.10-P-0100-01V |
PNEUMATIC BRAKE BOOSTER TEST SPECIFICATIONS
| Number | Designation | Model 212 | Model 218 | ||||
|---|---|---|---|---|---|---|---|
| BE43.10-P-1001-01F | Brake booster dia. | - | mm | 203/229 | 203/229 | ||
| - | inches | 8/9 | 8/9 | ||||
| BE43.10-P-1002-01F | Boost factor | ≈7 | ≈7 | ||||
| BE43.10-P-1003-01F | Brake pipeline pressure | Intake manifold vacuum 0.75...0.8 bar | Force on brake pedal | 50 N | bar | 17.7...24.7 | 17.7...24.7 |
| 100 N | bar | - | - | ||||
| 150n | bar | 62...78 | 62...78 | ||||
| 200n | bar | 83...102 | 83...102 | ||||
| 250n | bar | 105...122 | 105...122 | ||||
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 212 except model 212.074/077/274/277 | Model 212.074/077/274/277 without code B07 | |
|---|---|---|---|---|
| BA42.10-P-1003-10J | Bleed screw to brake caliper | Nm | 14 | 14 |
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 212.074/077/274/277 with code B07 | Model 218 except model 218.374 | |
|---|---|---|---|---|
| BA42.10-P-1003-10J | Bleed screw to brake caliper | Nm | 14 | 14 |
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 218.374 without code B07 | Model 218.374 with code B07 | |
|---|---|---|---|---|
| BA42.10-P-1003-10J | Bleed screw to brake caliper | Nm | 14 | 14 |