Worksheets
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| Model Of The Machine | Date | ||
| Serial Number | Service Meter Hours |
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| Visual Inspection | |||
| Hose Connections | Component Damage | ||
| Air Leaks | Oil Leaks | ||
| Acceptable Amount Of Flow Into The Makeup Tank For The Brakes | |||
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| Test | Specifications | Actual Value |
| Cutout Pressure Of The Air Compressor Governor | 830 ± 35 kPa (120 ± 5 psi) |
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| Cut-in Pressure Of The Air Compressor Governor | 655 kPa (95 psi) |
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| Cut-in Pressure Of The Air System Pressure Protection Valve | 550 kPa (80 psi) |
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| Cutout Pressure Of The Air System Pressure Protection Valve | 485 kPa (70 psi) |
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| Cut-in Pressure for the Pressure Protection Valve of the Brake Air System | 380 kPa (55 psi) |
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| Cutout Pressure for the Pressure Protection Valve of The Brake Air System | 310 kPa (45 psi) |
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| Delivery Pressure Of The Retarder Air Control Valve In The Full ON Position | 550 kPa (80 psi) |
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| Maximum Delivery Pressure Of The Parking And Secondary Brake Control Valve At High Idle | 4890 kPa (710 psi) |
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| Minimum Delivery Pressure Of The Parking And Secondary Brake Control Valve At Low Idle | 4481 kPa (650 psi) |
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| Temperature Of The Brake Cooling Oil (1) | 79° to 93°C (175° to 200°F) |
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| Minimum Pressure Of The Brake Cooling Oil At Low Idle | 14 kPa (2 psi) |
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| Maximum Pressure Of The Brake Cooling Oil At High Idle | 172 kPa (25 psi) |
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| Relief Pressure Of The Electric Powered Parking Brake Release Pump | 4481 kPa (650 psi) |
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| ( 1 ) | Do not allow the oil to exceed 124°C (255°F). |
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| Brake Holding Ability Test (1) | |||
| Engaged Brake | Engine Speed (rpm) | Engaged Brake | Engine Speed (rpm) |
| Service Brake | Parking Brake | ||
| Manual Retarder | Secondary Brake | ||
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| ( 1 ) | The engine speed should reach a minimum of 1200 rpm before there is any machine movement. |
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| Brake Master Cylinders | ||
| Brake Master Cylinder | Air Pressure | Oil Pressure (1) |
| Front Brake Master Cylinder | ||
| Front Brake Master Cylinder | ||
| Rear Brake Master Cylinder | ||
| Rear Brake Master Cylinder | ||
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| ( 1 ) | The pressure of the oil should be 6.6 times the pressure of the air. |
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| Slack Adjusters (1) | ||
| Slack Adjuster | Pressure At The Slack Adjuster (2) | Pressure At The Wheel (3) |
| Front Slack Adjuster Left Front Wheel |
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| Front Slack Adjuster Right Front Wheel |
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| Rear Slack Adjuster Left Rear Wheel |
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| Rear Slack Adjuster Right Rear Wheel |
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| ( 1 ) | The pressures should be approximately the same value. |
| ( 2 ) | Use the pressure tap on the slack adjuster. |
| ( 3 ) | Measure this pressure at the port that is labelled. "S" |
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| Leakage In The Parking And Secondary Brake | |||
| Decrease In Pressure In The First Minute | |||
| Plugged Wheel | Pressure Decrease | Plugged Wheel | Pressure Decrease |
| No Plugged Wheels | ------- | ------- | |
| Left Rear | Left Front | ||
| Right Rear | Right Front | ||
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| Brake Wear | ||||
| Piston Travel | Front Brake | Front Brake Percent of Wear |
Back Brake | Rear Brake Percent of Wear |
| New | ||||
| Rebuild 1 | ||||
| Rebuild 2 | ||||
| Rebuild 3 | ||||
| Rebuild 4 | ||||
| Rebuild 5 | ||||
| Rebuild 6 | ||||
| Rebuild 7 | ||||
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