BUS FLEET PREDICTIVE MAINTENANCE AUDIT CHECKLIST - PUBLIC TRANSIT

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--- ENGINE & POWERTRAIN ---
[ ] Engine Hours
[ ] Oil Level (in liters)
[ ] Coolant Temperature (Celsius)
[ ] Engine Noise Level (Normal, Slightly Elevated, Elevated, Abnormal)
[ ] Exhaust Smoke Color (Clear, Light Gray, Dark Gray, Black, Blue)
[ ] Any unusual engine behavior observed?
[ ] Last Oil Change Date
[ ] Engine RPM at idle

--- BRAKING SYSTEM ---
[ ] Brake Pad Thickness (mm)
[ ] Brake Rotor Thickness (mm)
[ ] ABS System Status (Functional, Faulty, Degraded)
[ ] Brake Fluid Condition (Good, Cloudy, Contaminated)
[ ] Brake Line Pressure (PSI)
[ ] Any unusual noises during braking?

--- SUSPENSION & STEERING ---
[ ] Front Left Suspension Height (mm)
[ ] Front Right Suspension Height (mm)
[ ] Rear Left Suspension Height (mm)
[ ] Rear Right Suspension Height (mm)
[ ] Steering Play (mm) (None, Slight, Moderate, Excessive)
[ ] Shock Absorber Condition (Good, Fair, Poor)
[ ] Notes on Steering Feel & Handling
[ ] Last Alignment Date

--- TIRES & WHEELS ---
[ ] Tire Pressure (PSI) - Front Left
[ ] Tire Pressure (PSI) - Front Right
[ ] Tire Pressure (PSI) - Rear Left
[ ] Tire Pressure (PSI) - Rear Right
[ ] Tire Tread Depth (mm) - Front Left
[ ] Tire Tread Depth (mm) - Front Right
[ ] Tire Tread Depth (mm) - Rear Left
[ ] Tire Tread Depth (mm) - Rear Right
[ ] Wheel Condition (Good, Minor Damage, Significant Damage)

--- ELECTRICAL SYSTEM ---
[ ] Battery Voltage (V)
[ ] Alternator Output (A)
[ ] Wiring Harness Resistance (Ohms)
[ ] Wiring Harness Condition (Excellent, Good, Fair, Poor)
[ ] Wiring Diagram Image (if applicable)
[ ] Notes on Electrical System Inspection

--- HVAC SYSTEM ---
[ ] Refrigerant Pressure (High Side)
[ ] Refrigerant Pressure (Low Side)
[ ] Ambient Temperature (Interior)
[ ] Supply Air Temperature
[ ] Compressor Noise Level (Normal, Slightly Elevated, Elevated, Abnormal)
[ ] Blower Motor Speed (Low, Medium, High)
[ ] Additional Comments/Observations

--- DIAGNOSTIC DATA REVIEW ---
[ ] Engine RPM at Idle
[ ] Transmission Temperature (°C)
[ ] Coolant Temperature (°C)
[ ] Brake Pressure (PSI)
[ ] Fault Code Presence (Yes/No) (Yes, No)
[ ] Description of any identified fault codes
[ ] Date of Diagnostic Data Retrieval
[ ] Time of Diagnostic Data Retrieval

--- FLUID LEVELS & CONDITION ---
[ ] Engine Oil Level (cm)
[ ] Engine Oil Temperature (Celsius)
[ ] Engine Oil Condition (Excellent, Good, Fair, Poor)
[ ] Coolant Level (cm)
[ ] Coolant Condition (Clear, Slightly Cloudy, Cloudy, Contaminated)
[ ] Brake Fluid Level (cm)
[ ] Power Steering Fluid Level (cm)

--- ONBOARD SENSORS & TELEMATICS ---
[ ] GPS Signal Strength (dB)
[ ] Engine RPM Sensor Accuracy (%)
[ ] Accelerometer Calibration Drift (m/s²)
[ ] CAN Bus Communication Status (Normal, Warning, Error)
[ ] OBD-II Data Transmission Status (Active, Inactive, Partial)
[ ] Last Telematics Data Sync Date
[ ] Last Telematics Data Sync Time

--- PREVENTATIVE MAINTENANCE RECORDS ---
[ ] Last Maintenance Date
[ ] Mileage at Last Maintenance
[ ] Maintenance Performed (Select all that apply) (Oil Change, Filter Replacement, Brake Inspection, Fluid Top-off, Tire Rotation, Other)
[ ] Technician Notes/Observations
[ ] Attach Supporting Documents (e.g., Invoice)
[ ] Condition of Parts Removed (Excellent, Good, Fair, Poor)
[ ] Next Scheduled Maintenance Date

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