Class B_Module 2_Vehicle Systems & Pre-trip 5_10_21.pdf

EMERGENCY VEHICLE OPERATOR CLASS “B” Module 2 Major Vehicle Systems Pre-trip Inspections Revised 5/10/21 OLICK C TO EDIT MASTER TITLE STYLE BJECTIVES Identify the major vehicle systems and their component parts Determine methods and requiremen...

EMERGENCY VEHICLE OPERATOR CLASS “B” Module 2 Major Vehicle Systems Pre-trip Inspections Revised 5/10/21 OLICK C TO EDIT MASTER TITLE STYLE BJECTIVES Identify the major vehicle systems and their component parts Determine methods and requirements for pre-trip inspection of vehicle systems Define maintenance requirements for vehicle systems Review MCFRS out-of-service criteria for fire department apparatus Review defect reporting and resources for apparatus operators Rev. 1/8/2020 EVOC-Class B Module 2 M OTIVATION CLICK TO EDIT MASTER TITLE STYLE WHY KNOW THE COMPONENTS? Correctly identify defects and write accurate defect reports Determine and differentiate between normal, monitoring, and out of service conditions Identify critical safety issues before they cause injury or damage Ability to communicate with mechanics when describing conditions – “speaking their language” Make educated decisions about the vehicle you are driving! Rev. 1/8/2020 EVOC-Class B Module 2 DLICK C TO EDIT MASTER TITLE STYLE EFINITIONS Leakage oClass 1: seepage of fluid; not enough to form drops oClass 2: leakage great enough to form drops; drops do not drip oClass 3: leakage great enough for drops to drip Operational Test: A test to determine the operational readiness of a component on a fire apparatus by observing the actual operation of the component. Rev. 1/8/2020 EVOC-Class B Module 2 F IVE M CLICK EDITSM AJOR TO YSTEMS ASTER TITLE STYLE There are five primary vehicle systems that impact your ability to safely control the apparatus: Steering 1. Tires 2. Wheels 3. Steering Tires and Wheels 4. Suspension 5. Brakes Brakes Suspension Rev. 1/8/2020 EVOC-Class B Module 2 TLICK C IRESTO EDIT MASTER TITLE STYLE tread Key to all vehicle movement shoulder oSteering oBraking oAccelerating inner plies CID (cords) sidewall oCondition oInflation oDepth bead Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE C: CONDITION No cuts that expose cord CID No bulges on sidewall which indicates cord separation Front tires are not re-grooved or recapped Front tires are not mismatched Rev. 1/8/2020 EVOC-Class B Module 2  TIRES CLICK TO EDIT MASTER TITLE STYLE I: INFLATION Improper inflation…. ✓ Increases stress on the tire ✓ Reduces performance in emergency handling ✓ Increases wear ✓ Increases resistance to rolling and creates heat Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE I: INFLATION Any tires obviously flat? CID Listen and look for leaks Look for abnormal bulging oDual wheels should not be touching each other o4 lugs touching the ground Measure the tire pressure oVerify against pressures provided by the manufacturer oOn the data plate in the cab or on a door frame Ensure valve stems are capped and not touching the wheel Automated pressure monitoring systems are not in use in MCFR Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE D: DEPTH Insufficient tread depth…. Increases stopping distance Reduces steering performance Fails to channel rain and snow from beneath the tread ohydroplaning Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE D: DEPTH DOT minimum tread depths oSteering axles: 4/32 inch CID oOther axles: 2/32 inch No pieces of tread missing exposing cords Tread should be worn evenly Tread depth will be obtained from any major groove oCheck multiple areas around the tire oCheck in different grooves oCheck the deepest portion of the groove and not on top of a tie bar or hump Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE D: DEPTH Steering Axles—4/32” Non-Steering Axles—2/32” When a Quarter is inserted When a Penny is inserted into the grooves of the into the grooves of the tread tread the top of George the top of Abraham Lincoln’s Washington’s head should head should be below the be below the tread surface. tread surface. The tread The tread depicted in the depicted in the photo has photo has just enough just enough tread depth. tread depth. Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE OTHER CONSIDERATIONS Steering tires oDo the tread patterns match from side to side? oAre they the same size and type? Non-steering tires - duals oEach pair of tires is designed to carry a load together oDamage, incorrect inflation, or uneven wear transfers more load to one tire oBest practice is to mount only the same brand of tire with the same tread pattern and depth (within 4/32) in a dual assembly DOT does not mandate tire specifications Rev. 1/8/2020 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE OTHER CONSIDERATIONS Does the tire capacity match the axle weight ? Does the tire’s maximum air pressure match the wheel’s maximum air pressure ? Does the wheels maximum weight match the axle weight ? Rev. 4/28/2021 EVOC-Class B Module 2 TIRES CLICK TO EDIT MASTER TITLE STYLE OOS CRITERIA Steering tires with