ODT 1050 - Preventative Maintenance

Identify and practice general shop safety rules and procedures. 

Utilize safe procedures for handling of tools and equipment. 

Identify and use proper placement of floor jacks and jackstands. 

Identify and use proper procedures for safe lift operation. 

Utilize proper ventilation procedures for working within the lab/shop area.

Identify marked safety areas. o Identify the location and the types of fire extinguishers and other fire safety equipment. 

Demonstrate knowledge of the procedures for using fire extinguishers and other fire safety equipment. 

Identify the location and use of eye wash stations. o Identify the location of the posted evacuation routes. 

Comply with the required use of safety glasses, ear protection, gloves, and shoes during lab/shop activities. 

Identify and wear appropriate clothing for lab/shop activities. o Secure hair and removing jewelry for lab/shop activities. 

Demonstrate awareness of the safety aspects of supplemental restraint systems (SRS), electronic brake control systems, and hybrid vehicle high voltage circuits. 

Demonstrate awareness of the safety aspects of high voltage circuits (such as high intensity discharge (HID) lamps, ignition systems, injection systems.). 

Locate and demonstrate knowledge of material safety data sheets (MSDS).

Tools and Equipment

Identify tools and their usage in equipment applications. 

Identify standard and metric designation. 

Demonstrate safe handling and use of appropriate tools. 

Demonstrate proper cleaning, storage, and maintenance of tools and equipment. 

Demonstrate proper use of precision measuring tools 

Examples: micrometer, dial-indicator, dial-caliper

Diesel Engine

Check engine starting/operation (including unusual noises, vibrations, exhaust smoke, etc.); record idle and governed rpm. 

Inspect vibration damper. 

Inspect belts, tensioners, and pulleys; check and adjust belt tension; check belt alignment. 

Check engine oil level and condition; check dipstick seal. 

Inspect engine mounts for looseness and deterioration. 

Check engine for oil, coolant, air, fuel, and exhaust leaks (Engine Off and Running). 

Check engine compartment wiring harnesses, connectors, and seals for damage and proper.

Air Induction and Exhaust System

Check exhaust system mountings for looseness and damage.

Check engine exhaust system for leaks, proper routing, and damaged or missing components to include exhaust gas recirculation (EGR) system and after treatment devices, if equipped. 

Check air induction system: piping, charge air cooler, hoses, clamps, and mountings; check for air restrictions and leaks. 

Inspect turbocharger for leaks; check mountings and connections. 

Check operation of engine compression/exhaust brake. 

Service or replace air filter as needed; check and reset air filter restriction indicator. 

Inspect and service crankcase ventilation system. 

Inspect diesel exhaust fluid (DEF) system, to include tanks, lines, gauge pump, and filter. 

Inspect selective catalyst reduction (SCR) system; including diesel exhaust fluid (DEF) for proper levels, leaks, mounting and connections.

Cooling System 

Check operation of fan clutch. 

Inspect radiator (including air flow restriction, leaks, and damage) and mountings. 

Inspect fan assembly and shroud. 

Pressure test cooling system and radiator cap. 

Inspect coolant hoses and clamps. 

Inspect coolant recovery system.

Check coolant for contamination, additive package concentration, aeration, and protection level (freeze point). 

Service coolant filter. 

Inspect water pump.

Lubrication System 

Change engine oil and filters; visually check oil for coolant or fuel contamination; inspect and clean magnetic drain plugs. 

Take an engine oil sample for analysis.

Cab Instruments and Controls 

Inspect key condition and operation of ignition switch. 

Check warning indicators. 

Check instruments; record oil pressure and system voltage. 

Check operation of electronic power take off (PTO) and engine idle speed controls (if applicable). 

Check HVAC controls. 

Check operation of all accessories. 

Use electronic service tool(s) or on-board diagnostic system; retrieve engine monitoring.

Cab and Hood Safety Equipment

Check operation of electric/air horns and reverse warning devices. 

Check condition of spare fuses, safety triangles, fire extinguisher, and all required decals.

Inspect seat belts and sleeper restraints. 

Inspect wiper blades and arms.

Cab and Hood Hardware 

Check operation of wiper and washer. 

Inspect windshield glass for cracks or discoloration, check sun visor. 

Check seat condition, operation, and mounting. 

Check door glass and window operation. 

Inspect steps and grab handles. 

Inspect mirrors, mountings, brackets, and glass. 

Record all observed physical damage. 

Lubricate all cab and hood grease fittings. 

Inspect and lubricate door and hood hinges, latches, strikers, lock cylinders, safety latches, linkages, and cables. 

Inspect cab mountings, hinges, latches, linkages and ride height; service as needed. 

HVAC 

Inspect A/C condenser and lines for condition and visible leaks; check mountings. 

Inspect A/C compressor and lines for condition and visible leaks; check mountings 

Check A/C system condition and operation; check A/C monitoring system, if applicable. 

Check HVAC air inlet filters and ducts; service as needed.

Battery and Starting Systems 

Inspect battery box(es), cover(s), and mountings. 

Inspect battery hold-downs, connections, cables, and cable routing; service as needed. 

Check/record battery state-of-charge (open circuit voltage) and condition. 

Perform battery test (load and/or capacitance). 

Inspect starter, mounting, and connections. 

Engage starter; check for unusual noises, starter drag, and starting difficulty.

Charging System 

Inspect alternator, mountings, cable, wiring, and wiring routing; determine needed action. 

Perform alternator output tests.

Lighting System 

Check operation of interior lights; determine needed action. 

Check all exterior lights, lenses, reflectors, and conspicuity tape; check headlight alignment; determine needed action. 

Inspect and test tractor-to-trailer multi-wire connector(s), cable(s), and holder(s); determine.

Hydraulic Brakes 

Check master cylinder fluid level and condition. 

Inspect brake lines, fittings, flexible hoses, and valves for leaks and damage. 

Check parking brake operation; inspect parking brake application and holding devices; adjust as needed. 

Check operation of hydraulic system: pedal travel, pedal effort, pedal feel. 

Inspect calipers for leakage, binding and damage. 

Inspect brake assist system (booster), hoses and control valves, check reservoir fluid level and condition. 

Inspect and record brake lining/pad condition, thickness, and contamination. 

Inspect and record condition of brake rotors. 

Check antilock brake system wiring, connectors, seals, and harnesses for damage and proper routing.

Diesel Drivetrain 

Check operation of clutch, clutch brake, and gearshift. 

Check clutch linkage/cable for looseness or binding, if applicable. 

Check hydraulic clutch slave and master cylinders, lines, fittings, and hoses, if applicable. 

Check clutch adjustment; adjust as needed. 

Check transmission case, seals, filter, hoses, lines and cooler for cracks and leaks. 

Inspect transmission breather. 

Inspect transmission mounts. 

Check transmission oil level, type, and condition. 

Inspect U-joints, yokes, driveshafts, boots/seals, center bearings, and mounting hardware for looseness, damage, and proper phasing. 

Inspect axle housing(s) for cracks and leaks. 

Inspect axle breather(s). 

Lubricate all drive train grease fittings. 

Check drive axle(s) oil level, type, and condition. 

Change drive axle(s) oil and filter/screen, if applicable, check and clean magnetic plugs. 

Check transmission wiring, connectors, seals, and harnesses for damage and proper routing. 

Change transmission oil and filter, if applicable, check and clean magnetic plugs. 

Check interaxle differential lock operation. 

Check transmission range shift operation.

Suspension and Steering Systems 

Check steering wheel operation for free play and binding. 

Check power steering pump, mounting, and hoses for leaks, condition, and routing; check fluid level. 

Change power steering fluid and filter. 

Inspect steering gear for leaks and secure mounting. 

Inspect steering shaft U-joints, pinch bolts, splines, pitman arm-to-steering sector shaft, tie rod ends, and linkages. 

Check kingpins for wear. 

Check wheel bearings for looseness and noise. 

Check oil level and condition in all non-drive hubs; check for leaks. 

Inspect springs, pins, hangers, shackles, spring U-bolts, and insulators. 

Inspect shock absorbers for leaks and secure mounting. 

Inspect air suspension springs, mounts, hoses, valves, linkage, and fittings for leaks and damage. 

Check and record suspension ride height. 

Lubricate all suspension and steering grease fittings. 

Check axle locating components (radius, torque, and/or track rods).

Tires and Wheels 

Inspect tires for wear patterns and proper mounting. 

Inspect tires for cuts, cracks, bulges, and sidewall damage. 

Inspect valve caps and stems; determine needed action.

Measure and record tread depth; probe for imbedded debris. 

Check and record air pressure; adjust air pressure in accordance with manufacturers’ specifications. 

Check wheel mounting hardware condition; determine needed action. 

Inspect wheels for cracks, damage and proper hand hold alignment. 

Check tire matching (diameter and tread) on single and dual tire applications.