Course Description

ELECTRICAL AND ELECTRONIC SYSTEMS

5

0

30

Battery and Starting Systems

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

Inspect battery hold downs, cables, and connections

Check/record battery state-of-charge

Inspect starter, mounting, and connections

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

Charging System

Inspect alternator, mountings, and wiring

Lighting System

Check operation of interior lamps

Check all exterior lamps, lenses, and reflectors; check headlamp alignment

Inspect and test trailer connector, cable, and holder

FRAME AND CHASSIS SYSTEMS

5

0

30

Air Brakes

Check parking brake operation

Record air governor cut-out setting (psi)

Check air drier drain valve operation

Check air system for leaks (brakes released)

Check air system for leaks (brakes applied)

Test one-way and double-check valves

Check low air pressure warning devices

Check air governor cut-in pressure

Check spring brake inversion system

Check tractor protection valve

Test air pressure build-up time

Inspect coupling air lines, holders, and gladhands

Check brake chambers and air lines for secure mountings and damage

Service desiccant pack in air drier

Inspect and record front and rear brake lining/pad condition and thickness

Inspect condition of front and rear brake drums/rotors

Check operation of front and rear brake manual slack adjusters; adjust as needed

Check operation and adjustment of front and rear brake automatic slack adjusters

Lubricate all grease fittings

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

Check operation of hydraulic system; pedal travel, pedal effort, residual (holding) pressure

Inspect wheel cylinders/calipers for leakage and damage

Inspect power brake booster(s), hoses, and check/control valves

Inspect and record front and rear brake lining/pad condition and thickness

Inspect condition of front and rear brake drums/rotors

Check drum brake adjustment; adjust as needed

Drive Train

Check operation of clutch and clutch brake

Check clutch linkage for looseness or binding

Check clutch adjustment

Check transmission(s) case, seals, filter, and cooler for cracks and leaks

Inspect transmissions(s) breather(s)

Inspect transmissions(s) mounts

Check transmission(s) oil level and condition

Inspect U-joints, yokes, drive lines, and center bearings for looseness, damage, and proper phasing

Inspect axle housing(s) for cracks and lube leaks

Inspect axle breather(s)

Lubricate all grease fittings

Check drive axle(s) oil level and condition

Change drive axle(s) lube and filter; check magnetic plugs

Check two-speed axle unit; check magnetic plugs

Suspension and Steering Systems

Check steering wheel operation for free play or binding

Check power steering pump and hoses for leaks and mounting; check fluid level

Change power steering fluid and filter

Inspect steering gear for leaks and mounting

Inspect steering shaft U-joints, pinch bolts, splines, pitman arm-to-steering sector shaft, tie rod ends, and linkage assist power steering cylinders

Check king pin wear

Check front and rear wheel bearings for looseness and noise

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

Remove and inspect front and rear wheel bearings; reassemble and adjust

Inspect front and rear springs, hangers, shackles, spring U-bolts, and insulators

Inspect shock absorbers for leaks and mounting

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

Check and record suspension ride height

Lubricate all grease fittings

Tires and Wheels

Inspect tires for irregular wear patterns and tread direction

Inspect tires for cuts and sidewall damage

Inspect valve caps

Measure and record tread depth

Check and record air pressure

Check for loose lugs and/or slipped wheels

Inspect wheels and spacers for cracks or damage

Check tire matching (diameter and tread) on dual tire installations

Frame and 5^th Wheel

Inspect fifth wheel mounting bolts, air lines, and locks

Test operation of fifth wheel locking device

Check mud flaps and brackets

Check pintle hook and mounting

Lubricate all grease fittings

Inspect frame and frame members for cracks and damage