INSTRUMENTS AND CONTROLS

Caution

Maximum amperage for all power r eceptacles cab amps. NOT exceed maximum amperage equipment damage may r esult.

Before working inspecting a vehicle, set the parking brakes, place the transmission neutral and block the wheels. Failure can result unexpected vehicle movement and can cause serious personal injury death.

Safety the most important and obvious reason for doing a pre - trip inspection. Federal and state laws require inspection performed the driver . Federal and state inspectors also inspect commercial vehicles. unsafe vehicle can placed until the driver owner corrects the deficiency . Owners and operators should familiarize themselves with sections CFR 396.1 1 and 396.13 concerning Federal requirements for vehicle inspection. Certain other laws may also apply .

Section CFR 396.13 states that all motor carrier drivers must complete a written report the end each work day for each vehicle operated, covering most what covered the pre - trip list. The report should list all defects deficiencies discovered the driver . A pre - trip inspection prepares for the end - - work report.

Starting the next page are suggested guidelines used performing tractor and trailer pre - trip Depending the application the vehicle being these guidelines should modified include other necessary inspection For steps and grab handles should checked daily refuse trucks because the operator getting and out the cab more frequently any component system does not pass this inspection, must corrected before operating the vehicle. Whenever equipment requires adjustment, replacement, repair lubrication, refer the Service Manuals contact authorized Mack T ruck dealer for the correct procedures, specifications and intervals.

T ake your time going through the pre - trip Remember that a careful pre - trip inspection saves time eliminating unscheduled stops for correcting a faulty

The following information has been provided the American T rucking Association developed the D.O.T . fice Motor Carriers (BMCS).

Pre-T rip Inspection Quick List

Inspect the vehicle a circular manner

Approaching the V ehicle

• Check under the vehicle for coolant leaks other signs

• Check body surfaces for signs breaks damage.

Preparation

• Open drain cocks air tanks let the tanks

• Chock wheels vehicle and, hooked up, trailer .

• Close air tank drain cocks.

• Start the engine and let the air pressure build Stop

• Switch parking lights and hazard lights.

• Apply parking

• Pull the hood release lever release the hood raise

Step Left Side the Cab Left Front Wheel

• Check condition wheel rim. Especially look for cracks, missing lockrings, bent broken studs, clamps lugs.

• Check condition tire: properly serious tread wear any signs misalignment; valve stem not touching rim brake drum; valve cap

• Check wheel bearing and hub: obvious leaking outside inside wheel. V erify correct oil level hub.

Left Front Suspension

• Check condition spring

U - bolts: breaks

• Check shock absorber condition.

Left Front Brake

• Condition brake With brakes look for a noticeable gap between lining and (This check cannot made dust covers are place.)

• Condition brake air

• Check brake chamber mounting bolts and bracket.

Condition Front Axle and Steering System, Left Side

• loose, worn, bent, damaged missing parts.

Under Hood, Left Side

• Check coolant hose

• Check condition fan drive belts.

• Check engine and surrounding areas for coolant, oil and fuel leaks.

• Check wiring harnesses for signs

Step Front Cab Area

Condition W indshield

• Check for damage and clean dirty

• Check windshield wiper arms for proper spring tension.

• Check wiper blades for any rubber and attachment

Lights and Reflectors

• Lower hood and inspect parking, clearance and identification lights hood and cab. They should clean and the proper color .

• Reflectors clean and proper color

• Left and right front turn signal lights and headlights clean and proper color . Raise hood.

Grille

• Check that charge air cooler and radiator bugscreens are clean and undamaged.

Step Right Side Cab Area

Right Front Wheel

• Check condition wheel rim. Especially look for cracks, missing lockrings, bent broken studs, clamps lugs.

• Check condition tire: properly serious tread wear any signs misalignment; valve stem not touching rim brake drum; valve cap https://www.truck-manuals.net/mack/

• Check wheel bearing and hub: obvious leaking outside inside V erify correct oil level

Right Front Suspension

• Check condition spring, spring hangers, shackles, U - bolts: cracks, breaks shifting.

• Shock absorber condition.

Right Front Brake

• Condition brake drum. With brakes released, look for a noticeable gap between lining and drum. (This check cannot made dust covers are place.)

• Condition brake air hose: check for any chafing.

• Check brake chamber mounting bolts and

• With brakes applied released, look for conspicuously dif ferent positions the slack adjusters.

Condition Front Axle and Steering System, Right Side

• damaged missing Under Hood, Right Side

• Check condition coolant and heater hoses.

• Check condition fan drive

• Check engine and surrounding areas for coolant, oil and fuel leaks.

• Check fuel separator sight glass and drain necessary Check for

• Check wiring harnesses for signs damage.

• Check air filter with brackets and hoses for loose connections Check filter gauge, mounted the filter .

Step Right Saddle T ank Area

Right Fuel T ank(s)

• Securely mounted and not damaged leaking.

• Fuel lines secure and not Check that shut - f valves are

• T ank(s) full fuel. Cap and secure.

Condition V isible Components

• Rear engine: not

• T ransmission: not leaking. equipped with oil cooler , check cooler , hoses and fittings for leaks.

• Check drive shaft.

• Exhaust system: not not touching fuel air

• Frame and cross members: bends, cracks breaks.

• Air tubing and electrical wiring: secured against snagging and

Step Right Rear V ehicle Area

Dual Wheels, One T Axles

• Check condition wheels and Especially look for missing bent broken studs, clamps

• Check condition tires: properly inflated, serious cuts, bulges, tread wear any signs misalignment; valve stems not touching rims brake drums; valve caps place and objects stuck between the

• Check that both tires are same type, for example, not mixed radial and bias type and that their circumferences are matched.

• Check wheel bearing and hub: obvious leaking outside inside Suspension

• Check condition springs (leaf air), spring hangers, shackles and Ubolts.

• Axle

Brakes

• Condition brake drums. With brakes released, look for a noticeable gap between lining and drum. (This check cannot made dust covers are place.)

• Condition brake hoses: check for any

• Check brake chamber mounting bolts and brackets.

• With brakes applied look for conspicuously dif ferent positions the slack

Step Rear V ehicle Area

Frame Area

• Frame cross members not cracked otherwise damaged

• Check that air tubing and electrical lines are properly secured the frame with damage chafing.

Lights and Reflectors

• T ail brake lights and turn signal lights: clean and proper color

Step Coupling System Area

Fifth Wheel

• Securely mounted the

• missing damaged parts.

• Check that trunnion and plate are properly

Sliding Fifth Wheel

• Mechanism not worn, bent, damaged parts missing.

• Properly

• All locking pins present and locked place.

• air operated: air

Air T ubing and Electric Lines V isible From This Point

• Should secure from dangling.

• Both air lines and electric line should free from oil and

Step Left Saddle T ank and Left Rear V ehicle Wheels Area

Dual Wheels, One T Axles

• Check condition wheels and Especially look for missing bent broken clamps

• Check condition tires: properly inflated, serious cuts, bulges, tread wear any signs misalignment; valve stems not touching wheels, rims brake drums; valve caps place and objects stuck between the wheels.

• Check that both tires are same for not mixed radial and bias type and that their circumferences are

• Check wheel bearing and hub: obvious leaking outside inside

Suspension

• Check condition springs (leaf air), spring hangers, shackles and Ubolts, cracks, breaks shifting.

Brakes

• Condition brake With brakes look for a noticeable gap between lining and (This check cannot made dust covers are

• Condition brake hoses: check for any chafing.

• Check brake chamber mounting bolts and brackets.

• With brakes applied look for conspicuously dif ferent positions the slack

Condition V isible Components

• T ransmission: not leaking.

• Drive shaft: looks

• Exhaust system: secure, not leaking, not touching wires, fuel air tubing.

• Frame and cross members: cracks

• Air tubing and electrical wiring: secured against snagging and chafing.

Left Fuel T ank(s)

• Securely mounted and not damaged

• Fuel lines secure and not leaking. Check that shut - f valves are open.

• T ank(s) full Cap and Battery Area

• Open the battery box. Battery box securely mounted vehicle.

• Batteries secured against

• Battery cases not broken leaking. Battery cables free from damage.

• T ops batteries and terminals clean and free from foreign

• equipped, replace battery lid and make sure securely fastened.

Step T railer Front Area

Air and Electrical Connections

• Glad hands properly mounted, free from damage and not leaking.

• T railer cord receptacle properly mounted, free damage; plug properly seated and safety catch engaged prevent accidental disconnect.

• Air and electrical lines properly secured against tangling, snagging and chafing with suf ficient slack for turns.

Hooking T o T railer

Hook - Preparation

• Check kingpin and mounting plate trailer , free from wear , bends damage.

• Chock trailer

Fifth Wheel T railer Hitch

• visible space between fifth wheel and trailer .

• Locking jaws around the shank and not the head

• Release lever properly seated and safety latch/lock engaged.

• Check all connections dolly trailer hitch and safety chains are secured.

• Check function trailer air supply valve and trailer

Sliding Fifth Wheel

• Check that fifth wheel not far forward that the tractor frame will strike the landing gear during turns.

Note: Refer the trailer manufacturer ’ s manual for specific information the trailer

Step 10: Right Side T railer Area

Landing Gear Dolly Area

• Fully raised; missing damaged

• Crank handle present and secured.

• power air/hydraulic

Spare Wheel(s)

• Carrier rack not

• Spare wheel securely mounted rack.

• T ire and wheel condition adequate for a spare: proper size, properly inflated.

Lights and Reflectors

• T railer side clearance lights: clean, operating and proper color .

• Reflectors clean and proper color

Frame and Body

• Frame and crossmembers not bent, cracked, damaged missing.

• Proper

• Body parts not damaged missing.

Step 1 Right Rear T railer Wheel

Dual Wheels, One T Axles

• Check condition wheels and rims. Especially look for cracks, missing lockrings, bent broken spacers, studs, clamps lugs.

• Check condition tires: properly serious tread wear any signs misalignment; valve stems not touching rims brake drums; valve caps place and objects stuck between the

• Check that both tires are same type, for example, not mixed radial and bias type and that their circumferences are matched.

• Check wheel bearing and hub: obvious leaking outside inside

Suspension

• Condition springs (leaf air), spring hangers, shackles and Ubolts.

• Axle

• Condition torque rod arms.

• equipped with sliding axles, check position and alignment. Look for damaged, worn missing parts, all locks present, fully place and locked.

• Flexible air tubing not crimped otherwise Secured against dragging and