Side Door Hinges — Inspect the door hinge for wear and damage.
Cab Access Steps and Handles — Inspect all steps and grab handles for proper mounting and the absence of cracks.
Heater/AC Filter — Remove the HVAC filter and vacuum or blow clean with low-pressure air.
Rear Door Roller/Slide Adjustment — Inspect the roller and slide adjustment for wear and damage.
Glad-Hand Seals and Trailer Air Lines — Inspect seals for tears and wear. Check air lines for kinks or cracks. Trailer Light Cord (If Applicable) — Inspect light cord for cuts and abrasions. As the lights of the truck are checked, confirm that a trailer connected with the light cord also has lights. This can be done either with a trailer connected or with a “test box”.
Headlights/Marker Lights — Start the engine, turn on light switches and confirm lights are burning.
Turn Signals — With the key on, activate the turn signal switch and the flasher to confirm that the turn signals are working.
Strobe Light (If Applicable) — With the key on, turn on the strobe light to confirm its operation.
6.1 Checklists – 6 Scheduled Maintenance 89
Spotlights — With the key on, turn on the spotlight(s) to confirm its operation.
Wiper Blades — Inspect wiper blades for tears or exces- sive wear.
Windshield Washer Fluid Level (If Applicable) — Fill the washer bottle as necessary.
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Cab Up
Cab Tilt Pump — Pull the cab release cable and activate the cab tilt switch. The cab should rise.
Cab Safety Prop — Inspect the cab safety prop that en- closes the cab lift cylinder. It should drop freely into place to support the cab when it is in the raised position. The low- er cab cylinder pin and bracket should be inspected for signs of fatigue.
Cab Suspension and Latch — Inspect the linkages of the suspension system for excessive wear and proper align- ment. Inspect the air bag for leaks or signs of abrasion. In- spect the lock jaw for excessive wear and proper operation. Intake Ducting for Leaks — Inspect all engine clean air tubes and hoses for leaks. All clamps should be checked for proper torque and all joints should be properly aligned. Radiator for Leaks — Inspect the radiator core and tanks for signs of coolant leaks.
Radiator Mounts — Inspect the radiator mounts for wear or excessive looseness.
Coolant Level and Concentration — Check the cooling system level. Coolant should be visible in the radiator sight glass. It is not necessary for the coolant to be at the top of the sight glass. Test and maintain the proper antifreeze lev- el of concentration as outlined in the appropriate engine op- erator’s manual.
Coolant Additive (If Applicable) — Using the appropriate test method for the diesel coolant additive (DCA) or supple- mental coolant additive (SCA) being used (e.g., Nalcool), maintain the recommended level of concentration as out- lined in the applicable engine operator’s guide.
Change Engine Coolant — Flush the cooling system and replace with clean coolant of the appropriate concentration. Coolant Hoses and Clamps — Inspect all hoses for abra- sion, cracks, holes and routing. Check all clamps for proper torque.
Fan Clutch for Operation (If Applicable) — Run the en- gine to confirm that the fan clutch engages at the proper temperature.
Engine Cooling Fan for Cracks — Shut the engine off if running. Inspect fan blades for signs of cracking.
90 6.1 Checklists – 6 Scheduled Maintenance
Maintenance manual Ottawa 4x2, 6x4
Engine Belts and Tensioner — Inspect belt(s) for crack- ing and wear. The belt tensioner should be checked for proper operation.
Change Engine Coolant Filter (If Applicable) — Replace the engine coolant filter. A filter containing the proper SCA should be used to maintain the specified concentration level.
Engine and Transmission for Leaks — Perform a visual inspection of the engine and transmission looking for fluid leaks visible from above.
Drain Fuel/Water Separator — Open the drain valve on the fuel/water separator and allow water to drain from the filter.
Change Fuel/Water Separator — Replace the fuel filter following the instructions in the engine operator’s manual. Air Restriction Gauge (If Applicable) — Record the read- ing on the gauge, reset, start the engine, run to high idle and shut off the engine. If the reading remains zero, the gauge may be defective or the intake piping has a leak. Dis- cover the cause and repair or replace parts as necessary. If the initial gauge reading indicates that the filter should be changed, do so at this time.
Change Air Filter — The air filter should be changed as necessary. If the truck is equipped with a restriction gauge, replace the filter when the gauge indicates.
Change Air Dryer Desiccant (If Applicable) — The des- iccant should be changed as necessary. Change as soon as water is evident when the system air tanks are drained. Exhaust System — Visually inspect all of the exhaust sys- tem components for leaks and/or damage.
Transmission Fluid Level — With the engine running, use the transmission dipstick to check the fluid level per the guidelines in the transmission operator’s manual.
Clean Transmission Breather — Confirm that the breath- er, located on top of the transmission, is clean and the pas- sage is open. Do not spray directly with high pressure or cleaning solvents.
Tighten Cab-to-Deck Mounting Bolts — Tighten the cab-to-deck fasteners.
6.1 Checklists – 6 Scheduled Maintenance 91