LTI Maintenance Flashcards
Engine. Run engine for 10 minutes at high idle (1000 rpm) with air conditioning at maximum cool and all electrical accessories activated. Monitor dash gauges during test for any abnormal readings. After test inspect for any fluid leakage under and around engine.
Weekly
Aerial Hours. Note and record current aerial hours.
Bi-monthly
Air tank(s). Drain each and every air tank of water and oil contaminants. Inspect for any abnormal amounts of oil drained from air tanks.
Weekly
Steering Box and Steering linkage. (Engine shut down). Position front wheels straight ahead (wheels on ground). Have an assistant move the steering wheel back and forth with short (4 to 6) rapid movements. At the same time inspect steering linkage and connections for any looseness or excessive movement. You can place your finger on the two mating parts of each steering connection and “feel” for any disproportionate movement between the two. Any detectable movement should be noted and reported.
Bi-monthly
Onan generator. Run the engine with an electrical load until warm. Check operation and check for leaks.
Weekly
Differential. Check oil level. Oil level should be even with the plug opening.
Bi-monthly
Air Cleaner. CAB FULL TILT POSITION. Inspect hose(s), ducts, pipe, connections, etc. between air cleaner and engine intake for wear, breaks, and mounting. Air cleaner element is to be replaced every other year or on an “as needed” basis. This is determined by the amount of inlet restriction measured by the engine’s diagnostic system.
Bi-monthly
Engine water pump. CAB FULL TILT POSITION. Check water pump for evidence of coolant leakage. Look at condition of coolant hose and connections.
Weekly
Generator Hours. Note and record current Onan generator hours.
Bi-monthly
Fuel Supply. Maintain to capacity.
Daily
Engine. Look for any signs of fluid leakage.
Daily
Engine Hours. Note and record current engine hours.
Bi-monthly
Odometer reading. Note and record current mileage.
Bi-monthly
Tires. With the approved tire tread depth gauge, measure depth at the center fo the tire tread. A reading of 1/8” or less should be reported on the F-377 and called in for needing replacement
Bi-monthly
Engine mounts. CAB FULL TILT POSITION. Inspect engine mounts for looseness and/or damage to rubber mounts
Bi-monthly
Wiring. CAB FULL TILT POSITION. Perform visual ONLY of all wiring in engine compartment for routing, connections, wear and/or corrosion
Bi-monthly
Brakes. (Engine shut down). Inspect all mechanical components for looseness, wear, breakage and/or missing components. Inspect air lines for leakage, wear and/or breaks. Inspect brake linings and rotors for wear, cracks and breaks. Inspect brake push rod travel for a maximum 2” stroke on all six wheels. When applying and holding the brakes for brake push rod travel measurement, grasp and shake the brake line(s) to the brake chamber and listen for any air leakage.
Bi-monthly
Tires. Check pressure by gauge. Check for loose, broken and/or missing wheel lugs.
Weekly
Oil, Onan engine. Maintain to capacity.
Daily
Seat belts. Look for cuts/deterioration. Check operation of latch mechanism and integrity of mounts.
Daily
Tire/wheels. Perform visual check on wheels and tires. Inspect tire tread and sidewall condition for excessive wear, any cuts, and bruises or tread separation. Inspect wheels for loose, missing or broken wheel lugs; cracks, bends or any wheel misalignment.
Daily
Running Gear (Powertrain). Look for conditions/tightness of bolts, nuts, fittings, shafts, cables, etc.
Daily
Emergency Power Unit (EPU). Run EPU, circulate fluid, check operation and check for leaks.
Weekly
Alternator. CAB FULL TILT POSITION. Inspect for secure mount to engine. Inspect belts for wear and tension. Inspect wiring to alternator for signs of looseness, corrosion, chafing/rubbing and proper routing. Start engine and observe alternator LED. The LED should emit a “green” color if it is functioning properly.
Bi-monthly
Drive belts. CAB FULL TILT POSITION. Inspect all belts for wear, cuts and tension. Report defect if belt tension is loose enough to allow more than 1/2” deflection measured at a point midway between pulleys.
Bi-monthly
Tiller cab. Inspect door hinges and latches.
Weekly
Auxiliary front wheel lock. Engine off. Wheels chocked. Set parking brake
(pull out yellow knob). Set aux front wheel lock (push in black knob). Have assistant observe that the front axle brake push rods have actuated. Listen for any leaks. Release parking brake.
Aux. brake control knob should “pop” out.
Weekly
Hydraulic oil reservoir. Check fluid level.
Weekly
Fuel filter/Water separator. Check for water or debris. Drain as needed.
Weekly
Drive line. Park apparatus on level surface, chock wheels and release parking brake. Inspect drive line(s) tubes for damage (cracked welds, bending, misalignment). Inspect driveline u-joints for wear/looseness. The most effective procedure is to position yourself directly under the u-joint, place both hands on the end of the drive line tube next to the u-joint and try to move the tube up and down. Try to observe or “feel” for any measurable up and down movement. If any movement is detected it should be noted and reported. Any excess movement in the road transmission and drive axle bearings can be detected in this manner. Check all drive lines and u-joints in this manner.
Bi-monthly
Windshield wipers. Check blades for wear. Inspect hose for cracks and leaks. Wipers shall not be operated on a dry windshield or with defective blades.
Weekly
Radio. Inspect all accessible components for secure mounting. Inspect wiring for proper connections, cleanliness and routing.
Bi-monthly
Power steering. CAB FULL TILT POSITION. Manually check for proper steering fluid level using dipstick.
Weekly
Starter. CAB FULL TILT POSITION. Inspect starter for mounting and wiring. Operate starter motor and listen for any unusual noise or operating characteristics. While cranking, observe starter for any movement; movement will indicate looseness at mounts.
Bi-monthly
Coolant, engine radiator. Maintain to capacity.
Daily
Axle hubs (front and tiller). Check fluid level.
Weekly
Brakes, air reservoir pressure. Verify that system pressure in both primary and secondary systems is at least 90 psi at start of shift. Perform one-minute brake application leak down test. (Hold down brake pedal for one minute with engine off and observe air pressure gauges for any loss and listen for any air leaks).
Daily
Aerial swing drive. Check fluid level. Pipe plug is located near the
top of the swing drive. Remove check/fill cap. Oil should be clearly visible above top face of the gear, but not higher than bottom of check/fill plug opening. Refill as needed. Check with apparatus level and hydraulic system shut down.
Weekly
Fuel pump. CAB FULL TILT POSITION. Inspect fuel pump for signs of loose mounting and examine fuel lines for hard or spongy conditions.
Bi-monthly
Cooling system. CAB FULL TILT POSITION. Inspect radiator for secure mount, signs of leakage, obstruction of cooling fins (front and rear sections of radiator), fit of radiator cap, proper coolant level. Inspect coolant hoses for signs of leakage, wear, bulging, chafing, cuts and incorrect routing. Inspect radiator sight glass for signs of contamination. Coolant should be green in color. Inspect water pump for proper mount and any signs of leakage around the “weep” hole and the pump to block mount area. Inspect fan for cracks, missing blades, shroud to blade clearance.
Bi-monthly
Oil, engine. Maintain to capacity.
Daily
Air compressor. CAB
FULL TILT POSITION. Inspect for secure mount to engine, audible air leaks, water and oil leaks around compressor area and general
condition of hose(s) attached to compressor.
Bi-monthly
Water filter. Inspect for proper fluid color, level and leaks.
Weekly
Aerial ladder. Operate and test aerial and outrigger jacks. Inspect drive pinion bearing gear teeth for wear, alignment and lubrication. Inspect aerial control console and communication system. Inspect collector rings under turntable for corrosion and brushes for wear. Inspect hoses, lines, etc. under turntable.
Weekly
Batteries. CAB FULL TILT POSITION. Check that all battery connections are clean and tight. Observe battery “self-check eye” for green color. If not green, note and report.
Weekly
Exhaust system. CAB FULL TILT POSITION. Inspect exhaust system for evidence of leaks, damage; loose/missing fasteners, clamps, etc.
Weekly
Brakes. Check disc brake lining thickness: at 1/4” note and report. Less than 1/4” call in and schedule brake job. Inspect rotors for any cracks extending to the edge of the rotor. Look for any excess oil or grease on brake rotors/lining and calipers.
Weekly
Coolant, Onan engine. Maintain to capacity.
Daily
Fifth wheel pivot shafts. Lubricate at each pivot shaft zerk.
Weekly
Door Hinges/Locks. Check for worn hinges, proper alignment and lock mechanism function.
Bi-monthly
Signal and lighting system. Inspect ALL lights for proper operation.
Daily
Steering Column. Grasp top of steering column and attempt to move back and forth. If any movement is detected make note and report.
Bi-monthly
Parking brakes. Set parking brake. Start engine. Depress and hold brake pedal. Place transmission in Drive. Remove foot pressure from brake pedal and observe if brakes hold apparatus.
Weekly
Springs, suspension and frame. CAB FULL TILT POSITION. Inspect springs for broken
or missing leafs, clamps U-bolts, shackles, etc. Inspect shocks for proper mounting and condition. Inspect frame rails and frame members for breaks, cracks, bad welds, loose rivets and bent sections.
Weekly
Electrical system. Check system voltage with engine off and all electrical accessories off (12.9 Volts minimum). Start and run engine, engage high idle and check voltage again (13.7 Volts minimum).
Daily
Transmission fluid. CAB FULL TILT POSITION. Perform manual “cold check” of transmission fluid
Weekly
Air conditioning unit. CAB FULL TILT POSITION. Check belts for wear and proper tension. Check for any leaks in A/C system (these will show up as an oily residue around the leak).
Weekly
