Maintenance Management Flashcards
What are the various actions associated with vehicle maintenance.
Inspection, lubrication, adjustment, cleaning, testing, and replacing components that have failed or are on the verge of failure. These actions can be performed either on a scheduled, periodic basis, which is called preventative maintenance or on an unscheduled basis which is referred to as demand, or breakdowns maintenance.
Define preventive maintenance
- The care and servicing by personnel for the purpose of maintaining equipment and facilities in satisfactory operating condition by providing for systematic inspection, detection, and correction of incipient failures either before they occur or before they develop into major defects. 2. Maintenance, including tests, measurements, adjustments, and parts replacements, performed specifically to prevent faults from occurring.
Define demand or breakdown maintenance.
Maintenance performed on an unscheduled basis
Define motor vehicle maintenance.
Motor vehicle maintenance consists of the following actions: inspection, lubrication, adjustment, cleaning, testing, and replacing components that have failed or are on the verge of failure.
What impact does lack of maintenance have on the vehicles?
If maintenance is not performed on a periodic basis, the life-span of the vehicles will
be reduced, requiring their replacement or that of their more costly systems/
components at a date earlier than should be expected. If PM activities are not thoroughly performed, vehicles will be prone to more frequent breakdowns
What impact does lack of maintenance have on the drivers?
Employees will be inconvenienced, productivity will drop, work backlog will develop and the vehicle maintenance personnel may be blamed.
What impact does lack of maintenance have on the vehicle maintenance department?
The workload of the maintenance department will be characterized by extreme peaks and valleys, requiring overtime or temporary help to reduce the peaks. During the valley periods, portions of the maintenance workforce will be idle. When it becomes necessary to use a pool or rental vehicle to replace a downed fleet vehicle, the fleet will consume additional resources.
What impact does lack of maintenance have on budget forecasting?
Fleet managers will be unable to forecast maintenance budget, not only from a personnel aspect, but from an outlay of cash of parts and supplies.
What impact does a thorough maintenance program have on vehicle remarketing?
When the time comes to replace vehicles, those with accurate, proven PM records may sell for more than those without.
What are the two major components of a PM program?
A checklist of maintenance actions that need to be performed periodically and the interval or frequency with which these actions are performed.
List six principal sources for determining maintenance actions.
- Manufacturer’s list of recommended maintained actions. 2. Our past experiences. 3. Operating environment. 4. Records of unscheduled maintenance, individual vehicle records and vehicle class records. 5. List of emergency repairs to trouble-prone systems. 6. Pattern of unscheduled/emergency repairs.
What are two primary factors for determining service intervals?
Odometer or time.
When would fuel consumption be the preferred factor for determining PM interval?
For vehicles that incur significant or regular idle time but are not equipped with hour meters.
Why would fuel consumption be important to PM scheduling?
Tracked consumption can trigger scheduling a PM at a preset number of gallons or liters consumed. Needs to be real time data in order to accurately project scheduling.
How does a good PM program impact warranty recovery?
It is important to establish a service pattern that meets all of the manufacturers’ requirements to protect the vehicle’s warranty and incorporate checks for potential problem areas in the fleet. Failure to follow manufacturer guidelines may result in loss of warranty and/or loss of goodwill warranty policy adjustments beyond standard warranty parameters. It also helps keep track of items that are eligible for recovery and then be able to recover for them.
What is the objective of predictive maintenance?
Perform services/component replacement before failure occurs, minimize downtime. Balance slightly higher pats costs for overall lower labor costs.
What financial impact does maintaining to severe service levels vs. normal levels have?
Severe is more expensive.
What regulatory agency requires an annual inspection for commercial vehicles?
Federal Motor Carrier Regulations (FMCSR) require annual inspections for vehicles or trailers with gross vehicle weight or combined gross weight greater than 10,000 pounds and involved in interstate transportation.
Identify three benefits of properly maintained tires.
Improve fuel economy
Extend tire life
Provide better vehicle handling
Help to prevent avoidable breakdowns and collisions
Reduce exhaust emissions that contribute to environmental, health and climate change problems.
What tire condition increases rolling resistance, reduces tread life, and increases fuel consumption?
Underinflation.
What tire condition results in reduced grip on the road, harsh ride, handling issues and increased wear on the tires?
Overinflation.
Where on a vehicle is the tire information label usually located?
Tire information is usually located on the driver’s side door or inside of the driver’s side door frame.
Where are the tread wear indicators located?
The tread wear indicator is a small raised bar that runs across the grooves of the tire tread, marking the minimum allowable tread depth.
How is the aspect ratio of the tire defined?
It is the ratio of the height of the sidewall to the width, expressed as a percentage.
Identify four engine oil functions.
Reduce friction in bearings, gears, and valve train.
Protect against corrosion of all engine parts.
Suspend contaminants such as sand, dirt, soot and metals.
Cools by transferring heat from engine parts.
Assist in sealing piston rings during combustion.
Handle combustion by-products such as water, soot, gasses and acids.
Neutralize nitric, sulfuric, and carboxylic acids.
Resist thickening from thermal & oxidative breakdown
Keep metal surfaces clean by preventing sludge and varnish deposits.
Who defines engine oil viscosity ratings?
Engine Oil Viscosity grades are defined by the Society of Automotive Engineers SAE J300 Engine Oil Viscosity Classification System.
What grade of oil should be used in a vehicle?
Engine manufacturer’s recommendations should be used to determine the grade of oil to be used.
How often engine tune-ups are typically required?
Tune-up is very minimal compared to the past. Some of today’s vehicles can go 100,000 miles before a tune-up, and then it is usually just changing the spark plugs and cleaning a sensor or two.
How often should cooling systems be service?
Either 2 years/30,000 miles or if you have Dex-Cool 5 years/100,000 miles
Identify three benefits related to anti-lock braking systems.
Avoid crashes, allows vehicle to stop in a straight line giving you more control, and maximum braking performance.
