VEHICLE PREVENTIVE MAINTENANCE

-means doing something before the machine or equipment or the vehicle breakdown.

PRE-TRIP INSPECTION

• T – Tire ( check pressure, thread, ply, spare tire)• H- Horn (Check if functioning, adjust sound if necessary)• E- Engine ( check for any leak or sign of overheating)• B- Battery ( check solution, cables connection, terminals )• L –Light (check all lights if functioning)• O- Oil ( check oil level or leak with in engine parts)• W –Water ( check level in radiator)• B- Brake System ( Check brake fluid level, brake lining)• A – Air ( Pressure ( check for air leak• G – Gas or Fuel Gauge ( Check fuel level, all if properly functioning)

Cooling System• Cooling System – maintains the efficient running temperature

in all running speed and driving conditions.HOW?• Radiator is free from any dirt and corrosion and no means of

any leakage.• Good condition and Correct belt deflection (7-11 mm).• Radiator hoses are in good condition/hose clamps are properly

fit.• Regular changing of coolant or water.• Thermostat is in good condition.• Fan blades are in good condition.

Lubricating System• Lubricating system –lubricates moving parts in order to

minimize wear and power loss due to friction and extending engine’s life.

HOW?• Making visual check – oil level must be at full level but see to it

that vehicle is on flat/plain surface.• Oil must have no contamination of dirt.• Change engine oil in every 5,ooo km or maximum of 6,000 km.• Change oil filter

Fuel System

• Fuel System- supplies combustible mixture of air and fuel.

• How?• No leakage at any fuel lines or fitting.• No leakage in intake manifold• No clogged up in air cleaner.• No clogged up in fuel filter• Injectors can deliver proper spray of fuel.

Correct spray pattern Check correct spray pattern

Check Nozzle For Correct Spray Pattern

Battery

• Battery – supplies electrical energy to starter motor during cranking. It has a minimum cranking speed of 250 revolution per minute (rpm).

• HOW?• Battery terminals, clamps should free from any means

dirt's or corrosion.• Battery cables are properly tighten.• Good grounding connection.• Maintain proper level of battery solution add distilled

water if level is low.

Brake System• Brake system –used to slow or stop the vehicle in motion.• How?• Proper fluid level, it must be at maximum level.• Brake lines and Fluid must have no leakage ay any point of

connections.• Brake shoes are properly adjusted.• Hydrobox and vacuum hose must be in good condition and properly

fitted.• Rubber caps must be in good condition.• Brake drum surface must in good condition. • Used DOT 3 Brake fluid and must not be contaminated from any

petroleum products or other liquids.

Lighting, Warning Systems• Lightings- used to illuminate the area ahead of the vehicle

respectively.• Warnings should indicate properly and respectively.• Oil indicator light should indicate when the ignition switch is

ON and OFF when the engine is running already.• Charging light indicator – should indicate when the ignition

switch in ON and OFF when the engine is running already.• Temperature gauge must be in good condition.• Wipers and other accessories must be in good condition.

TIRES

AIR PRESSURE NG MGA GULONG:PAGPAPANATILI NG TAMANG AIR PRESSURE SA

MGA GULONG:

MATAAS

KONSUMONG KRUDO

MABABA

3.2 km/l 3.0 km/l 2.8 km/l

TAMANG PRESSURE

10 % MAS MABABA

30% MAS MABABA

4%

12%

A: Ang pressure ng gulong ay nasa “standard settings”.

B: Ang pressure ng gulong ay mas mababa ng sampungporsyiento (10%) kaysa sa standard settings.

C: Ang “pressure” ng gulong ay mas mababa ng tatlumpongporsyiento (30% kaysa sa standard settings”.

Kung ang “pressure” ng gulong ay mas mababa ngsampung porsyiento kaysa sa “standard setting”, angkunsumo ng krudo ay tumaas ng hanggang apat naporsyiento. At kapag ang “pressure” naman ay bumaba nghanggang tatlumpong porsyiento kaysa sa “standard pressure”, ang pagtaas naman sa kunsumo ng krudo ayaabot ng hanggang labindalawang porsyiento.

K ULANG ANG“AIR PRESSURE”

MAGK AK AROONNG

“SHOULDER WEAR”

Ito ay dahil mas lumalapad ang parte ng gulongna lumalapat sa kalsada kapag ito ay kulang sa hangin,Dahil dito ay mas lumalaki ang “roling friction”.

TOE – IN The front wheel are

closer together than the back wheels.

Excessive toe-incauses rapid wear on the outside shoulderof the tire. Set as close to zero as

vehicle manufacturer’srecommendations allowIn loaded condition

Camber

• Camber- tilting top of the wheel from viewed vertically.

• Positive camber- when top of the wheel is tilting outward.

• Negative camber – when top of the wheel is tilting inward.

Clutch

• Clutch- is used to engage and disengage the power from engine through transmission.

• It is used to used temporarily uncouple the engine and transmission so that gears can be shifted.

• HOW?• Hydraulic clutch must properly adjusted.• And has no any means of leakage.• Clutch disc must be in good condition as well as the

clutch pressure plate so that it can transfer power without slipping, accurately, quickly and entirely.

Manual Tranmission

• It is an assembly of gears needed to move the vehicle under a variety of load and road condition.

• Gear oil must be in proper level.• It is advisable to change gear twice a year.• Use SAE 9O for light duty vehicle• Use SAE 140 for heavy duty vehicle.• It should has no leakage.

PASSENGER MINI BUS / BUS / PUJFOR HIRE VEHICLE

THANK YOU AND GOOD MORNING

• AND GOOD LUCK!