UD TRUCK MAINTENANCE SCHEDULE
MEDIUM DUTY

Abbreviations:

R = Replace RB = Rebuild A=Adjust C = Cleaning L = Lubricate

T= Tighten to specified torque E = Emission Control System Maintenance I = Inspect. Correct, adjust or replace if necessary. [ ] = Initial Maintenance. Items indicated by an asterisks (*) should only be performed by UD dealer.

	Miles x 1000	2.5	5	10	15	20	25	30
	Kilometers x 1000	4	8	16	24	32	40	48
	Months	1	2	4	6	8	10	12
BASIC MECHANICAL SYSTEM
E *Valve clearance								A
*Intake manifold			I	I	I	I	I	I
*Exhaust manifold			I	I	I	I	I	I
*Crank damper		I: Every 24 Months
*Cvlinder Compression Pressure		I: Every 50,000 Miles
COOLING SYSTEM
Radiator								I
*Fan clutch								I
Cooling Fan and Shroud								I
*Thermostat								I
FUEL SYSTEM
E Governor setting (checking seals)					I			I
E *Injection pump timing		I: Every 50,000 Miles
E *Idle speed								I
*Acceleration and deceleration								I
Accelerator linkage								I
E *Nozzle (injector tip)		C: Every 50,000 Miles
E *Nozzle holder (injector)		RB: Every 150,000 Miles
Fuel tubing								I
RE Fuel filter (cartridge)								R
Fuel tank(s).		Check whenever draining water from sedimentor
INTAKE AND EXHAUST SYSTEM
E Air cleaner element			I	I	I	I	I	R
E Air intake system (Duct, hose & clamp)			I	I	I	I	I	I
Exhaust tubing and muffler			[ I ]					I
E *Turbocharger		C: Every 150,000 Miles
OTHER
*Alternator								I
*Starting motor								I
CLUTCH
Clutch pedal play				I		I		I
*Clutch disc				I		I		I
*Clutch piping								I
MANUAL TRANSMISSION
*Breather								I
AUTOMATIC TRANSMISSION
External oil filter		On-Highway: Change fluid every 25,000 miles (40,000 km) or 12 months, whichever first occurs. Change internal sump oil filter at each fluid change. Change external oil filter at first 5,000 miles (8,000 km), thereafter at each fluid change.
Fluid
Internal sump oil filter
PROPELLER SHAFT
*Sliding shaft								I
*Universal joint								I
*Center bearing								I
*Condition of propeller shaft					T			T
STEERING SYSTEM
*Gear box					T			T
Steering wheel free play				I		I		I
*Steering linkage				T		T		T
AXLE AND WHEEL
*Front axle (I-beam)								I
*Clearance between front axle & knuckle								I
*Kingpin cotter pin								T
*Wheel alignment								I
*Rear axle housing								I
*Breather								I
*Front wheel bearing					I			I
*Rear wheel bearing					I			I
Wheel nut (Refer to note)			I	I	I	I	I	I
NOTE: Perform maintenance after first 1,000 miles (1,600 km) of operation. This procedure also applies whenever a tire is re laced.
BRAKE SYSTEM
*Service brake valve								I
Air dryer			I	I	I	I	I	I
*Air dryer repair kit		R: Every 12 months
*Air compressor & air pressure governor								I
*Brake piping								I
*Brake hose		R: Every 12 months
*Air booster repair kit		R: Every 12 months
*Wheel cylinder repair kit		R: Every 12 months
*Brake lining clearance (note 1)		I: Every 2,500 miles or 1 month
*Brake lining				I		I		I
*Brake drum								I
*Parking brake lever stroke (note 2)			I	I	I	I	I	I
*Parking brake lining clearance (note 2)					I			I
*Parking brake lining (note 2)								I
*Parking brake drum (note 2)								I
*Parking brake system (note 3)								I
*Parking brake chamber diaphragm (note 3)		R: Every 12 months
SUSPENSION
Leaf spring			I	I	I	I	I	I
Shock absorber				I		I		I
*U-bolt and nut		[ T ]			I			I
ELECTRICAL SYSTEM
Battery electrolyte level					I			I
Battery terminal			I	I	I	I	I	I
Specific gravity of electrolyte					I			I
OTHER
*Acoustical shielding								I
ENGINE
E Engine oil and oil filter (95 Model Year and newer)*				R		R		R
Engine coolant								R
		* '94MY and older - refer to owners manual
CHASSIS
Clutch fluid					I			R
Manual transmission oil gear		[ R ]						R
Power steering system fluid and filter		[ R ]*		I		I		R*
Differential  gear oil		[ R ]						R
*Front wheel bearing grease								R
*Rear wheel bearing grease								R
Brake fluid					I			R*
Grease lubrication points		L: Every 5,000 miles or I month
		*Whichever first occurs.
NOTES:
During periods of severe service operation or frequent stop-and-go operation, more frequent inspections of the brake system should be performed. Mechanical driveline parking brake. Spring-activated rear wheel parking brake. Under the following severe operating conditions, more frequent servicing will be required. Operation at extremely low or high ambient temperature. Operation in heavy dust conditions. Extended high speed operation with vehicle fully- loaded to its GVWR. Extended low speed operation. Frequent stop-and-go operation. Any replacement parts used for required maintenance service or repairs should be genuine UD parts.