1 General Information

The intervals of preventive maintenance in Tab. 5.1, Tab. 5.2, Tab. 5.3 and Tab. 5.4 refer to the engine operating under normal operating conditions with fuel and oil meeting the recommended specifications.

5.1

CLEANING AND CHECKING
OPERATION DESCRIPTION	PERIOD (HOURS)
OPERATION DESCRIPTION	100	250	500	5000
Engine oil level^{(4) (8)}
Coolant level^{(8) (9)}
Cartridge dry-type air filter⁽²⁾
Radiator heat-exchange surface and Intercooler^{(2) (8)}
Standard alternator belt⁽⁸⁾
Poly-V alternator belt⁽⁸⁾
Rubber components
Starter Motor⁽⁶⁾
Alternator⁽⁶⁾

5.2

REPLACEMENT
OPERATION DESCRIPTION		PERIOD (HOURS)
OPERATION DESCRIPTION		500	2000	5000
Cartridge dry-type air filter ⁽²⁾
Intake manifold hose (air filter - intake manifold) ^{(6) (7)}
Coolant hoses ^{(6) (7)}
Fuel line hose ^{(6) (7)}
Delta-P > DPF pipes ⁽⁶⁾
Alternator belt	Standard alternator belt (trapezoidal) ^{(3) (6)}
	Poly-V belt heavy environmental condition ⁽⁶⁾
	Poly-V belt standard condition ⁽⁶⁾
Coolant	OAT ⁽⁶⁾
Coolant	HOAT ^(6)(10)
ATS ⁽⁶⁾		ECU request (message or warning light activation) refer to the machine documentation

5.3

ENGINE OIL AND OIL FILTER CARTRIDGE REPLACEMENT
ENGINE VERSION	PERIOD (HOURS) - 6.1 - 6.2 - 6.3
ENGINE VERSION	250	500
KDI TCR Tier 4 final – Stage IIIB – Stage IV- Stage V⁽¹⁾
KDI TCR/D Tier 3 – Stage IIIA^{(1) (11)}
KDI TCR/D uncertified ⁽¹⁾

5.4

FUEL FILTER AND PREFILTER CARTRIDGE REPLACEMENT
ENGINE VERSION	PERIOD (HOURS) - 6.4
ENGINE VERSION	250	500
KDI TCR Tier 4 final – Stage IIIB – Stage IV- Stage V⁽¹⁾
KDI TCR/D Tier 3 – Stage IIIA⁽¹⁾
KDI TCR/D uncertified ⁽¹⁾

(1) - In case of low use: 12 months.
(2) - The period of time that must elapse before checking the filter element depends on the environment in which the engine operates. The air filter must be cleaned and replaced more frequently under very dusty conditions.
(3) - In case of low use: 36 months.

(4) - The inspection must be carried out every 50 hours or every week in engines with an ATS system (see Par. 1.6).
(6) - Contact authorized KOHLER workshops.

(7) - The replacement interval is only an indication, it strongly depends from environmental condition and hose status detected during regular visual inspection.

(8) - The first check must be done after 10 hours.

(9) - Test the coolant condition annually with coolant test strips.

(10) - It is recommended to have SCA (Supplemental Coolant Additives) added at the first maintenance interval.

(11) - Read Cap. 2.5, "KDI De- Contented Electronic Injection Tier 3 – Stage IIIA emission equivalent certified Engines (EGR engines)" and "KDI De- Contented Electronic Injection Uncertified Engines (no EGR engines)".