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John Deere 4045HF285K Engine

The John Deere 4045HF285K is a 4.5 L 4-cylinder turbocharged, charge air-cooled engine rated at 1800 rpm, producing up to 147 kW. It powers generator sets from Kohler, including the 125REOZJG. It holds 13.9 L (3.7 gal) of oil and 19.2 L (5.1 gal) of coolant.

Also known as: John Deere 4045HF285K

Part of the John Deere 4045 engine family — 118 variants share parts & fitment.

4.5 L

Displacement

Cylinders

1800 rpm

Rated speed

147 kW

Gross power

On this pageService parts Specs Generator sets Maintenance Filter cross-reference FAQ Torque & specs Procedures Wiring

Service parts for the 4045HF285K

The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.

Air intake

1 required

AL204809Air filterfind

Fuel system

1 required

GM50006Fuel filter (primary)$26.99eBay

Oil system

1 required

GM32809Oil filter$26.25eBay

Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.

Engine specifications

Oil capacity	13.9 L
Coolant capacity	19.2 L
Displacement	4.5 L
Cylinders	4
Aspiration	Turbocharged, Charge Air-Cooled
Rated speed	1800 rpm
Gross power	147 kW

Generator sets powered by this engine

Kohler 125REOZJG

How to read your John Deere engine serial & model number →

Common problems

Emergency Stop 32A
Fix: Reset the emergency stop switch.
Pre Low Oil Pressure 41
Fix: Check and adjust oil level or replace oil pump.
Pre High Coolant Temp. 40
Low Fuel 63
Fix: Refuel the generator set.
Low Battery Volts 62
High Coolant Temperature 32

Compiled from service & troubleshooting documentation across every generator set that uses the John Deere 4045HF285K.

Maintenance schedule

Item	Spec	Part #
Air filter	Dry	—
Fuel filter	Secondary	GM50006	Amazon eBay $26.99 NAPA $44.17
Oil filter	Cartridge	GM32809	Amazon Amazon Amazon Amazon eBay $26.25 NAPA $28.76

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service specifications

Type	Item	Value	Unit	Condition
Gap	Speed sensor air gap	0.36- 0.71	mm
Other	10 in. weld flange bolt circle diameter B	361.95	mm (14.25 in.)
Other	10 in. weld flange outside diameter C	406.4	mm (16.0 in.)
Other	10 in. weld flange quantity of bolts / bolt hole diameter D	12, 25.40	mm (1.00 in.)
Other	12 in. weld flange bolt circle diameter B	431.80	mm (17.00 in.)
Other	12 in. weld flange outside diameter C	482.6	mm (19.0 in.)
Other	12 in. weld flange quantity of bolts / bolt hole diameter D	12, 25.40	mm (1.00 in.)
Other	14 in. weld flange bolt circle diameter B	476.25	mm (18.75 in.)
Other	14 in. weld flange outside diameter C	533.4	mm (21.0 in.)
Other	14 in. weld flange quantity of bolts / bolt hole diameter D	12, 28.58	mm (1.13 in.)
Other	16 in. weld flange bolt circle diameter B	539.75	mm (21.25 in.)
Other	16 in. weld flange outside diameter C	596.9	mm (23.5 in.)
Other	16 in. weld flange quantity of bolts / bolt hole diameter D	16, 28.58	mm (1.13 in.)
Other	18 in. weld flange bolt circle diameter B	577.85	mm (22.75 in.)
Other	18 in. weld flange outside diameter C	635.0	mm (25.0 in.)
Other	18 in. weld flange quantity of bolts / bolt hole diameter D	16, 31.75	mm (1.25 in.)
Other	20 in. weld flange bolt circle diameter B	635.00	mm (25.00 in.)
Other	20 in. weld flange outside diameter C	698.5	mm (27.5 in.)
Other	20 in. weld flange quantity of bolts / bolt hole diameter D	20, 31.75	mm (1.25 in.)
Other	5 in. weld flange bolt circle diameter B	215.90	mm (8.50 in.)
Other	5 in. weld flange outside diameter C	241.30	mm (9.50 in.)
Other	5 in. weld flange quantity of bolts / bolt hole diameter D	8, 22.23	mm (0.88 in.)
Other	6 in. weld flange bolt circle diameter B	254.0	mm (10.0 in.)
Other	6 in. weld flange outside diameter C	279.4	mm (11.0 in.)
Other	6 in. weld flange quantity of bolts / bolt hole diameter D	8, 22.23	mm (0.88 in.)
Other	8 in. weld flange bolt circle diameter B	298.45	mm (11.75 in.)
Other	8 in. weld flange outside diameter C	342.9	mm (13.5 in.)
Other	8 in. weld flange quantity of bolts / bolt hole diameter D	8, 22.23	mm (0.88 in.)
Other	Weld flange angle A (10, 12, 14 in. nominal pipe size)	30	deg.
Other	Weld flange angle A (16, 18, 20 in. nominal pipe size)	22.5	deg.
Other	Weld flange angle A (5, 6, 8 in. nominal pipe size)	45	deg.
Pressure	Battery equalizer input voltage (24 volts nominal)	20- 35	volts
Pressure	Battery equalizer output voltage	(input voltage/2) ±2%	volts
Pressure	Pressure switch 364345	483 ±14	kPa
Resistance	Pressure sender 264390 value A	240 +17/- 15	ohms at 0 psi
Resistance	Pressure sender 264390 value B	153 +12/- 15	ohms at 25 psi
Resistance	Pressure sender 264390 value C	33.5	ohms at 100 psi
Resistance	Pressure sender 365624 value A	241 ±16	ohms at 0 psi
Resistance	Pressure sender 365624 value B	152 ±13	ohms at 50 psi
Resistance	Pressure sender 365624 value C	33.5	ohms at 200 psi
Resistance	Temperature sender 226717 value A	123.8 +7.2/- 7.8	ohms at 90.6 C (195 F)
Resistance	Temperature sender 226717 value B	35.6 +3.4/- 3.6	ohms at 137.8 C (280 F)
Resistance	Temperature sender 226919 value A	942 ±22	ohms at 37.7 C (100 F)
Resistance	Temperature sender 226919 value B	35	ohms at 115.6 C (240 F)
Speed	Overspeed shutdown	70	Hz	60 Hz models
Temperature	Battery equalizer operating temperature	- 40 to 71	C (- 40 F to 160 F)
Temperature	Temperature switch 241308	107 ±4	C (225 F ±7 F)	normally open to close on temp. rise
Temperature	Temperature switch 290090/GM51705	16 ±3	C (60 F ±5 F)	normally open to close on temp. fall
Voltage	Speed sensor voltage, wire 2 (black) & 16 (white)	3- 6	volts DC
Voltage	Speed sensor voltage, wire 2 (black) & 24 (red)	8- 10	volts DC

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Overfrequency Adjustment (Over/Underfrequency Relay, Decision-Maker 3+) adjustment

Turn the overfrequency adjustment potentiometer fully clockwise (CW).
Place master switch in RUN to start the generator set.
Adjust governor per engine operation manual, engine service manual, or governor section of this manual.
Slowly turn overfrequency potentiometer counterclockwise (CCW) until the LED starts flashing; after about 10 seconds the set shuts down on auxiliary fault.
Place master switch to OFF/RESET to reset the controller.
Place master switch to RUN to start the generator set.
Readjust the governor to the desired frequency as required.
Place master switch to OFF/RESET to stop the generator set.

Overvoltage Feature Testing and Adjustment (Decision-Maker 3+) adjustment

⚠ Hazardous voltage. Moving parts. Will cause severe injury or death. Operate the generator set only when all guards and electrical enclosures are in place.

⚠ Disconnecting the electrical load. Hazardous voltage will cause severe injury or death.

Disconnect generator set from load by opening line circuit breaker or disconnecting and taping output leads.
Determine overvoltage shutdown value based on user requirement; factory setting is 15% above nominal line-to-neutral voltage.
Remove the controller cover.
Place master switch in RUN to start the generator set.
Observe AC voltmeter; turn voltage adjustment potentiometer CW until generator set shuts down.
If the shutdown point is correct, go to step 12; otherwise continue.
Turn controller circuit board R42 adjustment potentiometer fully CW.
Place master switch to OFF/RESET to reset; then to RUN to start.
Observe AC voltmeter while turning voltage adjustment potentiometer to desired overvoltage shutdown point.
Turn R42 adjustment potentiometer slowly CCW until the generator set shuts down.
Turn controller voltage adjustment potentiometer slightly CCW.
Place master switch OFF/RESET then RUN to start; adjust for correct voltage and phase.
Place master switch OFF/RESET to stop.
Disconnect battery negative lead first; reconnect generator set to load; reconnect battery negative lead last.

Reactive Droop Compensator Adjustment Procedure adjustment

Tools: Voltmeter, Wattmeter

Remove any load; start each generator set with master switch in RUN.
Set reactive droop compensator rheostat on generator set no. 1 to minimum CCW; record rpm/frequency and voltage at 1/4 load steps to full load.
Repeat for generator set no. 2.
Compare readings; adjust voltage within 1 volt and speed within 3 rpm (or 0.1 Hz) at each load step.
Check droop compensation on each unit with an inductive load 1/2 to full load.
Adjust rheostat to approximately 4% below rated voltage at full load.
Repeat for unit no. 2.

Reactive Droop Compensator Alternate Adjustment Procedure adjustment

Tools: Voltmeter

Turn reactive droop compensator rheostat on generator set no. 1 to minimum setting.
Remove controller cover; move voltage sensing lead from V7 to V9 at the AC fuse terminal block.
Remove any load connected to the generator set.
Start the generator set with master switch in RUN.
Use controller or remote voltage adjusting potentiometer to fine adjust voltage.
Apply resistive load (1.0 power factor) until reaching rated current.
Adjust reactive droop compensator rheostat to achieve a 4% droop in voltage.
Remove the resistive load and stop the generator set.
Return voltage sensing lead from V9 to V7 at the AC fuse terminal block.
Replace the controller cover and repeat for generator set no. 2.

Underfrequency Adjustment (Over/Underfrequency Relay, Decision-Maker 3+) adjustment

Turn underfrequency adjustment potentiometer fully clockwise (CW).
Place master switch in RUN to start the generator set.
Adjust governor per engine operation manual, engine service manual, or governor section of this manual.
Slowly turn underfrequency potentiometer counterclockwise (CCW) until LED starts flashing; after about 10 seconds the set shuts down on auxiliary fault.
Place master switch to OFF/RESET to reset the controller.
Place master switch to RUN to start the generator set.
Readjust the governor to the desired frequency as required.
Place master switch to OFF/RESET to stop the generator set.

2-Wire Low Water Level Sender Test diagnostic

⚠ Hot engine and exhaust system can cause severe injury or death. Do not work on the generator set until it cools.

⚠ Hazardous voltage. Moving parts. Will cause severe injury or death. Operate the generator set only when all guards and electrical enclosures are in place.

Tools: DC voltmeter

Measure DC voltage between lead 31A (+) and ground (- ) with sender submerged in coolant; voltmeter indicates approximately 12.5 VDC.
Measure DC voltage between lead 31A (+) and ground (- ) with sender removed from coolant for at least 5-15 seconds; voltmeter indicates a drop to approximately 7 VDC.

3-Wire Low Water Level Sender Test diagnostic

⚠ Hot engine and exhaust system can cause severe injury or death. Do not work on the generator set until it cools.

⚠ Hazardous voltage. Moving parts. Will cause severe injury or death.

Tools: Ohmmeter

Measure resistance between lead 31 and ground with sender submerged in coolant; ohmmeter indicates a high resistance reading.
Measure resistance between lead 31 and ground with sender removed from coolant for at least 5-15 seconds; ohmmeter indicates a low resistance reading.

Battery Equalizer Troubleshooting diagnostic

⚠ To prevent reverse polarity damage to the battery equalizer, remove the ground (GND) connection first and attach the ground connection last when disconnecting the battery equalizer.

Tools: 12-volt test light with alligator clips, Voltmeter with 0.01 volt resolution, Battery load tester

Remove the ground (GND) connections from the battery equalizer; do not allow contact with other connections.
Verify a differential of 12 volts between the +12 volt and +24 volt terminals using a 12-volt test light; the light will illuminate on a functional unit. Remove the test light.
Connect the test light between the +12 volt and GND terminals; the light will illuminate on a functional unit.
With the test light connected, measure and record the voltage between the +12 volt and +24 volt terminals.
With the test light connected, measure and record the voltage between the +12 volt and GND terminals.
Remove the test light.
Compare the values from steps 4 and 5; the difference should be - 0.5 and +0.13 volts on a functional unit.

Oil Pressure Sender Testing diagnostic

Tools: Ohmmeter, Mechanical oil pressure gauge

Disconnect the oil pressure sender lead 7C.
Check the sender resistance with an ohmmeter.
Compare resistance values when the generator set is shut down and when running at operating temperature to Section 1, Specifications.
Use a mechanical oil pressure gauge to further verify correct readings.

Overcrank Test (Typical) diagnostic

On gas-fueled sets, disconnect the coil wire at the distributor cap and ground it or disconnect the ignition system.
On diesel-fueled sets, unplug the fuel injector harness from ECM or disconnect wire no. 70 from the injector pump solenoid.
Place unit in RUN mode; observe 15-second on-off cranking cycles and maximum 75-second elapsed time to overcrank shutdown.
Observe controller fault lamp and display for an overcrank shutdown.
Place unit in OFF/RESET mode.
Reconnect the ignition coil wire/ignition system, or reconnect the fuel injector harness/wire no. 70.

Speed Sensor Test with Generator Set Running diagnostic

⚠ Keep leads connected to the speed sensor terminals during the test; do not disconnect the leads.

Tools: DC voltmeter

Connect a DC voltmeter between positive (+) lead (wire 24) at the speed sensor and ground (wire 2) with master switch OFF/RESET; read approximately 8- 12 volts DC.
Place master switch in RUN to start the generator set.
Connect DC voltmeter negative probe to 0 terminal (wire 16 white) and positive probe to positive (+) terminal (wire 24 red); read approximately 7- 12 volts DC.
Place master switch in OFF/RESET to stop the generator set.
If sensor emits a signal, check continuity of speed sensor leads (wires 2, 16, 24) between controller P1 connector and sensor terminals.

Speed Sensor Test with Separate 12 VDC Source diagnostic

Tools: DC voltmeter, 12-volt battery or DC power supply, Flat piece of iron or steel

Place master switch in OFF/RESET position.
Disconnect the speed sensor leads.
Connect speed sensor, DC voltmeter, and DC voltage source as shown.
Touch sensing surface with a flat piece of iron or steel at least 4.1 cm (1/4 cu. in.) in size.
DC voltmeter reading should equal the source voltage, approximately 12 VDC.
Remove the iron or steel piece and observe a voltmeter reading of 0 VDC.
If the sensor passes, it is functional; replace if it fails.
Connect the speed sensor leads and adjust the air gap.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
		12-lead optional voltage connections	12	Alternator optional feature
		4-lead dedicated voltages	4	Alternator standard feature
110/127/139/240/254/277	single-phase	switchable		Towable generator model specifications; some models n/a
208/220/240/415/440/480	3-phase	reconnectable		Towable generator model specifications
208/220/240/415/440/480	3-phase	switchable		Towable generator model specifications

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Parts cataloged across the John Deere 4045 family

300

Part #	Description	Category
10-20-08	Net engine power is with standard equipment including air cleaner, exhaust system, alternator, and cooling fan at test conditions specified per ISO9249 No derating is required up to 5,000-ft. (1500 m) altitude.	Air filter
100-001	Air Filter	Air filter
100-025	Air Filter	Air filter
24-20001	Air Filter	Air filter
24-20018	Crankcase Breather Filter, Right hand	Air filter
24-21000	Air Filter	Air filter
24-21003	Air Filter	Air filter
24-21406	Air Filter	Air filter
25-1476	Air Filter Minders	Air filter
25-1483	Primary Air Cleaners	Air filter
253108	Element, air cleaner	Air filter
29765	Filter, air	Air filter
301315	Air Filter Element for Compressor	Air filter
30561	Element, air filter	Air filter
30562	Element, air filter safety	Air filter
35393651	Air Cleaner Element (Compressor) secondary - optional	Air filter
35393685	Air Cleaner Element (Compressor) primary	Air filter
AR79679	Air Filter	Air filter
AR79680	Filter Element	Air filter
AT203469	Outer Element	Air filter
AT203470	Inner Element	Air filter
AT203471	Air Filter Assembly (Includes Keys #1-7)	Air filter
DZi05100	CRANKCASE VENT SYSTEM OCV FILTER	Air filter
F1000000001	Air Filter	Air filter
G030070	Air Cleaner Element (Engine) Primary	Air filter
G030071	Air Cleaner Element (Engine) Secondary	Air filter
G030073	Air Cleaner Element (Engine) Primary	Air filter
G030074	Air Cleaner Element (Engine) Secondary	Air filter
G030077	Air Cleaner Element (Engine) Primary	Air filter
G030078	Air Cleaner Element (Engine) Secondary	Air filter
G30070	Air Cleaner Element (Engine) Primary	Air filter
GM100703	Element, Primary	Air filter
GM100704	Element, Safety	Air filter
GM94203	Heavy Duty Air Cleaner	Air filter
P-130D-001	Air Filter	Air filter
RE554812	Filter Element	Air filter
22-49441	12V/75A Alternator Standard Ground	Alternator
22-49578	Alternator 14 Volt 75 Amp Standard Ground (includes keys 2-3)	Alternator
22-4958	Alternator 28 Volt 50 Amp Standard Ground	Alternator
22-49584	Alternator 28 Volt 50 Amp Isolated	Alternator
22-49586	Alternator 50 Amp Standard Ground	Alternator
22-49587	Alternator 14 Volt / 75 Amp Isolated Ground (includes keys #8-9)	Alternator
32910	Alternator, engine	Alternator
AH137883	ALTERNATOR (12V, 95A)	Alternator
AH165975	ALTERNATOR	Alternator
AT173624	Alternator 12 Volt 65 Amp	Alternator
AT387574	ALTERNATOR	Alternator
DZ123153	ALTERNATOR	Alternator
RE509080	ALTERNATOR (12V, DENSO)	Alternator
RE533516	ALTERNATOR	Alternator
RE533653	ALTERNATOR	Alternator
RE533654	ALTERNATOR	Alternator
RE537146	ALTERNATOR (28V, 50A) (3142)	Alternator
RE537508	ALTERNATOR	Alternator
RE540412	ALTERNATOR (14V, 75A) (3148)	Alternator
RE540413	ALTERNATOR (28V, 50A) (3149)	Alternator
RE554472	(12V, 200A) (31AR)	Alternator
RE555751	ALTERNATOR	Alternator
RE558675	ALTERNATOR	Alternator
RE558676	ALTERNATOR	Alternator
RE558678	ALTERNATOR	Alternator
RES58675	ALTERNATOR (24V, 60A)	Alternator
RM100225	ALTERNATOR (REMAN FOR RE537146) (24 V, 50 A) (3104)	Alternator
SE501342	ALTERNATOR (REMAN FOR AH137883) (12V, 95A)	Alternator
SE501343	ALTERNATOR (REMAN FOR AH165975) (12V, 120A) (3103)	Alternator
SE501838	ALTERNATOR (REMAN FOR AT387574) (24V, 100A) (3152)	Alternator
SE502561	ALTERNATOR (REMAN FOR RE537508)	Alternator
SE502563	ALTERNATOR	Alternator
SE502626	ALTERNATOR (REMAN FOR RE533516) (12V, 75A) (3138)	Alternator
SE502627	ALTERNATOR (REMAN FOR RE533653) (12V, 95A) (3140)	Alternator
SE502628	ALTERNATOR (REMAN FOR RE533654) (12V, 120A) (3141)	Alternator
TY24322	Alternator 24V/45 Amp	Alternator
RE536402	SHORT BLOCK ASSEMBLY	Assembly
H144094	Voltage Regulator	Avr
RE533942	Regulator	Avr
RE567824	Regulator (Not Shown)	Avr
DKA344JES	Baterías estándar (2), 12 V con 1700 A para arranque en frío, reserva nominal de 176 minutos	Battery
100-024	Belt	Belt
100-085	Belt	Belt
33005	Belt, fan/alternator	Belt
40-09504	Drive Belt, Poly-V 28 mm x 1523 mm	Belt
DZ112758	(LGTH=1565 mm) (24GY)	Belt
DZ115812	FAN BELT (LGTH = 1680 mm)	Belt
DZ117268	FAN BELT (LGTH = 1530 mm)	Belt
DZ118265	FAN BELT	Belt
DZ118558	FAN BELT	Belt
DZ118559	FAN BELT	Belt
DZ118560	FAN BELT	Belt
DZ118562	FAN BELT	Belt
DZ118563	FAN BELT	Belt
DZ118564	FAN BELT	Belt
DZ118606	FAN BELT	Belt
DZ118648	FAN BELT	Belt
DZ118649	FAN BELT	Belt
DZ118650	FAN BELT	Belt
DZ118652	FAN BELT	Belt
DZ118654	FAN BELT	Belt
DZ118768	(LGTH=1535 mm) (24GR)	Belt
DZ119014	(LGTH=2335 mm) (24HL)	Belt
DZ119059	FAN BELT	Belt
DZ119060	FAN BELT (LGTH = 1555 mm)	Belt
DZ119061	FAN BELT (LGTH = 1540 mm)	Belt
DZ119385	FAN BELT (LGTH = 1650 mm)	Belt
DZ119477	FAN BELT (LGTH = 1565 mm)	Belt
DZ119478	FAN BELT (LGTH = 1570 mm)	Belt
DZ119515	FAN BELT	Belt
DZ119522	FAN BELT	Belt
DZ119530	FAN BELT (LGTH = 1675 mm)	Belt
DZ119970	(LGTH=1550 mm) (24HA)	Belt
DZ124645	FAN BELT	Belt
F1000000005	Belt	Belt
GM66704-1	Fan Belt (12V)	Belt
GM66704-2	Fan Belt (24V)	Belt
JDG1341	Belt Tension Gauge	Belt
JDG1520	Belt Tension Tool (alternate method for engines without auxiliary drive)	Belt
R123439	Drive Belt, LP-MP445D (non-turbo)	Belt
R123440	Drive Belt, LP-M445T-H (with turbo)	Belt
R123451	Drive Belt, M1064H, NL1064H1 (with turbo - all)	Belt
R123454	Drive Belt, NL668T2 (with turbo)	Belt
R123457	Drive Belt LP-MP668T-H (with turbo, formerly #R123464)	Belt
R123461	Drive Belt, L-M-NL1064D (non-turbo)	Belt
R123462	Drive Belt, NL445T1-T2 (with turbo)	Belt
R123463	Drive Belt, NL445D1 (non-turbo)	Belt
R500277	FAN BELT	Belt
R523124	V-Belt	Belt
R524006	V-Belt	Belt
R525434	FAN BELT (LGTH = 2180 mm)	Belt
R525435	FAN BELT (LGTH = 2190 mm)	Belt
R533596	FAN BELT	Belt
RE518097	Belt Tensioner	Belt
RE70536	Belt Tensioner	Belt
T428692	FAN BELT (LGTH = 1665 mm)	Belt
T428712	(LGTH=2400 mm) (24GS)	Belt
T428820	FAN BELT (LGTH = 1580 mm)	Belt
T428825	FAN BELT	Belt
T429109	FAN BELT (LGTH = 1660 mm)	Belt
SE501794	COMPLETE BLOCK ASSEMBLY (without auxilary drive may not be as illustrated. Includes cylinder head with valves and rocker arm assembly, balancer shafts, oil pump assembly, complete gasket kit with front and rear seals)	Block assembly reman
SE501795	COMPLETE BLOCK ASSEMBLY (auxiliary drive may not be as illustrated. Includes cylinder head with valves and rocker arm assembly, balancer shafts, oil pump assembly, complete gasket kit with front and rear seals)	Block assembly reman
SE503065	AC COMPRESSOR (REMAN FOR AH169875) (12V, 10PA) (7427, 7414)	Compressor
F100-570	CONTROL BOX ASSEMBLY	Control box
SE502802	CONTROLLER (REMAN FOR RE526588) (24V/12V, LEVEL 16) (16A5)	Controller
100-037	Coolant Filter	Coolant filter
100-060	Coolant Filter	Coolant filter
F1000000004	Coolant Filter	Coolant filter
5070M	Engine	Engine
5080G	Engine	Engine
5080M	Engine	Engine
5080R	Engine	Engine
5090G	Engine	Engine
5090M	Engine	Engine
5090R	Engine	Engine
5100M	Engine	Engine
5100R	Engine	Engine
M-RE527298	Engine Overhaul Non-Cert, T1, T2	Engine
M-RE527299	Engine Overhaul Non-Cert, T1, T2	Engine
R116466	Bushing	Engine
R119874	Bushing	Engine
R132518	Plate	Engine
R26650	Dowel Pin	Engine
R48685	Dowel Pin	Engine
RE508185	Drain Plug	Engine
T18891	Plug	Engine
F100-790	ENGINE OPERATING PANEL ASSEMBLY	Engine operating panel
F100-680	ENGINE & RADIATOR ASSEMBLY	Engine radiator
20-00002	Pint - Part Number...............20-00002	Fluid
20-00003	1/2 gallon - Part Number.....20-00003	Fluid
22252050	IR XHP605 55 Gal. (208 litres)	Fluid
22252068	IR XHP605 220 Gal. (836 litres)	Fluid
22252076	IR XHP605 compressor fluid, 5 gal. (19.0 Litre)	Fluid
22252100	XHP405 55 Gal. (208 litres)	Fluid
22252118	IR XHP1001 220 Gal. (836 litres)	Fluid
22252126	IR XHP405 compressor fluid, 5 gal. (19.0 Litre)	Fluid
24952	Jug, overflow 2.5 qt	Fluid
35300516	IR XHP1001 55 Gal. (208 litres)	Fluid
35612738	IR XHP1001 compressor fluid, 5 gal. (19.0 Litre)	Fluid
36866903	Engine Oil (55 gal)	Fluid
36875938	Engine Oil (5 gal)	Fluid
36899698	IR Pro-Tec 1 gal. (3.8 litre)	Fluid
36899706	IR Pro-Tec 5 Gal. (19.0 litres)	Fluid
36899714	IR Pro-Tec 55 Gal. (208 litres)	Fluid
36899722	IR Pro-Tec 220 Gal. (836 litres)	Fluid
54480918	Engine Oil, 1 gal. (3.8 Litre)	Fluid
G122208	Clarke Eng Fluid - 5 gal	Fluid
G122209	Clarke Eng Fluid -1 gal	Fluid
PT507	John Deere Multi-Purpose Grease	Fluid
TY22041	John Deere ENGINE BREAK-IN OIL (SAE 10W-30)	Fluid
TY6333	JD Moly High Temp Grease	Fluid
100-026	Fuel Filter	Fuel filter
100-045	Fuel Filter	Fuel filter
24-51003	Fuel Filter without Drain Valve	Fuel filter
24-51004	Fuel Filter with Plastic Drain Valve	Fuel filter
24-51005	Fuel Filter with Metal Drain Valve	Fuel filter
24-52259	Fuel filter	Fuel filter
25-1639	Fuel Filters	Fuel filter
26379	Vent, plastic fuel 1.00 ID	Fuel filter
29877	Heater, fuel filter	Fuel filter
32911	Filter, fuel - primary and secondary	Fuel filter
33023	Filter, fuel - final	Fuel filter
33024	Filter, fuel - primary	Fuel filter
36534659	Engine Fuel Filter Element	Fuel filter
65631	Gauge, fuel - elec w/light	Fuel filter
CO2775	Element, Fuel Water Separator	Fuel filter
CO2776	Element, Fuel Filter Primary	Fuel filter
DZ115390	SECONDARY FUEL FILTER	Fuel filter
DZ115391	PRIMARY FUEL FILTER	Fuel filter
DZ128543	PRIMARY FUEL FILTER	Fuel filter
F1000000003	Fuel Filter	Fuel filter
G021199	Element, Fuel Filter Primary	Fuel filter
GM50006	Fuel Filter	Fuel filter
GM50074	Fuel Filter (primary)	Fuel filter
P-205-003	Fuel Filter	Fuel filter
RE509031	Filter Element	Fuel filter
RE509032	Filter Element	Fuel filter
RE509036	Fuel Filter	Fuel filter
RE509208	Filter Element (also order R113565)	Fuel filter
RE5092082	Fuel filter	Fuel filter
RE516999	Screen	Fuel filter
RE519031	Fuel filter	Fuel filter
RE521537	Fuel Filter Assembly	Fuel filter
RE521538	Filter Element	Fuel filter
RE521539	Filter	Fuel filter
RE521540	Fuel Filter	Fuel filter
RE521541	Fuel Filter	Fuel filter
RE522868	Fuel Filter	Fuel filter
RE522878	Fuel filter	Fuel filter
RE526834	Filter Kit	Fuel filter
RE541922	PRIMARY FUEL FILTER	Fuel filter
RE544394	FINAL FUEL FILTER	Fuel filter
RG11830A	Final Fuel Filter/Water Separator Base	Fuel filter
RG11830C	Replace Final Fuel Filter/Water Separator	Fuel filter
RG9091	Final Fuel Filter Assembly	Fuel filter
RG12000	Injection Pump Drive Gear Removal	Fuel pump
RG12002	Injection Pump	Fuel pump
RG12022	Fuel Supply Pump Push Rod	Fuel pump
RG12036	JDG1559 Injection Pump Timing Pin	Fuel pump
RG4906	Fuel injection pump model and serial information on serial number plate	Fuel pump
RG7629B	Injection Pump Timing Marks A—Timing Mark on Front Plate B—Timing Mark on Injection Pump Flange	Fuel pump
RG7722	Fuel Injection Pump	Fuel pump
RG9051	Fuel Supply Pump Lines	Fuel pump
0000I00	Fuel Solenoid	Fuel solenoid
11-21011	Gasket	Gasket
11-31012	Gasket	Gasket
11-31031	Gasket, Turbo Oil Return	Gasket
11-31094	Gasket	Gasket
11-31099	Gasket	Gasket
11-31401	Gasket, K26 Turbo Mounting	Gasket
11-31615	Gasket	Gasket
11-79501	Gasket,Oil Filler & Block-Off Plate Mtg	Gasket
14-31042	Gasket	Gasket
18648	Cap, fuel fill with gasket	Gasket
19238	Gasket, fuel fill	Gasket
22323	Gasket, fuel sending unit	Gasket
25-11017	Gasket	Gasket
29-09400	Gasket Set (Engine Overhaul, includes all keys)	Gasket
29-09402	Gasket Set (Engine Overhaul, includes all keys)	Gasket
33265	Gasket, 3.0 exhaust pipe flange	Gasket
4194-21011	Gasket	Gasket
44-31031	Gasket	Gasket
44-31401	Gasket	Gasket
65626	Gasket—Oil Filler Cap	Gasket
65629	Cylinder Head Assembly consisting of IA-C Cylinder Head, EA45 Exhaust Valve Spring, EA57 Valve Spring Gasket, EA65 Exhaust Valve, 65562 Valve Spring Washers, EA38 Valve Spring Cup, EA34 Valve Spring Washer	Gasket
CAMSET000301	CAM(WITH BOLT,GASKET)	Gasket
FP-RE37715-WS	Gasket Set, Complete Overhaul w/Front and Rear Seals	Gasket
M-RE532713	Gasket Set - Overhaul	Gasket
M-RE532842	Gasket Set - Cyl Head	Gasket
M-RE536967	Gasket Set - Cyl Head	Gasket
PG219S	Gasket Set, In-frame Overhaul	Gasket
PG301PS	Gasket Set, Oil Pan	Gasket
R108612	Gasket	Gasket
R108730	Gasket	Gasket
R108848	Gasket	Gasket
R116515	Engine Cylinder Head Gasket	Gasket
R116516	Engine Cylinder Head Gasket	Gasket
R123226	Gasket, Water By-pass Tube	Gasket
R123345	Gasket, Thermostat Housing	Gasket
R123352	Gasket	Gasket
R123353	Gasket	Gasket
R123354	Gasket, Engine Oil Pan	Gasket
R123417	Gasket, Water Pump	Gasket
R123501	Gasket	Gasket
R123504	Gasket, Remote Oil Filter Adapter	Gasket
R123525	Gasket	Gasket
R123542	Gasket, Rocker Arm Cover Mounting	Gasket
R123543	Gasket, Rocker Arm Cover	Gasket
R123570	Gasket	Gasket
R123572	Gasket	Gasket
R123676	Gasket	Gasket
R125670	Gasket	Gasket
R133893	Gasket	Gasket
R134465	Gasket	Gasket
R135896	Gasket	Gasket
R136495	Gasket	Gasket
R136516	Gasket, Timing Gear Cover	Gasket
R47693	Gasket	Gasket
R500374	Gasket	Gasket
R501428	Gasket	Gasket
R505174	Gasket	Gasket
R521158	Turbo Gasket	Gasket
R521493	Gasket	Gasket
R522690	Gasket	Gasket

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Filters for this engine

Air filter: John Deere AL204809 John Deere AT390262 John Deere AT390261 John Deere AL119839 John Deere AL150285 John Deere AL150288 John Deere RE508969 John Deere F052645
Fuel filter (primary): Kohler GM50006 Kohler 336661 Kohler GM48727 Kohler GM50074 John Deere AT274723 John Deere RE62418 John Deere RE62419 John Deere RE509208
Oil filter: Kohler GM32809 Kohler 360031 John Deere RE519987 John Deere MIU800650 John Deere DZ118286 Donaldson P550779 Donaldson P502051 Donaldson P551352

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

Also used in

Broce Broom RJ350 — Sweeper
John Deere 210L — Backhoe Loader
John Deere 5080R — Tractor
John Deere 5080RN — Tractor
John Deere 5090R — Tractor
John Deere 5090RN — Tractor
John Deere 5100R — Tractor
John Deere 5100RN — Tractor
John Deere 6320SE — Tractor
John Deere 6420SE — Tractor
John Deere 6602 — Combine
John Deere A400 — Windrower

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.

Common questions

What is the oil capacity of the John Deere 4045HF285K?

The John Deere 4045HF285K engine has an oil capacity of 13.9 liters.

What is the displacement of the John Deere 4045HF285K?

The John Deere 4045HF285K has a displacement of 4.5 liters with 4 cylinders.

Which generators use the John Deere 4045HF285K engine?

The John Deere 4045HF285K powers 1 generator set(s), including Kohler 125REOZJG.

What oil filter does the John Deere 4045HF285K use?

The John Deere 4045HF285K uses oil filter part numbers Kohler GM32809, Kohler 360031, John Deere RE519987.

What fuel filter does the John Deere 4045HF285K use?

The John Deere 4045HF285K uses fuel filter part numbers Kohler GM50006, Kohler 336661, Kohler GM48727.

What air filter does the John Deere 4045HF285K use?

The John Deere 4045HF285K uses air filter part numbers John Deere AL204809, John Deere AT390262, John Deere AT390261.

What is a common problem with the John Deere 4045HF285K engine?

A commonly reported issue on generators using the John Deere 4045HF285K is: Emergency Stop. Fix: Reset the emergency stop switch..