Cummins/Onan KTA-50G3 — Oil Capacity 215.6 qt (204 L)

Service parts for the KTA-50G3

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

140-2098Air filtersee priceAmazon

Belts

1 required

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

Specifications

Fuel	diesel
Frequency	60.0 Hz
Standby power	1250 kW
Oil capacity	204 L (215.6 US qt)
Alternator	DFLC
Voltage options	277/480 V
Phase	3
Rated current	1504 A
Power factor	1
Battery group	8DFT
Battery quantity	4

Engine

Cummins/Onan KTA50-G3

Oil capacity	204 L (215.6 US qt)
Coolant capacity	400.0 L
Displacement	50.0 L
Aspiration	Turbocharged
Rated speed	1500 rpm

Filters for the Cummins/Onan KTA50-G3

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

System	Filter	Description	Cross-references
Oil filter	P551670	Lube Filter, Spin-On Full Flow	CUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026	FridayParts $26.68
Oil filter	P550777	Lube Filter, Spin-On Bypass	CUMMINS 3021658, CUMMINS 33004232, NAPA 1749, BALDWIN B7577	FridayParts $43.56
Fuel filter	P550105	Fuel Filter, Spin-On Primary	CUMMINS 154700, CUMMINS 154710, NAPA 3109, NAPA 3405	buy
Fuel / water separator	P552216	Fuel Filter, Water Separator Spin-On Twist&Drain	CUMMINS 3309437, CUMMINS 3313304, NAPA 3613, BALDWIN BF1216	buy

Same engine, other brands

2 brands

The Cummins/Onan KTA50-G3 in this set also powers 4 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

Brand	Models
Katolight	D1250FNZ4, D1250FRZ4, D1250FSZ4
Everdigm	EDG-1250C

Maintenance & consumables

for the Cummins/Onan KTA50-G3

Item	Spec	Capacity	Part #
Air filter	Air Cleaner - Throwaway Type		140-2098	Amazon eBay
Fuel filter			—
Oil filter			—
Battery		×4	—
Belt	Decal - Caution Fan Drive & Lube Components Group Belt.		98-5347	Amazon eBay
Coolant		440.0 l	—
Oil		204 L (215.6 US qt)	—
Spark plug			—

Service intervals

Item	Action	Hours	Months	Notes
Вентиляционные устройства генератора	Check	10 hr		10 часов / еженедельно
Весь агрегат	Test	10 hr		Включение минимум на час, предпочтительно с нагрузкой 50 %; 10 часов / еженедельно
Подключение вспомогательной клеммной коробки	Check	10 hr		10 часов / еженедельно
Уровень охладителя воды	Check	10 hr		10 часов / еженедельно
Уровень смазочного масла в двигателе	Check	10 hr		10 часов / еженедельно
Уровень топлива	Check	10 hr		10 часов / еженедельно
Уровень электролита в батарее	Check	10 hr		10 часов / еженедельно
Вентиляционный клапан топливного бака	Check	100 hr		100 часов / ежемесячно (положение отметки в таблице)
Все переключатели (в т.ч. двигателя)	Test	100 hr		100 часов / ежемесячно
Осадок в топливном баке	Drain	100 hr		100 часов / ежемесячно (положение отметки в таблице)
Отверстие и внутреннее пространство генератора	Clean	100 hr		Очистка сухим воздухом; 100 часов / ежемесячно
Соленоид подачи топлива	Check	100 hr		100 часов / ежемесячно
Уровень зарядки батареи гидрометром	Test	100 hr		100 часов / ежемесячно
Воздушный фильтр (у масляного – уровень масла)	Check	200 hr		200 часов / ежегодно
Все болты и гайки	Check	200 hr		Проверка и затягивание при необходимости; 200 часов / ежегодно
Все реле распределительной аппаратуры	Test	200 hr		200 часов / ежегодно
Кабельные контакты батареи	Clean	200 hr		200 часов / ежегодно; зачистка и смазка
Линии топлива, воздуха и выхлопная система на протечки	Check	200 hr		200 часов / ежегодно
Натяжение клиновидного ремня	Check	200 hr		200 часов / ежегодно
Плавкие предохранители и отключающие устройства	Check	200 hr		200 часов / ежегодно
Подшипники генератора	Lubricate	200 hr		200 часов / ежегодно
Проверка агрегата изготовителем	Inspect	200 hr		200 часов / ежегодно
Противовибрационные устройства	Check	200 hr		При наличии таковых; 200 часов / ежегодно
Смазочное масло	Change	200 hr		200 часов / ежегодно
Чистка всего агрегата и наружной поверхности панели управления	Clean	200 hr		200 часов / ежегодно
Чистота контакторов и контактов прерывателей	Check	200 hr		200 часов / ежегодно
Air compressor air cleaner element	Replace	250 hr	6 mo	Cummins two-cylinder compressor
Belt tension	Check	250 hr	6 mo	Measure in center span of pulleys; fan idler pulley design self-tensions
Belts	Check	250 hr	6 mo	Replace cracked or frayed belts
Coolant filter	Change	250 hr	6 mo	At each oil and filter change interval
Cooling fan	Check	250 hr	6 mo	Check cracks, loose rivets, bent or loose blades
Cooling system additives (DCA4)	Check	250 hr	6 mo	Check concentration whenever coolant is added between filter changes
Crankcase breather tube/hose	Check	250 hr	6 mo	Remove and check internally for obstructions or sludge; clean or replace
Engine oil and oil filters	Change	250 hr	6 mo	Whichever occurs first
Fuel filter	Replace	250 hr	6 mo	Clean area around fuel filter head first
Batteries	Check	1500 hr	12 mo	Check electrolyte level and state of charge
Cold start aids	Check	1500 hr	12 mo	Oil pan heater and engine coolant preheater
Crankshaft end clearance	Inspect	1500 hr	12 mo	Measure with dial indicator
Engine mounting bolts and nuts	Check	1500 hr	12 mo	Check torque annually; inspect rubber for deterioration
Engine protection system	Check	1500 hr	12 mo	Follow manufacturer's recommended procedures

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

Service specifications

Type	Item	Value	Unit	Condition
Clearance	Crankshaft end clearance	0.13 to 0.51	mm	engine mounted in unit
Clearance	Fan hub bearing end clearance	0.03 to 0.15	mm
Other	Air starting motor minimum air pressure	480	kPa
Other	Alternator belt tension	356	N	Burroughs tension gauge ST-1293
Other	Fan belt tension (20, 22, 24 inch fan center)	2668.9 to 2891.3	N	two pulley fan drive
Other	Fan belt tension verification (28 inch fan center)	2891.3 to 3336.2	N	two pulley fan drive
Other	HVT non-top stop injector travel adjustment	10.234	mm
Other	Maximum intake restriction, clean air filter element	380	mm H2O
Other	Maximum intake restriction, dirty air filter element	635	mm H2O
Other	Minimum cranking speed without starting aid	150	RPM
Other	PTD injector travel limits	7.77 to 7.87	mm
Other	PTD non-top stop injector travel adjustment	7.82	mm
Other	Turbocharger end play - AiResearch T18A	0.10 to 0.23	mm
Other	Turbocharger end play - HT100	0.06 to 0.16	mm
Other	Turbocharger end play - Holset HC5A	0.05 to 0.13	mm
Other	Vibration damper maximum thickness - Houdaille	65.38	mm
Other	Vibration damper thickness variation - maximum	0.25	mm	four locations 90 degrees apart
Other	Глубина фундамента/цоколя и выступ за пределы агрегата	не менее 150	мм (6 дюймов)
Other	Минимальное расстояние от генератора до стены, резервуара или панели в машинном зале	1	м
Other	Нагрузка на грунт (ННГ) от агрегата, охладителя, топлива и фундамента	менее 9800	кг/м2 (2000 фунтов на кв. фут) или 96 кПа	требует проверки по местным нормам
Other	Площадь впускного отверстия воздуха для агрегатов с радиаторным охлаждением	в 1,5-2 раза больше площади радиатора
Other	Просвет выхлопной трубы глушителя	12	дюйма (300 мм)	двигатель QSK60
Other	Просвет выхлопной трубы глушителя	3	дюйма (76 мм)	двигатели B3.3, 4B, 6B
Other	Просвет выхлопной трубы глушителя	4	дюйма (100 мм)	двигатель 6C
Other	Просвет выхлопной трубы глушителя	6	дюйма (152 мм)	двигатели L, N, K19, V28
Other	Просвет выхлопной трубы глушителя	6×2	дюйма (152 мм)	двигатели K38, QSK30
Other	Просвет выхлопной трубы глушителя	8	дюйма (200 мм)	двигатели K50, QSK15
Other	Прочность бетона фундамента на сжатие (28 суток)	не менее 17200	кПа (2500 фунтов на кв. дюйм)
Pressure	Exhaust back pressure - maximum	75	mm Hg	at rated speed and load
Pressure	Maximum allowable restriction to pump - clean filter	100	mm Hg	at rated power
Pressure	Maximum allowable restriction to pump - dirty filter	200	mm Hg	at rated power
Pressure	Maximum allowable return line restriction	63	mm Hg
Pressure	Oil pressure - minimum at idle RPM	138	kPa
Pressure	Oil pressure, main oil rifle - maximum at rated RPM	483	kPa	15W-40 oil at 107 C [225 F]
Pressure	Oil pressure, main oil rifle - minimum at rated RPM	310	kPa	15W-40 oil at 107 C [225 F]
Pressure	Throttle air cylinder leak test pressure	689	kPa	no leakage allowed
Pressure	Throttle air cylinder test pressure	560	kPa	extension rod retracted
Pressure	Предел обратного давления в выхлопной системе (большинство агрегатов Cummins)	3	дюйма рт. ст. (76 мм рт. ст.)	у последних моделей при максимальном потоке снижено до 2 дюймов рт. ст. (50 мм рт. ст.)
Resistance	Сопротивление электрода заземления при глухом занулении генераторной установки	не более 20	Ом	рекомендуется, независимо от системы защиты
Speed	Engine speed - must not exceed	2400	RPM	any circumstances
Temperature	Coolant temperature - maximum top tank	95	C
Temperature	Coolant temperature - minimum top tank	70	C
Temperature	Damper leakage detection oven temperature	93	C	2 hours in oven
Temperature	Oil temperature - maximum	120	C
Temperature	Допустимое повышение температуры в машинном зале при полной нагрузке	10-15	°C (18-27 °F)	если температура в зале превышает 40 °C – подавать аспирационный воздух извне или снизить нагрузку
Temperature	Расчетная температура окружающей среды для размеров машинного зала	40	°C
Temperature	Температура хладагента для облегчения пуска аварийного агрегата	выше 40	°C
Temperature	Температура эксплуатации батарей для оптимальной работы	15-25	°C
Torque	Adjusting link and alternator mounting capscrews	55	Nm
Torque	Crosshead adjusting screw lock nut - with adapter ST-669	35	Nm
Torque	Crosshead adjusting screw lock nut - without adapter	40	Nm
Torque	Injector adjusting screw lock nut - with adapter ST-669	45	Nm
Torque	Injector adjusting screw lock nut - without adapter	60	Nm
Torque	Injector hold down clamp capscrew	16	Nm
Torque	Injector jumper tube connector screw	25	Nm
Torque	Oil drain plug	100	Nm
Torque	Rocker lever cover	40	Nm
Torque	Rocker lever shaft (12 pt capscrew)	90	Nm
Torque	STC or HVT injector adjustment	10	Nm	in engine
Torque	Valve adjusting screw lock nut - with adapter ST-669	45	Nm

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

Recommended fluids

Fluid	Grade	Standard	Ambient	Notes
Coolant	50 percent ethylene glycol / 50 percent water	Low-silicate antifreeze meeting ASTM D4985 (less than .10% silicate)		50/50 gives -34 F freeze point and 228 F boiling point; working range 40 to 60 percent antifreeze; use refractometer, not hydrometer; pre-charge 1.5 SCA units per gallon
Coolant	Смесь воды и антифриза 50/50; низкосиликатный антифриз	Добавка Cummins DCA4 или эквивалент		Вода чистая, без хлоридов, сульфатов и кислот, с pH от 8,5 до 10,5; при заполнении холодной системы остается 6 (максимум 8) % дополнительной емкости для расширения
Coolant	60 percent ethylene glycol / 40 percent water	Low-silicate antifreeze	-54°C to -32°C	Arctic specification coolant mixture for -32 to -54 C [-25 to -65 F]
Engine oil	SAE 15W-40	API CE or CF4		Cummins Premium Blue or equivalent; CD or CD/SF acceptable where CE/CF4 not available; sulfated ash must not exceed 1.85 mass percent
Engine oil	SAE 5W-30 synthetic CE/SF	API CE or CF4	below -23°C	For ambient temperatures consistently below -23 C [-10 F] with no provision to keep engine warm
Fuel	ASTM No. 2 diesel	No. 2 D; blends of No. 2 D and No. 1 D below 0 C [32 F]		Viscosity must be kept above 1.3 cSt; maximum cloud and pour points 6 C [10 F] lower than ambient
Fuel	Дизельное топливо класса А1 или А2	BS 2869: Часть 1:1998 (класс А1); BS 2869: Часть 2:1998 (классы А2, С1, С2, D, E, F, G, H)		Топливо должно быть как можно более чистым, по возможности не содержать воды и загрязнений
Other	Природный газ	Наименьшая теплопроизводительность >30 МДж/Н·м3; плотность 0,7-0,9 кг/м3; метановое число >52; H2S >0,01 %; максимальная температура газа 50 °C	below 50°C	Требования к качеству газа для газовых двигателей; при несоответствии двигатель должен быть отключен

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

Procedures

PT (type D) Injector - Adjustment adjustment

⚠ The injector plunger is under spring tension. Do NOT allow the tool to slip.

Tools: 3822575 adjustment kit, 3822574 rocker lever actuator, ST-669 adapter

Install injector and valve adjustment kit, Part No. 3822575.
Adjust indicator tip to touch top of injector plunger.
Lower indicator 12.25 mm [0.5 inch] and lock support.
Depress rocker lever until injector bottoms two or three times.
Hold plunger bottomed and set indicator to ZERO.
Turn adjusting screw until indicator reads specified travel.
Tighten locknut; verify setting.

Valves and Injectors - General Checking and Adjustment adjustment

⚠ Use the correct chart for the engine or the parts will be damaged.

⚠ Crosshead adjustment must always be made before adjusting the valves.

Tools: 3376592 inch pound torque wrench, 3822575 injector and valve adjustment kit, 3822574 rocker lever actuator, ST-669 torque wrench adapter

Steam clean engine before removing rocker lever covers.
Remove rocker lever covers and related components.
Align valve set (VS) mark on damper or flywheel with pointer.
Determine cylinder in position; crossheads and valves ready when all valves closed.
Adjust crossheads before adjusting valves.
Adjust valves to lash specification with feeler gauge.
Adjust injectors per PT (type D) or STC/HVT method.
Tighten locknuts and reinstall rocker lever covers.

Установка и подключение аккумуляторной системы installation

⚠ При зарядке батарей выделяются взрывоопасные газы – обеспечьте вентиляцию, вдали от искр и открытого огня.

⚠ Перед подключением батарей переключатель Run/Off/Auto на панели управления должен находиться в положении Off (ВЫКЛ).

⚠ Не устанавливайте кислотные батареи в одном помещении с никель-кадмиевыми.

Tools: Торцевой гаечный ключ

Установите батареи в чистое, хорошо освещенное и вентилируемое место с легким доступом для обслуживания.
Подключайте землю ПОСЛЕДНЕЙ, а при извлечении батареи отключайте ее ПЕРВОЙ.
Вначале подключайте ПЛЮСОВОЙ кабель генератора, затем минусовой; соблюдайте полярность.
Тщательно затяните гайки межъячеечных соединений и смажьте контакты вазелиновым маслом.
Для 24 В соедините две или четыре 12-вольтовые батареи последовательно.

Cooling System - Cleaning System and Changing Antifreeze maintenance

⚠ Do not use caustic cleaners; aluminum components will be damaged.

⚠ Wait until temperature is below 50 C [120 F] before removing the pressure cap.

Drain the cooling system; do not allow it to dry out.
Add Fleetguard RESTORE or RESTORE PLUS (1 U.S. gallon per 38-57 liters capacity).
Fill system with plain water.
Operate engine at normal temperature (at least 85 C [185 F]) for 1 to 1.5 hours.
Shut off and drain the system.
Fill with clean water and operate at high idle 5 minutes above 85 C.
Shut off and drain; repeat flush if water is still dirty.
Refill with new heavy duty coolant and SCA.

Fan Belt - Removal and Installation (Back Side Idler System) maintenance

⚠ The fan belt idler is under tension. Do NOT allow your hands between the idler and belt or fan hub.

Tools: 8-point socket, breaker bar

Remove the back side idler end of the shock absorber, control rod, or turnbuckle.
Loosen upper capscrew and remove lower capscrew.
Relieve idler spring tension with an 8-point socket and breaker bar.
Remove the fan belt.
Install the belt on crankshaft and fan hub pulley, aligning grooves with pulley ribs.
Rotate idler against spring and install lock washer and capscrew; torque 45 Nm.
Install control rod or shock absorber and tighten capscrews to 60-90 Nm.

Fuel Filter(s) - Replacement maintenance

Tools: 3375049 filter wrench

Clean area around the fuel filter head.
Remove the fuel filter with filter wrench, Part No. 3375049.
Clean the filter head gasket surface with a lint-free towel.
Apply a light film of clean engine oil to the filter gasket.
Fill the filter with clean fuel and install on the head.
Tighten until gasket contacts head, then per filter manufacturer.

Fuel-Water Separator - Draining maintenance

⚠ Do not overtighten the valve. Overtightening can damage the threads.

Shut off the engine.
Open the drain valve by hand, turning counterclockwise 1-1/2 to 2 turns.
Drain the filter sump until clear fuel is visible.
Turn the valve clockwise 1-1/2 to 2 turns to close.

Lubricating Oil and Oil Filter - Changing/Replacement maintenance

⚠ Avoid direct contact of hot oil with your skin.

⚠ Fill oil filters with clean lubricating oil; lack of lubrication is harmful.

Tools: 3375049 oil filter wrench

Operate engine until coolant reaches 60 C [140 F]; shut off.
Remove oil drain plug and drain oil immediately.
Clean filter head and gasket surface; remove o-ring if stuck.
Remove and discard full flow and bypass filters.
Fill new filters with clean lubricating oil and lubricate gaskets.
Install filters; tighten per filter manufacturer.
Install and tighten oil drain plug to 100 Nm [75 ft-lb].
Fill engine with clean oil to correct level.

Starting Procedure - After Extended Shutdown or Oil Change maintenance

Disconnect the electrical wire from the fuel pump solenoid valve.
Rotate the crankshaft with the starting motor until oil pressure appears.
Connect the electrical wire to the fuel pump solenoid valve.
Start the engine.

Turbocharger - Inspection maintenance

Tools: ST-537 dial depth gauge, dial indicator, feeler gauge

Remove air intake and exhaust piping.
Look for damaged or cracked compressor or turbine blades.
Check that the turbocharger shaft spins freely.
Measure axial clearance (end play) and compare to specification.
Measure radial clearance (side to side).
Rebuild or replace if out of specification.

Vibration Damper - Checking maintenance

⚠ Do not repair or balance a viscous damper in the field.

Tools: paint solvent, fine emery cloth, micrometer

Clean the exterior of the damper with solvent.
Inspect mounting flange for cracks.
Inspect housing for dents, bulges, or leaks.
Remove paint and measure thickness at four locations, 90 degrees apart.
Replace damper if damaged or thickness exceeds specification.
Replace damper after 24,000 hours regardless of measurement.

Методика подготовки хладагента maintenance

⚠ Перед снятием крышки радиатора дайте системе остыть и стравите давление.

Добавьте требуемое количество воды в смесительный резервуар и растворите в ней требуемое количество DCA.
Добавьте требуемое количество антифриза и тщательно перемешайте.
Залейте хладагент в систему охлаждения и надежно заверните крышку радиатора.

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
277/480	3		12	Generator end is 12 lead reconnectable and has PMG permanent magnet generator

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

Common questions

What size generator is the Cummins/Onan KTA-50G3?

The Cummins/Onan KTA-50G3 is rated 1250 kW standby.

What engine is in the Cummins/Onan KTA-50G3?

The Cummins/Onan KTA-50G3 is powered by the Cummins/Onan KTA50-G3 engine.

What kind of fuel does the Cummins/Onan KTA-50G3 run on?

The Cummins/Onan KTA-50G3 runs on diesel.

How much oil does the Cummins/Onan KTA-50G3 take?

The Cummins/Onan KTA-50G3 takes 204 L (215.6 US qt) of engine oil (Cummins/Onan KTA50-G3 engine specification).

What is the coolant capacity of the Cummins/Onan KTA-50G3?

The Cummins/Onan KTA-50G3 cooling system holds 400 liters (105.7 US gallons) for the engine, per the manufacturer specification sheet.

What voltages is the Cummins/Onan KTA-50G3 available in?

The Cummins/Onan KTA-50G3 is offered in 277/480 V, 3-phase.

What size battery does the Cummins/Onan KTA-50G3 need?

The Cummins/Onan KTA-50G3 uses 4 batteryies, group 8DFT, per the manufacturer specification sheet.

Which alternator is fitted to the Cummins/Onan KTA-50G3?

The Cummins/Onan KTA-50G3 uses a DFLC alternator.

What air filter does the Cummins/Onan KTA-50G3 use?

The Cummins/Onan KTA-50G3 uses air filter part number 140-2098.

Repair guides

Step-by-step procedures compiled from the Cummins/Onan service manual for this model.

Parts

138

Part #	Description	Qty	System
122-0757	Filter. Water - W/Corosion Inhibiting Chemical		Filter	Amazon eBay
140-2096	Element, Primary (Outer)	2	Air filter	Amazon eBay
140-2098	Air Cleaner - Throwaway Type	1	Air filter	Amazon eBay
140-2467	Element, Safety (Inner)	2	Air filter	Amazon eBay
149-2232	Starter - 24 VDC	3	Starter	Amazon eBay
193-0244	Sender, Oil Pressure (E1)	1	Sensor	Amazon eBay
193-0375	Sender, Coolant	1	Sensor	Amazon eBay
309-0269	Sender, Temperature-Lo Engine	1	Sensor	Amazon eBay $239.00
309-0272	Regulator, Voltage - 24 VDC (Used on 35 A MP Alternator)	1	Alternator	Amazon eBay
309-0561	Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator)	1	Alternator	Amazon eBay
3375004	Dial Indicator Kit for injector and valve adjustment		Injector	eBay
338-2529	Harness. Wiring	1	Harness	Amazon eBay
338-2925	Hose, Radiator	1	Hose	Amazon eBay
3822575	Injector and valve adjustment kit	1	Injector	Amazon eBay FridayParts $96.36
503-0183	Clamp, Hose	1	Hose	Amazon eBay
505-0324	Hose. Bulk (Sold by the Foot) Two Feet Required Nipple, Pipe - Half (3/4 NPT x 2"LG)	1	Hose	Amazon eBay
508-0292	Washer, Sealing - Copper	1	Seal	Amazon eBay
98-5347	Decal - Caution Fan Drive & Lube Components Group Belt.	2	Belt	Amazon eBay
98-5759	Drive - Multi Groove Hose, Flexible - Lube (Grease)	1	Hose	Amazon eBay
98-5842	Clamp, Hose - T-Bolt Type (3.5" NON)	1	Hose	Amazon eBay
FP-3053124	Injector Assembly, PTK (New)		Injector	eBay
M-4352581	Upper Gasket Set		Gasket	Amazon eBay
016-40820	Harness, Wiring (Includes Cable Ties and Terminals)	17	Service part / kit	Amazon eBay
102-1335	Plug, Oil Drain	1	Service part / kit	Amazon eBay
140-2097	Cleaner, Air (Includes Elements)	1	Service part / kit	Amazon eBay FridayParts $856.89
300-2856	Board Assy, Printed Circuit	1	Service part / kit	Amazon eBay
300-2863	Board Assy, Printed Circuit - Relay Assembly- (A14)	1	Service part / kit	Amazon eBay
301-9054-01	Decal - Panel Front Markings (Control With Meters)	1	Service part / kit	Amazon eBay
301-9054-02	Clip - Fastener	1	Service part / kit	Amazon eBay
301-9054-03	Clip - Fastener	1	Service part / kit	Amazon eBay
302-1720	Meter, Frequency (M23)	1	Service part / kit	Amazon eBay
302-1753	Ammeter (M22) See Current Transformer & Ammeter Installation Figure for Parts)	1	Service part / kit	Amazon eBay
302-1800	Ammeter (M22) Scale in Amps as Indicated 0-2000/0-4000 (600 VAC Application) 0-3000/0-6000 (120-480 VAC Application)	1	Service part / kit	Amazon eBay
302-1908	Screw. Cap - Hex Head (M8-1.25 x 35MM)	2	Service part / kit	Amazon eBay
305-0813-01	Battery charger, Onan, 120V, 375W		Service part / kit	eBay $520.00
305-0818-02	EOOO-21002	1	Service part / kit	Amazon eBay
307-1056	Relay. 24 VDC	3	Service part / kit	Amazon eBay $49.00
307-1987	2 307-1056 3 3 815-0388 6 4 323-0804 3 5 815-0544 3 6 319-0447 1 7 NOTE 1 REF 8 NOTE 2	6	Service part / kit	Amazon eBay
308-0882	Decal - Panel Front Markings (Control Without Meters)	1	Service part / kit	Amazon eBay
309-0436	Decal - Model Identification ONAN GEN SET CUMMINS GEN SET CUMMINS ONAN GEN SET	1	Service part / kit	Amazon eBay
309-0437	(222"F)	1	Service part / kit	Amazon eBay
3096680	Piston STC 13.8:1 Ratio	1	Service part / kit	Amazon eBay NAPA $267.09 FridayParts $1085.70
3096681	Piston KT Series 15.5:1 Ratio	1	Service part / kit	Amazon eBay NAPA $277.52 FridayParts $209.79
3096682	Piston KTA Series 14.5:1 Ratio	1	Service part / kit	Amazon eBay NAPA $273.70 FridayParts $214.73
3096683	Piston 13.5:1 Ratio	1	Service part / kit	Amazon eBay
3096684	Piston KTA 15.7:1 Ratio	1	Service part / kit	Amazon eBay $223.80
3096685	Piston STC 13.9:1 Ratio	1	Service part / kit	Amazon eBay NAPA $270.94 FridayParts $192.55
319-0447	Screw. Machine - Pan Head. Cross-Recessed Drive (#6-32 x 1/2")	1	Service part / kit	Amazon eBay
319-0754	Tie. Cable	1	Service part / kit	Amazon eBay
322-0363	Component 322-0363	1	Service part / kit	Amazon eBay
323-0804	Screw. Machine - Round Head with IT Lock Washer (#6-32 x 1/2")	3	Service part / kit	Amazon eBay
323-1200	# Socket, Contact (Used in J1, J2)	1	Service part / kit	Amazon eBay
323-1304	tiotming, Umector	1	Service part / kit	Amazon eBay
323-1306	Genset component (SJB series)	1	Service part / kit	Amazon eBay
332-0052	Clamp, Loop	1	Service part / kit	Amazon eBay
332-0607	Block, Terminal (T81)	1	Service part / kit	Amazon eBay
332-1279	Terminal. Lug - Ring (3/8	6	Service part / kit	Amazon eBay
332-1292	Sender, Pressure - Oil (E123)	1	Service part / kit	Amazon eBay
332-1445	Tie, Cable 18 98-5219 1 Decal - Panel Front (Not I l l u s t r a t e d ) 19 98-5220 1 Decal	3	Service part / kit	Amazon eBay
332-1673	Terminal, Wire - Spade	2	Service part / kit	Amazon eBay
332-2634	Clamp, Hose	1	Service part / kit	Amazon eBay
332-2723	Strip. Marker	1	Service part / kit	Amazon eBay
3375005	Dial indicator extension		Service part / kit	eBay
3375007	Support Plate / Support Block for dial indicator		Service part / kit	eBay
338-1835	Harness, Wiring (A13 to A l l )	1	Service part / kit	Amazon eBay
338-1836	Harness, Wiring (A14 to All) (Relays)	1	Service part / kit	Amazon eBay
338-1904	Harness. Wiring (A15 to All)	1	Service part / kit	Amazon eBay
338-2278	Harness. Wiring - AC (Includes Terminal Block & Cable Ties) [Used only with meters]	1	Service part / kit	Amazon eBay $77.00
338-2532	Terminal. Lug - Forked (No. 6 Screw)	4	Service part / kit	Amazon eBay
355-0093	Voltmeter (M21) Dual Scale 0-300/0-600V Single Scale 0-750V	1	Service part / kit	Amazon eBay
3628731	Piston STC Kit	1	Service part / kit	Amazon eBay
3630913	Piston KTA-50-G7	1	Service part / kit	Amazon eBay
3631241	Piston Kit STC 13.9:1 Ratio	1	Service part / kit	Amazon eBay NAPA $316.30 FridayParts $264.60
3631242	Piston Kit 13.5:1 Ratio	1	Service part / kit	Amazon eBay
3631243	Piston Kit KTA 15.7:1 Ratio	1	Service part / kit	Amazon eBay NAPA $307.04
3631244	Piston Kit KTA Series 14.5:1 Ratio	1	Service part / kit	Amazon eBay NAPA $317.90 FridayParts $228.99
3631245	Piston Kit KT Series 15.5:1 Ratio	1	Service part / kit	Amazon eBay NAPA $307.59 FridayParts $209.79
3631246	Piston Kit STC 13.8:1 Ratio	1	Service part / kit	Amazon eBay NAPA $313.23 FridayParts $199.99
3803530	Piston Assembly STC	1	Service part / kit	Amazon eBay FridayParts $25.89
3804747	Piston Kit KTA-50-G7	1	Service part / kit	Amazon eBay
3804885	Piston KTA-50-G8/G9	1	Service part / kit	Amazon eBay NAPA $435.16 FridayParts $265.56
406-0333	Component 406-0333	2	Service part / kit	Amazon eBay
406-0334	Clip, Retaining - Turnbutton Fastener	2	Service part / kit	Amazon eBay
4089847	Piston Kit GTA38/19	1	Service part / kit	Amazon eBay
4090013	Piston Kit KTA-38-M2	1	Service part / kit	Amazon eBay
4090029	Piston Kit QSK19CE	1	Service part / kit	Amazon eBay
4090181	Piston GTA38/19	1	Service part / kit	Amazon eBay
4097889	Piston KTA-38-M2	1	Service part / kit	Amazon eBay
4910463	Piston QSK19R/M	1	Service part / kit	Amazon eBay
4910465	Piston QSK Series	1	Service part / kit	Amazon eBay FridayParts $1134.77
4916177	Piston GTA/GQSK19	1	Service part / kit	Amazon eBay
4918058	Piston QSK19CE	1	Service part / kit	Amazon eBay
4922319	Piston QSK19C	1	Service part / kit	Amazon eBay
4955233	Piston Kit QSK19R/M	1	Service part / kit	Amazon eBay
4955235	Piston Kit QSK Series	1	Service part / kit	Amazon eBay FridayParts $1134.77
4955236	Piston Kit QSK19C	1	Service part / kit	Amazon eBay
4955238	Piston Kit GTA/GQSK19	1	Service part / kit	Amazon eBay
501-0520	Screw, Cap - Hex Head (3/8-24 x 5/8")	1	Service part / kit	Amazon eBay
501-0524	Washer, Lock - EIT (3/8")	1	Service part / kit	Amazon eBay
504-0028	Valve, Radiator Drain	1	Service part / kit	Amazon eBay
505-0007	Belt. Drive - Multi Groove (Used with 35 A MP Alternator * Pulley, Alternator - Multi Groove (Use with 75 A MP Alternator)	2	Service part / kit	Amazon eBay
505-0021	Bushing, Pipe - Reducer (3/4º to 1/2º)	1	Service part / kit	Amazon eBay
505-0100	Nipple, Pipe - Close (1/2”)	1	Service part / kit	Amazon eBay $9.34
505-0102	Filter. Water - W/Corosion Inhibiting	1	Service part / kit	Amazon eBay
505-0117	Bushing, Reducer - Flush, Brass (1/2' NPT x3/8° NPT)	1	Service part / kit	Amazon eBay
505-0132	Nipple, Pipe - Close (3/4 NPT x l-3/8"LG) Elbow. Pipe - 90* (3/4 NPT)	1	Service part / kit	Amazon eBay
508-0015	Washer, Insulating - Fiber (#8)	1	Service part / kit	Amazon eBay
517-0131	Capacitor (Used across Voltmeter Terminals on some Sets)	1	Service part / kit	Amazon eBay
800-0062	Nut, Insulated	1	Service part / kit	Amazon eBay
800-0270	DCA4 Service Pre-Charging Complete System	1	Service part / kit	Amazon eBay
800-2060	Screw, Cap - Hex Head (M8x 1.25 x35)	1	Service part / kit	Amazon eBay
809-0035	Screw, Machine - Thread Cutting, Round Head (#8 X 3/4')	1	Service part / kit	Amazon eBay
812-0063	853-0003 300-2856 338-1836 812-0063 853-0003 300-2863 338-1835 332-1445 NOTE 1 NOTE 2 332	2	Service part / kit	Amazon eBay
812-0065	Screw, Machine - Round Head (#6 - 32 x 5/8')	2	Service part / kit	Amazon eBay
812-0084	Screw. Machine - Round Head (	4	Service part / kit	Amazon eBay
815-0388	Bracket. Mounting - Relay Lead(s), Electrical Wire, Electrical - 20 AW G, Insulated Terminal, Wire - Forked, 18-20 Gauge	6	Service part / kit	Amazon eBay
815-0544	Screw, Machine - Round Head IT Washer (#6 - 32 x 1/2')	3	Service part / kit	Amazon eBay
821-0004	Screw, Self-Locking - Hex	4	Service part / kit	Amazon eBay
850-0050	Washer, Lock - Spring (3/8”)	2	Service part / kit	Amazon eBay
853-0003	Washer, Lock - ET (#6)	4	Service part / kit	Amazon eBay
856-0008	Washer, Lock - EIT (5/16'1)	1	Service part / kit	Amazon eBay
856-0010	Washer, Lock - EIT (3/8')	1	Service part / kit	Amazon eBay
870-0131	Nut. Hex - with ET (#10-32)	1	Service part / kit	Amazon eBay
870-0196	Nut, Insulating (#8)	1	Service part / kit	Amazon eBay
98-4732	Caution	1	Service part / kit	Amazon eBay
98-4798	Decal - Caution "7# PSI HOT WATER SYSTEM"	1	Service part / kit	Amazon eBay
98-5298	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5299	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5316	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5387	Nut, Self-Locking - with ET Lockwasher (#10-32)	1	Service part / kit	Amazon eBay
98-5393	Screw, Tapping - Round Head (#8 x 3/4")	2	Service part / kit	Amazon eBay
98-5822	Bushing, Reducer - Flush (1/2 NPT x 3/8 NPT)	3	Service part / kit	Amazon eBay
98-6108-03	Decal - Model Identification	1	Service part / kit	Amazon eBay
98-6111-03	ONAN GEN SET CUMMINS GEN SET	1	Service part / kit	Amazon eBay
98-6139-03	CUMMINS ONAN GEN SET	1	Service part / kit	Amazon eBay
98-6169	Terminal Assembly (Includes Replaceable Items 26 thru 29)	1	Service part / kit	Amazon eBay
F-2375	A single line drawing of the prime power system		Service part / kit	Amazon eBay
M-3804747	Piston Kit		Service part / kit	Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Available documents

Spec sheet — 1340 DFLE (Cummins/Onan)Operator's manual — 1695718380-pUKe (Mapna Group)Reference — 1120DFLC (Cummins/Onan)Reference — Cummins-DFLC-KTA50-G3-25275936-load-test-report-and-inspection-checklist (Central States Diesel Generators)Reference — KTA50 60HZ 1120~1545kw (Cummins/Onan)Owner's manual — Cummins Diesel K38-50 Manual 1993 (Cummins/Onan)Parts manual — 960-0205B Onan Power Command Control Parts (1-1999) (Cummins/Onan)Parts manual — 960-0256 Onan DFLC KTA53 Parts Manual (2-1990) (Cummins/Onan)Parts manual — 960-0264 Onan DFLA DFMB KTA Series Parts Manual (1-1993) (Stamford/AvK)Parts manual — Cummints-KT-QSK-Series-Catalog-LR-1-27-2020x (Interstate-McBee)Parts manual — HHP - Cummins KT - QSK SERIES V1 (Highway and Heavy Parts (HHP))Parts manual — cum-catalog-kt-qsk-series-3-4-2024 (Interstate-McBee)Parts manual — cummins-kt-catalog-lr (Interstate-McBee, LLC / Cummins)Parts manual — cummins-kt-qsk-catalogue-2019 (Mitsubishi)Service manual — 2 Application and installation guide Eng (Cummins/Onan)Service manual — rukovodstvo-po-ekspluatacii-generatornyh-ustanovok-cummins (Cummins/Onan)

This page was generated from the 16 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

Cummins/Onan KTA-50G3 Generator Set

Service parts for the KTA-50G3

Air intake

Belts

Specifications

Engine

Filters for the Cummins/Onan KTA50-G3

Same engine, other brands

Maintenance & consumables

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Service specifications

Recommended fluids

Procedures

Voltage reconnection

Common questions

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Available documents