Frontier Power Products - John Deere 12.5 Litre Diesel Engines

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John Deere 12.5 Litre Diesel Engines

Features & Benefits
Specification Sheets
Industrial Engine Performance Data
Genset Ratings
Engine Dimensions

Ideal for higher horsepower, this 6-cylinder 12.5L engine features an articulated 2-piece piston with a high-strength steel crown and an electronically controlled John Deere fuel system to monitor critical functions. Optional rear PTO drives medium or large hydraulic pumps or compressors.

Features & Benefits
Articulated Two-Piece Piston
Articulated two-piece piston uses high-strength steel crown to handle the higher horsepower
Directed Top-Liner Cooling
Directing coolant to upper end of liner reduces liner temperatures by up to 130 degrees Fahrenheit or 72 degrees Celsius, improving power cylinder durability and head gasket life, and reducing oil consumption and emissions
Air Compressors and AC Compressors
Factory installed air compressors and AC compressors mean a a lower installed cost
Gear-Driven Auxiliary Drive
Provides up to 80 hp (60 kW) to run optional equipment such as hydraulic pumps, air compressors, or steering pumps
John Deere Electronic Controls
John Deere electronically controlled fuel systems monitor critical engine functions and either derates or shuts down (override capability provided) an engine to prevent costly engine repairs Built in controls eliminate the need for costly add-on engine warning/shutdown systems and associated components Service diagnostics and error codes automatically stored for later retrieval, increasing machine uptime Performance connector part of engine wiring harness which allows for programming of multiple power curves and droop or isochronous governor regulation
SAE J1939 Standard Communication Link
Industry standard, which provides an interface with vehicle systems, like the transmission, hydraulics and various accessory drives minimizing machine complexity and reducing vehicle total installed cost
Self-Adjusting, Poly-vee Accessory and Fan Drives
Self-adjusting, twelve-groove, poly-vee fan drive provides multiple fan drive ratios and fan heights that can be matched to specific application requirements Self adjusting, eight-groove, poly-vee accessory drive for alternator and air conditioning compressor Poly-vee design provides more than twice the drive capacity of comparable vee-belts
Optional Rear PTO
Rear PTO is an integral part of the flywheel housing and provides a means for driving medium/large hydraulic pump(s), and air compressors Available in SAE #1 configuration for dry or wet applications 1.3:1 output ratio allows the use of smaller, higher speed hydraulic pumps Gear train, pump drives, and flanged output drive are capable of up to 300 hp/224 kW (750 ft-lbs/1017 N.m torque) on an intermittent basis Right-hand side pad standard with optional left-hand side pad Standard SAE "C" and optional "B", "D" mounting pads and flange output drives

Specification Sheets
Click here for engine specification sheets from John Deere's website (opens in a new browser window)

Industrial Engine Performance Data
Model	Emission Certified	Rated Power Intermittent	Rated Power Continuous	Peak Torque Intermittent	Fuel Economy BSFC*	Aspiration
6125HF070	Tier 2		300 hp (224 kW) @ 2100 rpm	1015 lb-ft (1377 N.m) @ 1500 rpm	0.339 lb/hp-hr (206 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2		325 hp (242 kW) @ 2100 rpm	1098 lb-ft (1489 N.m) @ 1500 rpm	0.342 lb/hp-hr (208 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2		350 hp (261 kW) @ 2100 rpm	1185 lb-ft (1607 N.m) @ 1500 rpm	0.340 lb/hp-hr (207 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2		375 hp (280 kW) @ 2100 rpm	1268 lb-ft (1720 N.m) @ 1500 rpm	0.339 lb/hp-hr (206 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2		400 hp (298 kW) @ 2100 rpm	1352 lb-ft (1834 N.m) @ 1500 rpm	0.339 lb/hp-hr (206 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2		425 hp (317 kW) @ 2100 rpm	1436 lb-ft (1947 N.m) @ 1500 rpm	0.340 lb/hp-hr (207 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2	450 hp (336 kW) @ 2100 rpm		1523 lb-ft (2065 N.m) @ 1500 rpm	0.340 lb/hp-hr (207 g/kWh) @ 1500 rpm	Air-to-air
6125HF070	Tier 2	475 hp (354 kW) @ 2100 rpm		1605 lb-ft (2176 N.m) @ 1500 rpm	0.340 lb/hp-hr (207 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2	500 hp (373 kW) @ 2100 rpm		1690 lb-ft (2292 N.m) @ 1500 rpm	0.342 lb/hp-hr (208 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2	525 hp (392 kW) @ 2100 rpm		1775 lb-ft (2406 N.m) @ 1500 rpm	0.345lb/hp-hr (210 g/kWh) @ 2100 rpm	Air-to-air
6125HF070	Tier 2	550 hp (410 kW) @ 2100 rpm		1856 lb-ft (2517 N.m) @ 1500 rpm	0.344 lb/hp-hr (209 g/kWh) @ 2000 rpm	Air-to-air
6125HF070	Tier 2	600 hp (448 kW) @ 2100 rpm		1878 lb-ft (2546 N.m) @ 1600 rpm	0.348 lb/hp-hr (212 g/kWh) @ 2100 rpm	Air-to-air
*BSFC - Brake specific fuel consumption - definition

Generator Set Engine Ratings
Engine Model	Emission Certified	Rated RPM	Engine Power Prime		Prime Ratings		Engine Power Intermittent		Intermittent Ratings
Engine Model	Emission Certified		kWm	hp	kVA	kWe	kWm	hp	kVA	kWe
6125A	Tier 1	1800	254	341	264-276	211-221	280	375	291-305	233-244
6125A	Tier 1	1800	273	366	284-296	227-237	300	402	314-327	251-262
6125A	Tier 1	1800	300	402	311-326	249-261	330	442	341-360	275-288
6125H	Tier 2	1800	300	402	312-326	249-261	330	442	345-361	276-288
6125H	Tier 2	1800	327	439	340-356	272-285	360	483	376-394	301-315
6125H	Tier 2	1800	382	512	397-415	318-332	420	563	439-459	351-367
6125H	Tier 2	1800	382	512	397-415	318-332	460	617	481-503	385-402
Generator ratings explained 1500 RPM / 50hz ratings available on request.

Engine dimensions
Engine Model	Cylinders	Displacement	Length		Width		Height		Weight
Engine Model	Cylinders	Displacement	mm	in	mm	in	mm	in	kg	lb
6125A	6	12.5 L (766 cu.in)	1326	52.2	741	29.2	1224	48.2	1216	2675
6125H	6	12.5 L (766 cu.in)	1326	52.2	808	31.8	1239	48.8	1205	2657
Dimensions are based on engine with “standard configuration" including flywheel, flywheel housing, and electronics. Actual numbers may vary depending on selected options.

Updated October 2006