Deutz BF4M1011F Specifications
| Engine Model: Deutz BF4M1011F |
| Engine Type: 4-stroke 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 177.5 cu.in (2.91 L) |
| Rated Engine Power: 75-82 Hp (56-61 kW) at 2800 rpm |
| Fuel System Type: Direct injection |
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The Deutz BF4M1011F is a compact, turbocharged,
liquid-cooled diesel engine from the 1011 family, widely recognized for
its reliability and efficiency in construction, agricultural, and
industrial applications. This 4-cylinder inline engine employs direct
injection technology to achieve optimal fuel combustion with reduced
emissions. The BF4M1011F is notable for its compact design, which
facilitates installation in confined engine compartments of loaders,
excavators, compactors, and agricultural tractors. The engine meets IMO
Tier 2 emission standards, making it suitable for marine auxiliary
applications as well.
Operators value the engine for its robust cast-iron construction,
straightforward maintenance access with all service points located on
one side, and the extended belt change intervals characteristic of the
1011 series. Deutz air-cooled heritage is not present here; instead, the
BF4M1011F uses a liquid-cooling system with an integrated heat
exchanger, ensuring stable operating temperatures under variable loads.
The engine forms the powerplant for various compact construction
equipment, including Bobcat skid-steer loaders (models 863, 873) and
Hamm vibratory compactors.
Engine Type: 4-cycle, in-line, 4-cylinder, turbocharged diesel.
Displacement: 2.91 Liters (177.5 cu.in).
Bore and Stroke: 91 mm x 112 mm (3.58 in x 4.41 in).
Combustion System: Direct injection.
Aspiration: Turbocharged without intercooler.
Rated Power: 56-61 kW (75-82 HP) at 2,800 rpm.
Maximum Torque: 203 Nm (150 lb-ft) at 1,800 rpm.
Governed Speed: 2,800 rpm (rated).
Governed Speed: 2,650 rpm (max power for some equipments).
Idle Speed: 800-850 rpm.
Compression Ratio: 17.0:1.
Firing Order: 1-3-4-2.
Emission Compliance: IMO Tier II compliant for marine applications.
The cylinder block is constructed from high-grade cast iron with an
open-deck design providing structural rigidity for the 4-cylinder
configuration. The block incorporates integrated cooling water jackets
surrounding each cylinder bore to dissipate combustion heat efficiently.
No replaceable cylinder liners are used; the bores are machined directly
into the block, then induction-hardened or plateau-honed to provide a
durable wear surface for the piston rings.
The deep-skirt crankcase extends below the crankshaft centerline,
enhancing block stiffness and reducing vibration transmission to the
mounting points. The block features five main bearing bulkheads with
two-bolt caps, providing adequate crankshaft support for the 112 mm
stroke. A gear train housing is cast into the front of the block,
housing the camshaft drive gears and accessory drives for the injection
pump.
The oil gallery is cast into the block wall, distributing pressurized
lubricant from the pump to the main bearings and camshaft bearings. The
block incorporates mounting points for the water pump, oil filter
housing, and starter motor. All service access points, including the oil
dipstick and filter, are grouped on one side of the block to facilitate
maintenance in constrained equipment compartments.
The cylinder head is a single-piece cross-flow cast-iron design with
overhead valve configuration. The intake ports are located on one side
of the head, with exhaust ports on the opposite side, minimizing heat
transfer between incoming air and outgoing exhaust gases. Each cylinder
utilizes four valves: two intake and two exhaust, arranged in a parallel
valve layout. The multi-valve design enhances volumetric efficiency and
improves breathing at higher engine speeds up to 2,800 rpm.
Valve diameters are optimized for the 91 mm bore, with intake valves
measuring 34 mm and exhaust valves 30 mm. Valves are manufactured from
heat-resistant steel alloys, with exhaust valves featuring
Stellite-faced seating surfaces. The overhead camshaft is not present;
instead, the engine uses a side-mounted camshaft within the block,
driving pushrods and rocker arms to actuate the valves.
Valve clearances are adjustable via screw-and-locknut adjusters at the
rocker arm. Intake valve clearance specification: 0.20 mm (0.008 in)
cold. Exhaust valve clearance specification: 0.30 mm (0.012 in) cold.
The cylinder head gasket is a multilayer steel design with embossed
sealing beads around each cylinder bore. Glow plugs are installed in
each cylinder to assist cold starting at ambient temperatures below 0°C
(32°F), preheating the combustion chamber before cranking.
The fuel system utilizes a direct injection configuration with a
mechanical in-line injection pump. The pump is mounted to the engine
gear train housing and driven by the camshaft gear. The pump uses four
independent plunger and barrel assemblies, each delivering high-pressure
fuel to individual injectors. Injection timing is fixed and adjustable
via shims between the pump flange and mounting surface.
Fuel injection pressure reaches approximately 250-300 bar (3,625-4,350
psi) at rated speed. The injectors are multi-hole nozzle types
(typically 5 holes) installed directly into the cylinder head, with
nozzle tips projecting into the combustion chamber. Injector opening
pressure is factory-set and should be checked during overhaul. A
mechanical centrifugal governor, integrated into the injection pump,
provides speed regulation across the load range.
The governor maintains stable engine speed from idle to maximum rated
2,800 rpm. A manual stop lever allows fuel shutoff for engine shutdown.
The fuel system includes a primary fuel filter with water separator, a
secondary spin-on fuel filter, and a hand-priming pump on the filter
head to bleed air after filter changes. Fuel consumption at rated power
is 16-18 L/h (4.2-4.8 US Gal/h) under full load.
The lubrication system employs a forced-feed design using a gear-type
oil pump mounted to the front of the crankshaft. The pump draws oil from
the sump through a suction strainer, then delivers it through a
full-flow spin-on oil filter before entering the main oil gallery. Oil
filter filtration rating is 15 microns absolute. A spring-loaded
pressure relief valve in the pump housing maintains main gallery
pressure between 3.5 and 5.0 bar (50-72 psi) at rated speed.
Warm idle oil pressure is not less than 1.0 bar (15 psi). The oil pan is
a pressed steel construction with baffles to prevent oil starvation
under inclination. Total oil capacity including filter is 10.5 Liters
(11.0 US Qts). Piston cooling jets are not present in this engine
design, as thermal loads are managed through the liquid cooling system
and turbocharger.
Oil specification requires API service classification CF or higher, with
SAE viscosity 15W-40 for general operating conditions. SAE 10W-30 is
permissible for ambient temperatures below -10°C (14°F). Oil change
interval: 500 operating hours under normal conditions, reduced to 50
hours for initial fill during break-in. The cooling system capacity is
13 Liters (3.4 US Gal) including radiator and heater circuit.
The cooling system is liquid-cooled using a belt-driven centrifugal
water pump circulating coolant through the cylinder block, cylinder
head, and an external radiator or heat exchanger. For marine
applications, the engine is supplied with an integrated heat exchanger
using seawater for heat rejection. A wax-pellet thermostat located in
the coolant outlet housing maintains operating temperature between 80°C
and 90°C (176°F to 194°F), with full opening at 88°C (190°F).
A bypass circuit allows coolant circulation through the block during
warm-up before the thermostat opens. The coolant pump is mounted on the
front of the engine block, driven by a Poly-V serpentine belt. Belt
change intervals are extended compared to previous Deutz engine
generations. Coolant capacity for the engine alone (without radiator) is
13 Liters (3.4 US Gal) when including the heater circuit.
Ethylene-glycol antifreeze at 30-50 percent concentration is recommended
for corrosion protection and freeze prevention. A coolant expansion tank
with pressure cap rated at 1.0 bar (15 psi) maintains system
pressurization, raising the boiling point to 120°C (248°F). Coolant
change interval: 2,000 operating hours or 2 years.
The electrical system operates on 12 V DC for most industrial
applications, with a 2.5 kW starter motor equipped with solenoid
engagement. The alternator output is 65 A to 80 A, sufficient for
machine lighting, control systems, and battery charging. Glow plugs (12
V, 6 A each) are wired through a relay controlled by the ignition
switch, with a preheat duration of 5-10 seconds depending on ambient
temperature.
The air intake system includes a dry-type air filter with a replaceable
cellulose element, mounted remotely on the equipment. Intake air passes
through the filter, then through a rubber hose to the turbocharger
compressor inlet. The turbocharger is a wastegate-equipped unit that
limits boost pressure to approximately 0.8-1.0 bar (11.6-14.5 psi). No
charge air cooler (intercooler) is fitted to this engine version.
The exhaust system consists of a cast-iron exhaust manifold collecting
gases from all four cylinders, directing them into the turbocharger
turbine housing. After exiting the turbine, exhaust passes through a
flexible pipe to the silencer and outlet. Exhaust back pressure must not
exceed 5 kPa (0.7 psi) for optimal performance.
The starting system uses either electric key-start with
solenoid-actuated pinion engagement or, in some equipment
configurations, a manual start switch. Cold start assistance is provided
by the glow plugs and optionally by an intake air heater for extreme
cold conditions.
Dry weight (engine only, without starter, alternator, or turbocharger):
210 kg (463 lb).
Weight with standard accessories: 280-320 kg (617-705 lb) depending on
configuration.
Length: 630 mm (24.8 in) from front gear cover to flywheel housing face.
Width: 450 mm (17.7 in) across widest point including injection pump and
exhaust manifold.
Height: 700 mm (27.6 in) from oil pan bottom to valve cover top.
Oil and filter change interval: 500 operating hours under normal
conditions, 250 hours under severe duty (dusty environments, high
ambient temperatures). Initial oil change at 50 hours for new or rebuilt
engines. Valve clearance inspection interval: 1,000 operating hours.
Adjust if outside tolerances: intake 0.20 mm (0.008 in), exhaust 0.30 mm
(0.012 in) cold. Cooling system service: Coolant replacement every 2,000
hours or 2 years. Coolant capacity 13 Liters (3.4 US Gal).
Fuel filter replacement interval: 500 hours for primary and secondary
filters. Water separator draining required every 100 hours or when
indicated by sensor. Air filter element replacement: When restriction
indicator shows 25 inches water column or at 500-hour intervals, more
frequently in dusty conditions. Drive belt inspection: 500 hours. Check
for cracks, fraying, or glazing. Belt deflection 8-10 mm under 10 kg
force applied at mid-span.
Injector nozzle inspection: 2,000 hours with opening pressure
verification. Nozzle replacement recommended at 4,000 hours.
Turbocharger inspection: 2,000 hours. Check shaft axial play (limit 0.10
mm/0.004 in) and radial clearance (limit 0.15 mm/0.006 in). Glow plug
check: 1,000 hours. Measure resistance between terminal and body
(0.5-2.0 ohms). Replace if open circuit or short circuit.
Cylinder head bolts: 80 Nm (59 lb-ft).
Connecting rod cap nuts: 65 Nm (48 lb-ft).
Main bearing cap bolts: 100 Nm (74 lb-ft) for M12 fasteners.
Flywheel to crankshaft bolts: 120 Nm (89 lb-ft).
Flywheel housing to cylinder block: 45 Nm (33 lb-ft) for M10 fasteners.
Injection pump mounting nuts: 25 Nm (18 lb-ft).
Injector hold-down clamp nut: 70 Nm (52 lb-ft).
High-pressure fuel line nuts: 25 Nm (18 lb-ft).
Rocker arm shaft pedestal nuts: 35 Nm (26 lb-ft).
Valve cover nuts: 12 Nm (9 lb-ft).
Oil pan bolts: 15 Nm (11 lb-ft).
Water pump mounting bolts: t25 Nm (18 lb-ft).
Starter motor mounting bolts: 45 Nm (33 lb-ft).
Alternator mounting bolts (pivot bolt): 45 Nm (33 lb-ft).
Alternator mounting bolts (adjustment arm bolt): 25 Nm (18 lb-ft).
Turbocharger mounting nuts: 40 Nm (30 lb-ft).
Exhaust manifold nuts: 35 Nm (26 lb-ft).
Engine mounting feet to block: 60 Nm (44 lb-ft) for M12 studs.
Glow plug: 15 Nm (11 lb-ft).
The Deutz BF4M1011F engine serves as a power unit for a wide range of
compact construction, agricultural, and industrial equipment. Primary
applications include skid-steer loaders from multiple manufacturers;
specifically, the engine is a direct fit for Bobcat models 863 and 873.
The engine also appears in Bobcat 863 and 873 machines with vertical
lift front dump design, operating weight 3,341 kg (7,366 lb) and tip
capacity 2,132 kg (4,700 lb). Vibratory compactors, including the Hamm
3307 padfoot and DV/HD 70K series, use this engine rated at 81 HP. The
engine provides propulsion for scoop-type loaders and compact wheel
loaders.
In the agricultural sector, the BF4M1011F powers small to medium
tractors, self-propelled sprayers, and hay handling equipment. The
engine's compact dimensions (630 mm length, 450 mm width) facilitate
installation in articulated loaders and rough-terrain forklifts where
space is constrained. Marine applications include auxiliary power for
small workboats, fishing vessels, and generator sets, with the engine
certified to IMO Tier II standards.
The industrial engine also serves as a repower option for older
equipment originally fitted with Deutz 1011 series engines, with
remanufactured drop-in assemblies available for quick equipment
turnaround. Common aftermarket replacements include complete assemblies
including the block, cylinder head, injection pump, injectors, water
pump, oil pump, and all gaskets, allowing single-day installation to
minimize downtime.
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