TF600-52 Main Gear Fuel Pump - Eaton

Main Gear Fuel Pumps

Table of Contents

For over 50 years Eaton has been the leading manufacturer of highly reliable main engine fuel pumps. These main engine
fuel pumps are highly designed, precision mechanical pumps, mounted to the aircraft’s engines that maintain the flow of
fuel to the engine at a precise rate and pressure. Eaton’s main engine fuel pumps are installed on 70% of the commercial
jet engines currently flying today. They are utilized on military, commercial, regional and business aircraft engines worldwide.

Models 704300,708300, 708400, 708600, 714900 3
Model 724400 4
Model 828300 5
Model 828500 6
Model 838000 7
Model 721400 8
Model 830800 9
Model 830100 10
Model 825500 11
Model 723300 12
Model 829500 13
Models 828200, 831000 14
Model 715200 15
Models 373400, 382400, 389400, 705300, 705400, 705500, 706800,71500 16
Models 386900, 390600, 720500, 720600 833700, 83800 17
Models 243600, 358200, 371900, 378200, 835800 18
Models 384300, 835900 19

MAIN FUEL GEAR PUMP – 1000 PSIG @ 6000 RPM

704300, 708300, 708400, 708600, 714900

PERFORMANCE SPECIFICATIONS APPLICATIONS
• CFM56-2, CFM56-2A,
OPERATING CHARACTERISTICS CFM 56-2B
• CFM56-3, CFM56-3B,
Speed 6000 RPM CFM56-3C
• CFM56-5, CFM56-5A,
Inlet Pressure 30 psig (138 kPag)
CFM56-5B, CFM56-5C
Boost Stage 140 psid (965 kPag)
Pressure Rise

Model shown 708600 Discharge Pressure 1000 psig (6895 kPag)

This series of gear fuel pumps Fuel Flow Rate 58 gpm (220l/min)
contain a centrifugal boost
stage, fuel filter, and gear stage. CRANKING CHARACTERISTICS
Fuel supplied by the aircraft
boost pump enters the boost Speed 625 RPM
stage, which increases pressure
125 psi (862 kPa). This pressure Inlet Pressure 30 psig (207 kPag)
forces heated and filtered fuel
through internal passages to Discharge Pressure 305 psig (2103 kPag)
the gear stage. Fuel is directed
to the fuel control where it is Fuel Flow Rate 5.0 gpm (18.9l/min)
re-filtered and returned to the
fuel control. Rotation Clockwise

Weight 44 pounds (19.95 kg)

Model shown 708600

3 EATON CORPORATION Aerospace TF600-52 November 2008

MAIN FUEL GEAR PUMP – 1145 PSIG @ 6250 RPM

724400

PERFORMANCE SPECIFICATIONS APPLICATIONS

OPERATING CHARACTERISTICS • CFM56-5B

• CFM56-5C

Speed 6250 RPM

Inlet Pressure 30 psig (207 kPag)

Boost Stage 140 psid (965 kPad)
Pressure Rise

Model shown 724400 Discharge Pressure 1145 psig (7895 kPag)

Eaton’s 724400 model gear fuel Fuel Flow Rate 65.3 gpm (247 l/min)
pump contains a centrifugal
boost stage, fuel filter and gear Main Inlet Filter 40 micron nominal/80 micron absolute
stage. Fuel supplied by the (Disposable)
aircraft boost pump enters the
boost stage, which increases CRANKING CHARACTERISTICS
pressure. This pressure forces
heated and filtered fuel through Speed (RPM) 625 RPM
internal passages to the gear
stage. Fuel is directed to the Inlet Pressure 30 psig (207 kPag)
fuel control system where it is
re-filtered and returned to the Discharge Pressure 305 psig (2103 kPag)
aircraft pump.
Fuel Flow 5.0 gpm (18.9 l/min)

Rotation Clockwise

Weight 45.75 pounds (20.76 kg)

Model shown 724400

4 EATON CORPORATION Aerospace TF600-52 November 2008

MAIN FUEL GEAR PUMP – 1145 PSIG @ 6250 RPM

828300

PERFORMANCE SPECIFICATIONS APPLICATIONS
• CFM56-7B
OPERATING CHARACTERISTICS

Speed 6250 RPM

Inlet Pressure 30 psig (207 kPag)

Boost Stage 110 psid (758 kPad)
Pressure Rise

Model shown 828300 Discharge Pressure 1145 psig (7895 kPag)

Fuel supplied by the aircraft Fuel Flow Rate 65 gpm (246 l/min)
boost pump enters the fuel
pump boost stage, which CRANKING CHARACTERISTICS
increases pressure. Boost stage
output flows through a cooler, Speed (RPM) 625 RPM
main heat exchanger, and the
pump fuel filter and then into Inlet Pressure 30 psig (207 kPag)
the high-pressure gear stage.
Bypass flow from the fuel Discharge Pressure 305 psig (2100 kPag)
control joins the boost stage
discharge and re-enters the gear Fuel Flow 5.9 gpm (22.3 l/min)
stage. A high-pressure relief
valve permits the entire pump Rotation Clockwise
discharge flow to return to the
gear stage inlet. This limits gear Weight 48.4 pounds (22 kg)
stage pressure.

Model shown 828300

5 EATON CORPORATION Aerospace TF600-52 November 2008

MAIN FUEL GEAR PUMP – 1600 PSIG @ 7380 RPM

828500

PERFORMANCE SPECIFICATIONS APPLICATIONS
• GE 90-76B, GE 90-77B
OPERATING CHARACTERISTICS • GE 90-85B
• GE 90-90B
Speed 7603 RPM • GE 90-92B
• GE 90-94B
Inlet Pressure 15 psig (103 kPag)

Discharge Pressure 1600 psig (11032 kPag)

Fuel Flow Rate 113.2 gpm (429 l/min)

CRANKING CHARACTERISTICS

Speed (RPM) 455 RPM

Model shown 828500 Inlet Pressure 15 psig (103 kPag)

Eaton’s 828500 model pump Discharge Pressure 165 psig (1138 kPag)
inlet feeds into the centrifugal
boost stage, which raises the Fuel Flow 5.95 gpm (22.5 l/min)
pressure of the fuel. Discharge
from the boost stage mixes Rotation Clockwise
with returned fuel from the fuel
control and is filtered before Weight 62.2 pounds (28.2 kg)
entering the high-pressure gear
stage, which forces the fuel
through heat exchangers. The
fuel re-enters the pump through
the main fuel filter and servo
wash fuel filter assemblies and
into the hydro-mechanical unit
(HMU). The HMU measures
fuel flow and returns unused
fuel and servo discharge to the
pump bypass return port.

Model shown 828500

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MAIN FUEL GEAR PUMP – 1700 PSIG @ 7863 RPM

838000

PERFORMANCE SPECIFICATIONS APPLICATIONS
• GE 90-112B
OPERATING CHARACTERISTICS • GE 90-115B

Speed 7863 RPM

Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 1700 psig (11722 kPag)

Fuel Flow Rate 157.1 gpm (595 l/min)

Model shown 838000 PERFORMANCE SPECIFICATIONS CRANKING CHARACTERISTICS

The pump inlet feeds into the Speed (RPM) 455 RPM
centrifugal boost stage, which
raises the pressure of the Inlet Pressure 20 psig (138 kPag)
fuel. Discharge from the boost
stage mixes with returned Discharge Pressure 305 psig (2103 kPag)
fuel from the fuel control and
is filtered before entering the Fuel Flow 6.2 gpm (23.5 l/min)
high-pressure gear stage which
forces the fuel through heat Rotation Clockwise
exchangers. The fuel re-enters
the pump through the main fuel Weight 70.2 pounds (31.8 kg)
filter and servo wash fuel filter
assemblies and then into the
hydromechanical unit (HMU).
The HMU measures fuel flow
and returns unused fuel and
servo discharge to the pump
bypass return port.

Model shown 838000

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MAIN FUEL GEAR PUMP – 1630 PSIG @ 6841 RPM

721400

PERFORMANCE SPECIFICATIONS APPLICATIONS
• Trent 768 and Trent 772
OPERATING CHARACTERISTICS • Trent 877, Trent 884,
Trent 892 and Trent 892B
Speed 6841 RPM

Inlet Pressure 20 psig (138 kPad)

Model shown 721400 Boost Stage 160 psid (1103 kPag)
Pressure Rise
Eaton’s 721400 gear fuel pump
couples a high-pressure gear Discharge Pressure 1630 psig (11239 kPag)
pump with an intermediate-
pressure centrifugal boost Fuel Flow Rate 115 gpm (435 l/min)
pump. Low-pressure fuel
leaves the pump outlet and CRANKING CHARACTERISTICS
re-enters at the high-pressure
pump inlet port. The gear stage Speed (RPM) 435 RPM
high-pressure fuel is discharged
to the fuel metering unit (FMU). Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 305 psig (2103 kPag)

Fuel Flow 4.7 gpm (17.8 l/min)

Rotation Counterclockwise

Weight 49 pounds (22.23 kg)

Model shown 721400

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MAIN FUEL GEAR PUMP – 20 PSIG @ 7088 RPM

830800

PERFORMANCE SPECIFICATIONS APPLICATIONS
• Trent 895
OPERATING CHARACTERISTICS

Speed 7088 RPM

Inlet Pressure 20 psig (138 kPag)

Boost Stage 140 psid (965 kPad)
Pressure Rise
Model shown 830800
Discharge Pressure 1731 psig (11935 kPag)
The gear fuel pump couples
a high-pressure gear pump Fuel Flow Rate 126.5 gpm (48,576 phr) (479 l/min)
with an intermediate-pressure
centrifugal boost pump. Low- CRANKING CHARACTERISTICS
pressure fuel leaves the pump
outlet and then re-enters at the Speed (RPM) 435 RPM
high-pressure pump inlet port.
The gear stage increases the Inlet Pressure 20 psig (138 kPag)
fuel pressure, and the high-
pressure fuel is discharged to Discharge Pressure 310 psig (2137 kPag)
the fuel metering unit (FMU).
Fuel Flow 3.8 gpm (1459 phr) (14.4 l/min)

Rotation Counterclockwise

Weight 53.5 pounds (24.27 kg)

Model shown 830800

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MAIN FUEL GEAR PUMP – 1210 PSIG @ 6228 RPM

830100

PERFORMANCE SPECIFICATIONS APPLICATIONS
• RB211-535
OPERATING CHARACTERISTICS

Speed 6228 RPM

Inlet Pressure 130 psig (896.32 kPag)

Discharge Pressure 1210 psig (8343 kPag)

Fuel Flow Rate 81 gpm (27.6 l/min)

Model shown 830100 CRANKING CHARACTERISTICS

Eaton’s main gear fuel pump Speed (RPM) 777 RPM
consists of a high pressure
gear stage and fuel flow relief Inlet Pressure 30 psig (207 kPag)
valve. This pump is mounted
to the engine with a V-band Discharge Pressure 350 psig (2413 kPag)
clamp, providing fuel inlet, high
pressure outlet, spill return and Fuel Flow 8.8 gpm (33.3 l/min)
pressure sensing. Fuel supplied
to the pump is pressurized by Rotation Counterclockwise
a separate, engine-driven low-
pressure fuel pump. Weight 21.5 pounds (9.8 kg)

Model shown 830100

10 EATON CORPORATION Aerospace TF600-52 November 2008

MAIN FUEL GEAR PUMP – 1235 PSIG @ 6580 RPM

825500

PERFORMANCE SPECIFICATIONS APPLICATIONS
• PW 4050
OPERATING CHARACTERISTICS • PW 4052
• PW 4056
Speed 6580 RPM • PW 4060, PW 4060A
• PW 4060C
Inlet Pressure 20 psig (138 kPag) • PW 4152
• PW 4156, PW 4156A
Boost Stage 160 psid (1103 kPad) • PW 4158
Pressure Rise • PW 4460
• PW 4462
Discharge Pressure 1235 psig (8515 kPag)

Model shown 825500 Fuel Flow Rate 97 gpm (367 l/min)

Fuel enters the pump at a pres- Main Inlet Filter 40 micron nominal/80 micron absolute
sure of approximately (Disposable)
20 psi (138 kPa) from the air-
craft booster pump. The centrif- CRANKING CHARACTERISTICS
ugal boost stage raises the fuel
pressure and forces heated and Speed (RPM) 665 RPM
filtered fuel through the gear
housing to the high-pressure Inlet Pressure 20 psig (138 kPag)
gear stage. The high-pressure
gear stage discharges fuel to Discharge Pressure 320 psig (8446 kPag)
the fuel monitoring unit (FMU).
Fuel is ported back to the pump Fuel Flow 8 gpm (30.2 l/min)
through the heat exchanger, re-
filtered and returned to the FMU. Rotation Clockwise

Weight 50 pounds (22.76 kg)

Model shown 825500

11 EATON CORPORATION Aerospace TF600-52 November 2008

MAIN FUEL GEAR PUMP – 1355 PSIG @ 7145 RPM

723300

PERFORMANCE SPECIFICATIONS APPLICATIONS
• PW4164
OPERATING CHARACTERISTICS • PW4168
• PW4074
Speed 7145 RPM • PW4077
• PW4084
Inlet Pressure 20 psig (138 kPag)

Model shown 723300 Boost Stage 200 psid (1379 kPad)
Pressure Rise
Fuel enters the pump at a
pressure of approximately 20 Discharge Pressure 1355 psig (9342 kPag)
psi (138 kPa) from the aircraft
booster pump. The centrifugal Fuel Flow Rate 115 gpm (437 l/min)
boost stage raises the fuel
pressure and forces heated and Main Inlet Filter 40 micron nominal/80 micron absolute
filtered fuel through the gear (Disposable)
housing to the high-pressure
gear stage. The high-pressure CRANKING CHARACTERISTICS
gear stage discharges fuel to
the fuel monitoring unit (FMU). Speed (RPM) 686 RPM
Fuel is ported back to the pump
through the heat exchanger, re- Inlet Pressure 20 psig (138 kPag)
filtered, and returned to the FMU.
Discharge Pressure 320 psig (2206 kPag)

Fuel Flow 9.2 gpm (34.8 l/min)

Rotation Clockwise

Weight 52 pounds (23.6 kg)

Model shown 723300

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MAIN FUEL GEAR PUMP – 800 PSIG @ 8319 RPM

829500

PERFORMANCE SPECIFICATIONS APPLICATIONS
• CF34-8C
OPERATING CHARACTERISTICS • CF34-8E

Speed 8319 RPM

Inlet Pressure 20 psig (138 kPag)

Main Stage 800 psig (5516 kPag)

Discharge Pressure

Model shown 829500 Motive Stage 700 psig (4826 kPag)
Discharge
Eaton’s 829500 model pump
inlet feeds into the centrifugal Fuel Flow Rate 28.5 gpm (108 l/min)
boost stage, which raises the (Main Stage)
pressure of the fuel. Discharge
from the boost stage mixes Fuel Flow Rate 14.7 gpm (56 l/min)
with returned fuel from the fuel (Motive Stage)
control and is filtered before
entering the high-pressure gear Boost Stage Wash 45 micron absolute
stage, which forces the fuel Flow Filter
through heat exchangers. The
fuel re-enters the pump and OBV Wash 60 micron absolute
flows through the main fuel Flow Filter
filter and servo wash fuel filter
assemblies and into the hydro- CRANKING CHARACTERISTICS
mechanical unit (HMU). The
HMU measures fuel flow and Speed (RPM) 624 RPM
returns the remaining unused
fuel and servo discharge to the Inlet Pressure 20 psig (138 kPag)
pump bypass return port.
Main Stage 185 psig (1276 kPag)

Discharge Pressure

Fuel Flow 1.7 gpm (6.4 l/min)

Rotation Counterclockwise

Model shown 829500

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MAIN FUEL GEAR PUMP – 1350 PSIG @ 8400 RPM

828200, 831000

PERFORMANCE SPECIFICATIONS APPLICATIONS
• BR710
OPERATING CHARACTERISTICS • BR715

Speed 8400 RPM

Inlet Pressure 30 psig (207 kPag)

Model shown 831000 Boost Stage 150 psid (1034 kPad)
Pressure Rise
Eaton’s main gear fuel pump
consists of a high pressure gear Discharge Pressure 1350 psig (9315 kPag)
stage, centrifugal boost stage
and full flow relief valve. This Fuel Flow Rate 43 gpm (162 l/min)
pump is mounted to the engine
with a V-band clamp, provid- CRANKING CHARACTERISTICS
ing fuel inlet, high pressure
outlet, spill return and pressure- Speed (RPM) 657 RPM
sensing.
Inlet Pressure 30 psig (207 kPag)

Discharge Pressure 275 psig (1898 kPag)

Fuel Flow 2.8 gpm (10.6 l/min)

Rotation Counterclockwise

Weight 20.3 pounds (9.2 kg)

Model 831000

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APU FUEL GEAR PUMP – 665 PSIG @ 4200 RPM

715200

PERFORMANCE SPECIFICATIONS APPLICATIONS
• PW901A

OPERATING CHARACTERISTICS

Speed 4200 RPM

Inlet Pressure 15 psig (104 kPag)

Model shown 715200 Discharge Pressure 665 psig (4585 kPag)

Fuel enters at the inlet port and Fuel Flow Rate 9.8 gpm (37.1 l/min)
is pressurized by the centrifugal
boost stage. From there, it is Main Inlet Filter 10 micron nominal
routed through the 74 micron (Disposable)
inlet screen, pressurized by the
gear stage and delivered to a CRANKING CHARACTERISTICS
discharge port through the 10
micron filter element. Excess Speed (RPM) 250 RPM
fuel not required for engine con-
sumption re-enters the pump Inlet Pressure 15 psig (138 kPag)
from the fuel control through
the bypass return port. Discharge Pressure 100 psig (1138 kPag)

Fuel Flow Rate 0.34 gpm (1.29 l/min)

Rotation Counterclockwise

Weight 10.25 pounds (4.65 kg)

Model shown 715200

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MAIN FUEL GEAR PUMP – 1100 PSIG @ 6000 RPM

373400, 382400, 389400, 705300, 705400, 705500, 706800, 715000

PERFORMANCE SPECIFICATIONS APPLICATIONS
• JT9D-3A
OPERATING CHARACTERISTICS • JT9D-7, -7A, -7F, -7H,
-7AH, -7J
Speed 6,000 RPM • JT9D-7R4D, -7R4D1
• JT9D-7R4E, -7R4E1,
Inlet Pressure 20 psig (138 kPag) -7R4E4
• JT9D-7R4G2
Discharge Pressure 1100 psig (7584 kPag) • JT9D-7R4H1
(Main Stage)

Model shown 706800 Discharge Pressure 815 psi (5619 kPag)
(Hydraulic Stage)
Fuel enters the pump at a
pressure of approximately Fuel Flow 69 gpm (261 l/min)
20 psi (138 kPa) from the air- (Main Stage)
craft booster pump. The centrif-
ugal boost stage raises the fuel Fuel Flow 12.6 gpm (47.7 l/min)
pressure and forces heated and (Hydraulic Stage)
filtered fuel through the gear
housing to the high-pressure CRANKING CHARACTERISTICS
gear stage. Models 706800 and
715000 are equipped with an Speed 550 RPM
inlet port which permits heated
fuel into the system ahead of Inlet Pressure 20 psig (138 kPag)
the micronic filter to alleviate
the possibility of filter icing. Discharge Pressure 185 psig (1275 kPag)
(Main Stage)

Discharge Pressure 300 psig (2068 kPag)
(Hydraulic Stage)

Fuel Flow 5 gpm (18.9 l/min)
(Main Stage)

Fuel Flow 0.68 gpm (2.57 l/min)
(Hydraulic Stage)

Rotation Counterclockwise

Weight 47 pounds (21.3 kg)

Model shown 706800

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MAIN FUEL GEAR PUMP – 1100 PSIG @ 6000 RPM

386900, 390600, 720500, 720600, 833700, 833800

PERFORMANCE SPECIFICATIONS APPLICATIONS
• JT9D-59
OPERATING CHARACTERISTICS • JT9D-70
• JT9D-7Q
Speed 6,000 RPM

Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 1100 psig (7584 kPag)
(Main Stage)

Model shown 833700 Discharge Pressure 725 psi (4999 kPag)
(Hydraulic Stage)
Fuel enters the pump at a pres-
sure of approximately Fuel Flow 89 gpm (336 l/min)
20 psi (138 kPa) from the air- (Main Stage)
craft booster pump. The boost
stage raises the fuel pressure Fuel Flow 12.6 gpm (47.7 l/min)
and forces heated and filtered (Hydraulic Stage)
fuel through the gear housing
to the main and hydraulic stage CRANKING CHARACTERISTICS
gear pumps. Fuel is ported back
to the pump through the heat Speed 650 RPM
exchanger, is refiltered and then
returned to the FMU. Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 185 psig (1275 kPag)
(Main Stage)

Discharge Pressure 300 psig (2068 kPag)
(Hydraulic Stage)

Fuel Flow 5 gpm (18.9 l/min)
(Main Stage)

Fuel Flow 0.8 gpm (3.03 l/min)
(Hydraulic Stage)

Rotation Counterclockwise

Weight 74 pounds (33.6 kg)

Model shown 833700

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MAIN FUEL GEAR PUMP – 900 PSIG @ 4200 RPM

243600, 358200, 378200, 371900, 835800

PERFORMANCE SPECIFICATIONS APPLICATIONS
• JT8D-1, -1A, -1B
OPERATING CHARACTERISTICS • JT8D-7, -7A
• JT8D-9, -9A
Speed 4200 RPM • JT8D-11
• JT8D-15, -15A
Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 900 psig (6205 kPag)

Model shown 835800 Fuel Flow Rate Models 243600, 358200, 371900 = 34 gpm (129 l/min)
Models 378200, 835800 = 36.4 gpm (138 l/min)
A single element gear stage
paired with a high-speed cen- CRANKING CHARACTERISTICS
trifugal boost with relief valve
limits the pressure rise across Speed (RPM) 550 RPM
the gear stage. A replaceable
micronic barrier filter element is Inlet Pressure 20 psig (138 kPag)
located between the discharge
of the centrifugal stage and Discharge Pressure 150 psig (1034 kPag)
the inlet of the gear stage. The
removable pump cover houses Fuel Flow Rate Models 243600, 358200, 371900 = 3.59 (13.6 l/min)
a plug-type valve for sump and Models 378200, 835800 = 4.1 gpm (15.5 l/min)
center filter draining. Outlet
and return ports are provided Rotation Counterclockwise
between the boost stage
discharge and the filter inlet for Weight 28 pounds (12.7 kg)
installation of an external fuel
heater.

Model shown 835800

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MAIN FUEL GEAR PUMP – 1000 PSIG @ 4200 RPM

384300, 835900

PERFORMANCE SPECIFICATIONS APPLICATIONS
• JT8D-17, -17A, -17AR, -17R
OPERATING CHARACTERISTICS • JT8D-209
• JT8D-219
Speed 4200 RPM

Inlet Pressure 20 psig (138 kPag)

Discharge Pressure 1000 psig (6895 kPag)

Model shown 835900 Fuel Flow Rate 43.5 gpm (165 l/min)

A single element gear stage CRANKING CHARACTERISTICS
paired with a high-speed cen-
trifugal boost with relief valve Speed (RPM) 550 RPM
limits the pressure rise across
the gear stage. A replaceable Inlet Pressure 20 psig (138 kPag)
micronic barrier filter element is
located between the discharge Discharge Pressure 165 psig (1138 kPag)
of the centrifugal stage and
the inlet of the gear stage. The Fuel Flow Rate 4.3 (16.3 l/min)
removable pump cover houses
a plug-type valve for sump and Rotation Counterclockwise
center filter draining. Outlet
and return ports are provided Weight 33 pounds (15 kg)
between the boost stage
discharge and the filter inlet for
installation of an external fuel
heater.

Model shown 835900

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