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Fuel Pumps:  Lycoming.

Product Description | Application Guide | Parts Description

Product Description
The Early Model Lycoming Fuel Pump
(40174/40295 low pressure, 40595 medium pressure, 40296 high pressure)
In the spring of 1964, AC introduced the first dual diaphragm type fuel pumps. These pumps were the first models to incorporate the oil seal integral with the upper diaphragm and a separator ring for installation of the vent / overboard drain line. These pumps are characterized by a rocker arm which is an early riveted, laminated design. Current production in Lycoming pumps will not fit some pre-1978 applications without expensive modifications. You can eliminate the need for these modifications by ordering an FAA Approved overhauled early model pump for direct replacement.

The Late Model Lycoming Fuel Pump
During August of 1978, AC introduced what is now known as the "late model" fuel pump which has a "channeled" rocker arm. This pump is taller than the early laminated arm pump and has a unitized diaphragm assembly. Because of its increased size some pre-1978 model aircraft require expensive and time consuming modifications to carburetors or accessory housings (ref: Lycoming Service Inst. No. 1110C). These modifications are not required if our smaller, early model laminated fuel pumps are installed on your aircraft.


Application Guide
Browse the Lycoming Application Guide to find the correct pump for your plane model.


Parts Description

LYCOMING PUMP PARTS DESCRIPTION
Part Number Description
40174 1/4 NPT Ports Low Pressure 4 ~ 6 psi
Laminated Actuating Arm
40295 Low Pressure 4 ~ 6 psi
Laminated Actuating Arm
40296 High Pressure 24 ~ 30 psi
Laminated Actuating Arm
40595 Medium Pressure 15 psi
Laminated Actuating Arm (PS5 TYPE)
41234 High Pressure 24 ~ 30 psi
41270 Low Pressure 4 ~ 6 psi
Long Actuating Arm
41271 Low Pressure 4 ~ 6 psi
41272 Medium Pressure 15 psi (PS5 TYPE)
41452 Low Pressure 4 ~ 6 psi
Ports Rotated 45 degrees
41617 Low Pressure 4 ~ 6 psi
(Ports Reversed)
41812 High Pressure 30 ~ 36 psi
Long Actuating Arm
75246 Low Pressure 4 ~ 6 psi
Laminated Actuating Arm
75247 High Pressure 24 ~ 30 psi
Laminated Actuating Arm
LW14282 Medium Pressure 15 psi (PS5 TYPE)
LW15399 Low Pressure 4 ~ 6 psi
Long Actuating Arm
LW15472 Low Pressure 4 ~ 6 psi
LW15473 High Pressure 24 ~ 30 psi
LW16335 Low Pressure 4 ~ 6 psi
Ports Rotated 45 degree
LW16775 Low Pressure 4 ~ 6 psi
(Ports Reversed)
LW16947 High Pressure 30 ~ 36 psi
Long Actuating Arm

Product Description | Application Guide | Parts Description

 

Fuel Pumps.
Lycoming.
Rayjay.
Continental.

Aero Accessories logo. Aero Accessories, Inc.
1240 Springwood Church Road
Gibsonville, NC 27249
USA
Toll Free: 1-(800)-822-3200
Phone: 1-(336)-449-5054
Fax: 1-(336)-449-5461

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