Overview / Description

Genuine Cummins 5260632 Fuel Transfer Pump (electric lift pump, 12V). This pump draws diesel fuel from the tank and delivers it through the lines and filtration to the engine's high-pressure fuel system, maintaining consistent low-pressure fuel supply for combustion, priming and fuel-system cooling/lubrication. Cummins catalogs this pump as used primarily on EPA13 8.9 liter ISC/ISL engines, with distributor catalogs listing it across B-Series, C-Series and L-Series platforms.

Calfrac SKU 5260632CUM. Manufacturer Part Number 5260632.

Key Features

• Genuine Cummins electric fuel transfer / lift pump, part number 5260632
• 12 volt DC electric operation
• Low-pressure stage component: primes the fuel system and feeds the high-pressure pump
• Cataloged supersession for earlier Cummins lift pump numbers 3968188 and 3955116
• Bill of materials includes vibration isolator part number 3955114
• Built to Cummins engineering specification for heavy-duty on-highway, industrial, construction and marine diesel service
• Helps prevent fuel starvation, hard starting and high-pressure pump/injector damage caused by inadequate supply pressure

Applications / Compatibility

Cummins states this pump is used primarily on EPA13 8.9 liter ISC/ISL engines. Distributor catalog compatibility listings include:

• ISB Series: ISB CM850
• QSB Series: QSB4.5 CM850 (CM2850), QSB5.9 CM850, QSB6.7 CM850 (CM2850), QSB6.7 M CM2250
• QSC Series: QSC8.3 CM850 (CM2850), QSC9 CM2250
• ISC Series: ISC CM850, ISC CM2150, ISC8.3 CM2250
• ISL Series: ISL CM2150, ISL9 CM2150 SN, ISL9 CM2250
• QSL Series: QSL8.9 CM2150 L141, QSL9 CM850 (CM2850), QSL9 CM2250, QSL9 CM2350 L102
• Distributor listings also reference Cummins 3.9L, 4.5L, 5.9L and 8.3L B/C series and ISB 6.7 applications

Model-year coverage: Not Available. Confirm fitment using your engine serial number (ESN) and CPL.

Cross-References / Part Interchanges

Supersession (cataloged)

• Cummins 3968188 (superseded by 5260632)
• Cummins 3955116 (superseded by 5260632)

Aftermarket Equivalent

• PAI Industries 180122

Marketplace-Listed Interchange / Unverified

• Cummins 3968187
• Cummins 3968190
• Cummins 4937766
• Cummins 5260634
• Cummins 4997021

Related component

• Cummins 3955114 - vibration isolator (listed in the 5260632 bill of materials)

Technical Data / Specifications

Product Type	Fuel Transfer Pump / Electric Lift Pump
Manufacturer	Cummins Inc.
Voltage	12 V DC
Drive Type	Electric
Fuel Type	Diesel
Fuel System Stage	Low pressure (tank to high-pressure pump)
Package Dimensions	7.85 x 2.4 x 2.3 in (distributor catalog)
Weight	1.61 lb (distributor catalog); 0.765 lb shipment weight (Cummins)
Flow Rate	Not Available
Outlet Pressure	Not Available
Current Draw	Not Available
Port / Thread Size	Not Available
Connector Type	Not Available
Mounting	Bracket mount with vibration isolator 3955114
Body Material	Not Available
Operating Temperature Range	Not Available
Standards / Certifications	Not Available

Identifiers and Additional Information

Manufacturer Part Number	5260632
Calfrac SKU	5260632CUM
Alternate Number Format	5260632 CUM
OEM Description	PUMP, FUEL TRANSFER
VMRS Code	044-003-001 - Pump, Fuel Transfer (System 044 Fuel System / Assembly 003 Fuel Pump)
Superseded Numbers	3968188, 3955116
Aftermarket Number	PAI 180122
UPC / GTIN	Not Available
Country of Origin	Not Available
Related Part	3955114 vibration isolator

Buyer Note

Please compare part numbers carefully before purchase. Buyers are responsible for independently verifying fitment, dimensions, ports, electrical connector, mounting arrangement, and engine serial number (ESN) or CPL for their specific application. Cummins part coverage varies by engine family, control module and build date. Contact us with your ESN if you would like assistance confirming the application before you buy.

Condition

All items sold by our store are new, unused, and have been stored indoors in a controlled warehouse environment. The majority of our parts are genuine OEM components sourced from surplus inventory and have never been installed or placed into service.

Please note that packaging condition may vary due to warehouse storage, handling, age, or inventory consolidation. Original manufacturer's packaging may show signs of wear such as scuffs, tears, labels, markings, tape residue, dust, or discoloration. In some cases, items may be repackaged for storage or shipping purposes.

While the external packaging may not be in perfect condition, the part itself remains new and unused unless otherwise stated in the listing. Customers should review all listing photos carefully, as the item shown is representative of the actual product being sold. If you have any questions regarding item condition, packaging, compatibility, or specifications, please contact us prior to purchase.