Cummins 3914868 — Genuine Vacuum Pump Block-Off / Cover Plate

MPN: 3914868  |  Also Known As: vacuum pump delete plate, power steering pump block-off plate, accessory drive cover plate

Cleanly seal the vacuum-pump opening on your B-Series. The genuine Cummins 3914868 cover plate bolts to the front gear housing to block off the factory vacuum pump port on 1994–2002 Ram 2500/3500 5.9L applications when the pump is removed for custom builds. OE geometry and finish for a flat, leak-free seal.

Features & Benefits

• Direct-fit OE plate for the vacuum-pump opening in the front gear housing.
• Prevents oil leaks during vacuum-pump delete conversions.
• Flat, rigid stamping/casting maintains flange flatness under clamp load.
• Pairs with OE gasket for reliable sealing (see “Often Paired With”).
• Genuine Cummins quality and fitment.

Verified Fitment (Automotive)

Custom/Swap notes: XDP lists this plate specifically for 1994–2002 Dodge 5.9L; the commonly paired gasket (Cummins 3008400) is cataloged for 1989–2002, which is why some sellers mention earlier trucks—verify by VIN/ESN on pre-’94 builds.

Specifications

• Type: Vacuum pump block-off / cover plate (front gear housing)
• OE Part Number: 3914868
• Mounting Gasket: 3008400 (sold separately)
• Quantity Required: 1 per engine (custom delete applications)

Often Paired With

• Vacuum pump mounting gasket: Cummins 3008400 (needed under the plate)
• Electric vacuum pump kit: recommended if your truck still needs vacuum for HVAC or axle disconnect
• Vacuum pump reseal kit: Cummins 4089742 (use this instead if you’re keeping the OEM vacuum pump)

What’s In The Box

• (1) Genuine Cummins Vacuum Pump Cover Plate (3914868)
• Gasket and hardware sold separately.

Installation Tips

• Remove the vacuum pump and clean the gear-housing flange thoroughly.
• Install a new 3008400 gasket; apply sealant only if Cummins specifies.
• Tighten fasteners evenly to spec; run engine and check for seepage.
• Important: If your truck relies on engine vacuum (HVAC controls, CAD front axle, etc.), add an auxiliary electric vacuum source when deleting the pump.

FAQ

WILL THIS FIT MY 1994–2002 5.9L CUMMINS RAM?

Yes—this OE plate is listed for ’94–’02 5.9L applications when deleting the vacuum pump.

DO I NEED A GASKET?

Yes—use Cummins 3008400 between the plate and gear housing for a proper seal.

DOES THIS WORK ON 1989–1993 TRUCKS?

Many catalogs show the gasket through 1989–2002. For pre-’94 trucks using this plate in custom builds, confirm by VIN/ESN and gear-housing style before ordering.

WILL I LOSE HVAC OR 4WD FUNCTION IF I DELETE THE PUMP?

Potentially—if your truck still uses engine vacuum. Plan an electric vacuum pump solution when deleting.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3914868.