Product Description
Interstate-McBee M-68138 Vacuum Pump Male Connector – 1994–1998 5.9L Cummins (Aftermarket Replacement)
Direct-fit male connector for the belt-driven vacuum pump used on 1994–1998 Dodge Ram 2500/3500 trucks with the 5.9L Cummins. Restores a reliable, leak-free connection between the vacuum pump and line assemblies. Sold individually.
- OE-style fit: Designed to match the factory interface on the Cummins vacuum pump.
- Leak control: Helps maintain proper vacuum for brake booster and HVAC controls.
- Durable build: Quality materials to handle engine bay heat and vibration.
- Budget-smart: Interstate-McBee value and consistency at a fraction of OEM boxed pricing.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-68138 |
| Component | Vacuum pump male connector / fitting |
| Compatibility | 5.9L Cummins (12-valve), belt-driven vacuum pump systems |
| Sold As | Each |
What’s Included
- (1) Vacuum pump male connector, P/N M-68138
Vehicle Fitment
Always verify by VIN/ESN and existing pump style before ordering.
- Dodge Ram 2500/3500 with 5.9L Cummins (12-valve)
- Model Years: 1994–1998
- System: Belt-driven vacuum pump (brake booster/HVAC)
Recommended/Related Parts
- Vacuum pump gasket or O-ring (replace when servicing fittings)
- Vacuum hose/line sections and clamps as needed
- Brake booster check valve (inspect/replace if vacuum performance is low)
Install Notes
- Depressurize/secure the vehicle and allow components to cool before service.
- Clean mating surfaces; replace any hardened O-rings/seals to prevent leaks.
- Torque fittings to manufacturer specs; do not over-tighten.
- After installation, start engine and verify steady vacuum at the booster/lines.
Why Buy From CPP Diesel
- Diesel-focused tech support and ESN-verified fitment help
- Fast shipping and easy returns
- Huge selection of Cummins service parts and accessories
FAQ
Will this fit all 1994–1998 5.9L Cummins trucks?
It is intended for trucks equipped with the belt-driven vacuum pump. Verify your pump style and connector type before purchase.
Do I need new seals or O-rings?
It’s strongly recommended to replace any seals/O-rings during service to ensure a leak-free repair.
What symptoms indicate a bad connector?
Hissing at the pump, reduced brake assist, slow HVAC mode changes, or low measured vacuum.
