Stanadyne Pilot Tube Bushing | 16320 | 1.840 in DB JDB

Stanadyne (Roosa Master) pilot tube (drive bushing), part number 16320, for DB, JDB, and DC agricultural rotary diesel injection pumps. This brass bushing in the pump housing supports the driveshaft and its seals; a grooved pilot tube lets diesel leak past the driveshaft seals into the crankcase. It measures 1.840 inches — confirm your length and driveshaft type before ordering, as the 16323 (1.640 inches) is a different pilot tube. Stanadyne is the original manufacturer of these fuel systems.

Key Features:

• Stanadyne pilot tube / drive bushing for DB / JDB / DC (Roosa Master) agricultural injection pumps
• Brass bushing that supports the driveshaft and driveshaft seals in the pump housing
• Length: 1.840 inches (the 16323 pilot tube is 1.640 inches)
• For pumps with a non-retained driveshaft (shaft stays in the engine)
• Genuine Stanadyne

Specifications:

• Base part number: 16320
• Component type: Pilot tube / drive bushing (brass)
• Length: 1.840 inches
• Manufacturer/system: Stanadyne / Roosa Master DB / JDB / DC rotary injection pump
• Fuel type: Diesel

Compatibility / Fitment:

• Stanadyne / Roosa Master DB, JDB, and DC agricultural pumps (also DBG)
• Length gate: measures 1.840 inches — the 16323 pilot tube (1.640 inches) is a different part; measure your old tube
• Driveshaft gate: for pumps where the driveshaft stays in the engine (non-retained); pumps with a retained/tang-drive shaft typically use 16323
• Does not fit automotive applications
• Special bushing tools recommended for installation
• Send your complete pump model number if unsure before ordering

Conclusion:

The 16320 is a Stanadyne pilot tube (drive bushing) for DB, JDB, and DC agricultural injection pumps — the brass bushing that supports the driveshaft and seals. It measures 1.840 inches; the 16323 (1.640 inches) is a different tube. Measure your old part and confirm your driveshaft type before ordering.