Please note that this item is not part of our regular inventory and will ship directly from the manufacturer. Direct factory processing and dispatch typically take 3 to 5 business days.

The Udor 0019.01 Transmission Gear / Gear Shaft is an original equipment replacement component for compatible Udor gear-reduction drives.

Gasoline engines typically run at a much higher RPM than Udor diaphragm and plunger pumps are designed to operate. The gear reduction assembly lowers engine speed and transfers power from the engine to the pump through a series of gears and shafts.

The 0019.01 is one of the primary internal transmission components in this drive system. It works with the engine gear and pump gear to transmit torque through the gearbox while maintaining correct gear engagement.

Older Udor documentation identifies 0019.01 as a Transmission Gear, which is also how it is currently listed in the Gregson-Clark catalog. Newer Udor documentation describes the same part number as a Gear Shaft “S164” in current gear reductions and Gear Shaft “M164” in older M164 assemblies.

Fitment

The Udor 0019.01 has verified fitment in multiple Udor gear reduction assemblies.

5033.A4 Gearbox

Udor’s archived OEM breakdown lists:

• Ref. 150
• 0019.01
• Transmission Gear
• Quantity: 1

Fits Pumps Using 5033.A4

• KAPPA 55/GR-8
• KAPPA 75/GR
• RO-70/GR-8
• RO-106/GR
• RO-110/GR

5100.04 Gear Reduction

Udor’s current 5100.04 breakdown identifies:

• 0019.01
• Gear Shaft “S164”
• Quantity: 1

Fits Pumps Using 5100.04

• KAPPA 55
• KAPPA 75
• DELTA 75
• ZETA 120

The 5100.04 is designed for compatible gas engines with 1-inch shafts.

5053.E5 Gear Reduction

Udor’s OEM breakdown for the 5053.E5 identifies:

• 0019.01
• Gear Shaft “M164”
• Quantity: 1

Fits

• GAMMA 62/GR

The 5053.E5 is a gas-engine gear reduction for the GAMMA 62 plunger pump on compatible engines up to 16 HP with a 1-inch shaft.

5100.06 Gear Reduction

Udor’s current 5100.06 breakdown also identifies:

• 0019.01
• Gear Shaft “S164”
• Quantity: 1

Fits

• GAMMA 62

The 5100.06 is the newer S164-style gas-engine reduction used with the GAMMA 62 plunger pump.

Verified Pump Fitment Summary

The 0019.01 is therefore verified for gear-reduction configurations serving:

• KAPPA 55
• KAPPA 55/GR-8
• KAPPA 75
• KAPPA 75/GR
• DELTA 75
• ZETA 120
• RO-70/GR-8
• RO-106/GR
• RO-110/GR
• GAMMA 62
• GAMMA 62/GR

Important: 0019.01 is a gear-reduction component, not an internal pump crankshaft or pump gear. Fitment depends on the pump being equipped with one of the compatible gear-reduction assemblies above. 

Please check parts breakdown for proper fitment.