L-Series

L2800, L3130, L3200, L3240, L3400, L3430, L3540, L3800, L3830, L3940, L4240, L4330, L4400, L4600, L4630, L4740, L5040, L5240.

M-Series

M59, M7060, M6141.

MX-Series

MX4700, MX4800, MX5000, MX5100, MX5200, MX5800.

Compact Tractors

BX2670, BX2660, BX25D (in specific engine variations).

Skid Steers

Bobcat S130, S150, S160, S175, S185, S205, T140, T180, T190.

Excavators

KX91-3, KX121-3, KX161-3, U35, U45.

Generators & Forklifts

Various models from Hyster, Yale, and Carrier (reefer units) that utilize Kubota engines.

Kubota

V2403-M (Naturally Aspirated), V2403-M-T (Turbocharged), V2203-M

Bobcat Loaders

S130, S150, S160, S175, S185, S205, T180, T190.

Kubota Excavators

KX121-3, KX161-3, U45-3.

Kubota Tractors

L4330, L4630, L5030, L39.

• Material – Heavy-duty Cast Iron (Housing)
• Impeller Material – Cast Iron or Pressed Steel
• Configuration – Flange-driven (3-bolt or 4-bolt pulley mounting)
• Weight – Approximately 2.8 kg (6.2 lbs)
• Seal Type – High-temp Ceramic Mechanical Seal
• Included Hardware – Usually includes the mounting gasket (1G851-73430)

1K321-73030Original Version: Often found on older factory builds.

1K321-73032Current Successor: The most common modern replacement with updated seals.

1K321-73033Alternative Revision: Often used in Tier 4 engine configurations.

1K321-73035Industrial Revision: Sometimes specified for stationary power units.

A-1K321-73031Aftermarket Code: Standard prefix used by distributors like Reliance or TVH.