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Small black rubber oil seal ring with metal spring visible inside circular cross section

Mi-T-M

Mi-T-M 46-0931 Oil Seal accessory

SKU CH-9J7K-3F4E8

An oil seal compatible with numerous Mi-T-M pressure-washer pump models

  • Prevents oil leaks on compatible Mi-T-M pressure washers
  • Fits Grainger JCW-3504-0MHB and CA-3504-0MHB models
  • Compatible with GA-4004-0MHB and GBJ-3504-0MKB units
  • Works with CBA-4004-0MHB and GBA-3504-0MHB pumps
  • Replaces worn seals to maintain pump performance

Compatible Replacement Oil Seal

The Mi-T-M 46-0931 oil seal is a new replacement part for compatible pressure-washer pumps. It fits a long list of models including the 3500, 3504, 4000 and 4004 series as well as the 3003 and 3004 series. The seal is designed for equipment referenced by Grainger item numbers such as CA-3504-0MHB and GP-3500-0MVC.

When To Replace The Seal

This seal replaces a worn or leaking original seal in the pump assembly. The jump is worth it when the pump shows oil seepage or pressure loss caused by seal degradation. Installing the new seal restores the oil barrier and helps the pump maintain its rated performance. It is not for users who need a complete pump rebuild kit or additional internal components.

Limits Of The Seal Interface

The seal functions only within the specific pump models listed in the compatibility data. It cannot adapt to pumps outside the 3003, 3004, 3500, 3504, 4000 or 4004 series. Correct fit depends on matching the exact Grainger item number of the host machine. Buyers who need a different shaft diameter or housing profile must source the correct alternative part.

How it compares

Measured against everything we stock in Pressure Washer Guns & Spare Parts, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 64% of the 141 comparable items (median $26.99).

Specifications

Product
Brand nameMI-T-M

Questions about this item

Which Mi-T-M pressure washer models accept the 46-0931 oil seal?

The 46-0931 oil seal fits Mi-T-M units including CA-3504-0MHB, CA-4000-0MHB, GA-3504-0MHB, GA-4004-0MHB, GP-3500-0MVC, CBA-3504-0MHB, CBA-4004-0MHB, GBA-3004-0MHB, GBA-3504-0MHB, GBA-4004-0MHB, GBJ-3003-0MKB, GBJ-3504-0MKB, GBJ-4004-0MKB, JCW-3504-0MHB, JCW-4004-1MHB and related model numbers.

How do I install the oil seal and what step is often missed?

Remove the pump housing, press the new seal squarely into the bore until it seats fully, then reassemble; the step often missed is lubricating the seal lip with clean pump oil before installation to prevent dry-start damage.

When should the oil seal be replaced on a Mi-T-M pressure washer?

Replace the 46-0931 oil seal whenever oil leaks appear at the pump shaft, during scheduled pump rebuilds, or if the seal lip shows hardening, cracking or wear after extended high-pressure use.

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