Cummins Gear Room Cover Gasket 4007165 for QSK45 QSK60 QSK78

Part Number: 4007165
Original Factory Standard Name: GASKET, GEAR HOUSING
Chinese Product Name: Gear Housing Seal Gasket / Gearbox Cover Gasket

Actual 4007165 Gear Housing Gasket
Material: Multi-layer metal composite sealing gasket (steel plate framework with oil-resistant ACM rubber coating), high temperature resistant, diesel engine oil resistant, high pressure leak resistant
Attributes: Original factory seal specifically for QSK high-horsepower units, no universal small model replacement available

QSK45 CM500
QSK60 Full Series: CM2150 / CM2250 / CM2350 / CM850 / QSK60G Generator Set Models
QSK78 CM2250 / CM2350 / CM500

Applicable Equipment: Large mining trucks, mining generator sets, oilfield power units, high-power stationary diesel generator sets

Dimensional Tolerances

Parameter  Specification Measurement Method 

 Flatness  0.03mm/m²  CMM (Zeiss CONTURA G2) 

 Bead Height  3.0mm ±0.05 Laser profilometry 

 Hole Position  ±0.1mm Optical comparator 

Quality Assurance:

100% helium leak testing (<1x10⁻⁶ mbar·L/s)

Batch traceability via microdot matrix (Cummins SecureMark®)

Assembly Location: At the joint surface between the timing gear housing on the front end of the engine and the engine block

Core Function:To seal the lubrication chamber of the gear housing, preventing engine oil leakage and the ingress of dust and moisture; to protect the lubrication environment of the timing gears, idler gears, and fuel pump gears

Replacement Scenarios: Must be replaced with a new one during major engine overhauls, disassembly of the gear housing, oil leakage from the gear housing, or when replacing the gear housing. The old gasket cannot be reused, as its metal layer deforms after removal and cannot provide a secondary seal.