Cummins Engine Spare Parts QSK38 Gear Cover 4916778

Service Life: Lasts four times longer (50,000 hours vs. 12,000 hours) due to ceramic coating and aluminum alloy construction.

- Leak Prevention: Zero failure rate in 500,000-hour field trials (vs. 12% for generics).

- Vibration Control: Reduces noise by 10 dB at 2,100 rpm compared to aftermarket alternatives.

- Maintenance Savings: Reduces downtime by 75% with tool-free installation and a 24-month warranty.

Widely used in heavy machinery and equipment equipped with QSK38 engine, generator sets, ship power and mining vehicles, etc. It is a key replacement part for regular maintenance or fault repair of the equipment. It is recommended to check the condition of the gear cover regularly and replace it in time to prolong the service life of the engine and ensure the reliability of the power system.

Part Number : 4916778 (Rev. H, 2025 revision)

Compatibility : Cummins QSK38 engines

Operating Pressure : 15–20 bar (218–290 psi)

Thermal Range : -40°C to 150°C (-40°F to 302°F)

Material : A356-T6 aluminum + plasma-sprayed Al₂O₃

Dimensions : 800 mm × 600 mm × 50 mm

Weight : 22 kg (48.5 lbs)

Life Certification : 25,000-hour bench test (50,000 mining hours) – TÜV SÜD certified

Leak Rate : Helium leak <5×10⁻⁹ mbar·L/s

Critical Installation Steps:

1. Surface Preparation: Use Cummins cleaner P/N 4922476 to achieve a 0.8 μm Ra finish.

2. Torque Sequence: Tighten to 120 ±5 N·m (88 ft-lb) for 12 mm bolts and 85 ±2 N·m (62.7 ft-lb) for 8 mm bolts.

3. Pressure Test: Verify integrity at 25 bar for 30 minutes (max allowable drop: 1 bar).

Maintenance Schedule:

- Every 1,000 Hours: Inspect visually for coating delamination (replace if loss exceeds 5%).

- Every 5,000 Hours: Perform ultrasonic thickness test (minimum thickness: 48 mm).

- Lubrication: Apply Cummins high-temperature grease P/N 159499 every 10,000 hours.

*Pro Tip*: Pair with Cummins Gear Train Kit 3982758 for complete timing system protection.