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Caterpillar 1R-9958 Engine Cover Lock Assembly
Caterpillar 1R-9958 Engine Cover Lock Assembly - Image 2
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Caterpillar 1R-9958 Engine Cover Lock Assembly


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Part NameEngine Cover Lock Assembly
Key Included2
MaterialCast Steel
FinishPainted Black
Mounting TypeBolt-On
Weight0.6 kg
Length30.48 cm
Width20.32 cm
Height3.81 cm
Package Dimensions32 × 22 × 6 cm

Manufacturer No.

  • 1R-9958
  • 1R9958

OEM Part No.

  • 1R-9958
  • 1R9958
  • 375-8749
  • 375-8750
  • 4I-0117
  • 5P8500
  • CA1R9958

Engine Part No.

  • Caterpillar 3046
  • Caterpillar 3054
  • Caterpillar 3066
  • Caterpillar 3116
  • Caterpillar 3126
  • Caterpillar 3126B
  • Caterpillar 3176C
  • Caterpillar 3306
  • Caterpillar C7
  • Caterpillar C9

Interchange No.

  • 375-8749
  • 375-8750
  • 4I-0117
  • 5P8500
  • CA1R9958

Fitment Vehicles

  • Caterpillar 311C
  • Caterpillar 312D
  • Caterpillar 315
  • Caterpillar 315B
  • Caterpillar 315C
  • Caterpillar 317B
  • Caterpillar 318B
  • Caterpillar 319C
  • Caterpillar 320
  • Caterpillar 320C
  • Caterpillar 320D
  • Caterpillar 322
  • Caterpillar 325
  • Caterpillar 330
  • Caterpillar M315D
  • Caterpillar M325B
  • Caterpillar M325C
  • Caterpillar M330D
The Caterpillar 1R-9958 engine cover lock assembly secures the engine hood or cover on hydraulic excavators. It is a direct replacement for OEM part numbers 375-8749, 375-8750, 4I-0117, and 5P8500. The assembly includes the latch mechanism, catch, and two matching keys. Constructed from cast steel with a painted finish for corrosion resistance in harsh construction environments. Designed for bolt-on installation using existing mounting points. Compatible with a wide range of Caterpillar excavator models including the 311C, 312D, 315, 315B, 315C, 317B, 318B, 319C, 320, 320C, 320D, 322, 325, 330 series and wheeled excavators M315D, M325B, M325C, M330D. Also applicable to machines powered by Caterpillar 3046, 3054, 3066, 3116, 3126, 3126B, 3176C, 3306, C7, and C9 engines. Weight is approximately 0.6 kg. Dimensions are 30.48 cm length, 20.32 cm width, and 3.81 cm height.