CAT 077-5974 DRIVE PLATE

CAT 077-5974 is a Caterpillar original drive board (pure original factory information, no additional description), used in engineering machinery transmission systems to connect power input and actuators, transmit torque and position transmission components, and is suitable for heavy-duty and high-frequency vibration conditions.

Core Parameters and Information

Item Details
Part Model: CAT 077-5974 (0775974) Drive Plate

Structure Type: Disk-type rigid drive plate with a central positioning hole, evenly distributed mounting bolt holes along the edges, and a positioning step and keyway on the surface; no elastic elements.

Material: Main body is 42CrMo alloy steel, heat-treated, hardness HRC 28-32; surface hard chrome plated, thickness 0.05-0.1 mm, corrosion-resistant and wear-resistant; keyway is 40Cr, carburized and quenched, hardness HRC 58-62.

Key Dimensions: Outer diameter 280 mm, inner diameter 80 mm, thickness 20 mm, positioning step diameter 100 mm, keyway width 12 mm, depth 5 mm, number of bolt holes 8, hole diameter 14 mm, hole spacing diameter 240 mm, chamfer radius 2 mm.

Performance Parameters: Rated torque 8000 N・m, maximum speed 3000 rpm. RPM, flatness ≤0.05 mm, runout ≤0.08 mm, bolt preload 180-200 N・m, applicable temperature -40℃ to 150℃
Compatibility Standards: Complies with CAT transmission component specifications, passes ISO 6316 and SAE J620 standards, dimensional tolerance GB/T 1804 – f grade, surface roughness Ra≤1.6 μm
Compatible Models and Installation:
Compatible equipment: CAT 349D2/352 excavators, 988K loaders, D8T bulldozers, 777 mining trucks, etc., for transmission power and positioning of transmission components, suitable for heavy-duty and impact conditions.

Installation Method: The center hole is interference-fitted with the shaft (φ80 mm). The keyway is positioned with the shaft key. Edge bolts connect the flywheel/flange. During installation, use a torque wrench to tighten the bolts diagonally to ensure a flush fit, no off-center load, and axial clearance ≤0.1 mm.

Matching Components: Each drive plate comes with 8 grade 10.9 bolts and 8 spring washers, used with 077-5842 bearings and 077-5945 bearing retaining rings for power transmission and positioning in the drive system.

Installation and Maintenance Points: Clean the drive plate surface, shaft diameter, keyway, and bolt holes. Check for burrs, cracks, and deformation. Measure dimensions and runout to ensure compliance with installation requirements.

Hot-fit the drive plate to the shaft (80-100℃). After aligning the keyway, press it into place. Tighten the bolts in three diagonal stages to the specified preload. Check the flush fit and runout.

After installation, the rotation was tested to be flexible and without jamming, with no abnormal noise, stable torque transmission, and axial and radial runout within the allowable range. All connections were secure.

Maintenance: Check the flatness, runout, and bolt preload of the drive plate every 1500 hours. Replace the drive plate if deformation, cracks, keyway wear, or surface peeling are found. Do not strike or heat-reassemble deformed parts after disassembly to avoid secondary damage.