112-5495 Universal Joint GP Pump Drive Fits CAT Caterpillar Motor Grader 140H 120H and 160H series
112-5495 1125495
1125495 Joint GP Aftermarket Caterpillar Parts CAT 140H Pump Drive Shaft Composable models：12G, 12H, 120G, 120H, 140G, 140H, 160H
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It is a Heavy-Duty Universal Joint Shaft Assembly (specifically the Caterpillar OEM #112-5495 Universal Joint Group).
⚙️ 1. Function
The primary function of this assembly is continuous, flexible torque transmission under severe physical misalignments.
Angle Compensation: It bridges the mechanical gap between a stationary driving source (the engine) and a dynamic or slightly offset driven component (the hydraulic pump block).
Vibration Dampening: It absorbs severe rotational shocks and torsional vibrations common in heavy industrial work, shielding internal pump gears from premature mechanical fatigue.
The primary function of this assembly is continuous, flexible torque transmission under severe physical misalignments.
Angle Compensation: It bridges the mechanical gap between a stationary driving source (the engine) and a dynamic or slightly offset driven component (the hydraulic pump block).
Vibration Dampening: It absorbs severe rotational shocks and torsional vibrations common in heavy industrial work, shielding internal pump gears from premature mechanical fatigue.
📐 2. Structure
As illustrated in standard mechanical schematics, this unit is built with high-grade forged steel using a Double Cardan / Constant-Velocity style framework:
The Central Flanged Yoke (Yellow Body): A heavy cast-iron or forged steel center housing that serves as the rigid structural backbone connecting both joints.
Spider Crosses (Journals): Located inside both extremities, these four-pointed crosses handle the pivoting direction switches.
Needle Bearing Caps (Grey Ends): Wrapped with tightly packed needle rollers to spread out high torque concentrations evenly, ensuring low-friction rotation.
Heavy-Duty Mounting Flanges: Equipped with pre-drilled precision bolt holes designed to handle immense shearing forces during abrupt torque spikes.
As illustrated in standard mechanical schematics, this unit is built with high-grade forged steel using a Double Cardan / Constant-Velocity style framework:
The Central Flanged Yoke (Yellow Body): A heavy cast-iron or forged steel center housing that serves as the rigid structural backbone connecting both joints.
Spider Crosses (Journals): Located inside both extremities, these four-pointed crosses handle the pivoting direction switches.
Needle Bearing Caps (Grey Ends): Wrapped with tightly packed needle rollers to spread out high torque concentrations evenly, ensuring low-friction rotation.
Heavy-Duty Mounting Flanges: Equipped with pre-drilled precision bolt holes designed to handle immense shearing forces during abrupt torque spikes.
🚜 3. Application
This specific part size and configuration are heavily utilized across global Earthmoving, Construction, and Mining equipment:
Primary Machine Integration: Most commonly built into Caterpillar Motor Graders (such as the industry-standard CAT 140H, 120H, and 160H series).
System Placement: It serves as the primary Hydraulic Pump Drive Shaft, linking the main fly-wheel PTO (Power Take-Off) drive directly to the main implement hydraulic pump assembly.
This specific part size and configuration are heavily utilized across global Earthmoving, Construction, and Mining equipment:
Primary Machine Integration: Most commonly built into Caterpillar Motor Graders (such as the industry-standard CAT 140H, 120H, and 160H series).
System Placement: It serves as the primary Hydraulic Pump Drive Shaft, linking the main fly-wheel PTO (Power Take-Off) drive directly to the main implement hydraulic pump assembly.
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