1179887, 117-9887 SPIDER CATERPILLAR

Heavy-Duty Spider Assembly for Caterpillar Driveline Systems

The 1179887 SPIDER CATERPILLAR (also written as 117-9887) is a premium-grade driveline component designed for Caterpillar heavy machinery that demands superior strength, alignment precision, and vibration control. As the central link in the universal joint assembly, this spider ensures efficient torque transfer, stability, and flexibility between rotating shafts under high loads.

Manufactured using forged alloy steel and precision machining, the 1179887 SPIDER CATERPILLAR delivers unmatched durability, extended service life, and consistent performance in demanding work environments such as construction, mining, and earthmoving. Supplied globally by 3GEN Export, this OEM-quality component is engineered for perfect fitment and reliability across a wide range of Caterpillar equipment.

Function and Importance of the 1179887 SPIDER CATERPILLAR

In Caterpillar machinery, the spider (or universal joint cross) is a key part of the driveline system, transmitting power between shafts that are not in a straight line. The 1179887 SPIDER CATERPILLAR allows for smooth and consistent rotation while accommodating angular misalignment, preventing binding or uneven wear in the drivetrain.

Each arm of the spider rotates within needle-roller bearings, allowing the shafts to move freely under changing loads and articulation angles. This flexibility is critical in maintaining torque flow and protecting the connected components — such as yokes, driveshafts, and differentials — from excessive stress.

By minimizing friction and ensuring proper shaft alignment, the 1179887 SPIDER CATERPILLAR improves machine handling, reduces vibration, and extends the lifespan of critical drivetrain assemblies.

Key Features and Benefits

1. Forged Alloy Steel Construction

The 1179887 SPIDER CATERPILLAR is forged from high-tensile steel to achieve superior strength and resistance against torque distortion. The forging process refines the internal grain structure, resulting in a component that can withstand repeated stress and shock loads.

2. Precision Needle Bearing System

Each trunnion end is fitted with precision needle bearings for smooth motion, minimal friction, and enhanced load distribution. The design ensures consistent lubrication and reduces metal-to-metal contact.

3. Advanced Heat Treatment

Heat-treated for optimal hardness, the surface resists wear and fatigue while the inner core retains flexibility. This dual-hardness profile allows it to endure extreme torsional loads without fracturing.

4. Corrosion-Resistant Finish

A phosphate-based anti-corrosive coating protects the 1179887 SPIDER CATERPILLAR from moisture, dirt, and chemical exposure, ensuring long-term performance even in harsh operating environments.

5. Centralized Lubrication Port

The built-in grease fitting allows for uniform lubrication throughout all bearings, reducing maintenance time and ensuring consistent performance under continuous operation.

6. OEM-Quality Engineering

This component matches Caterpillar’s original dimensions and tolerances exactly. It is a direct-fit replacement part requiring no modification — ensuring reliable, trouble-free installation.

Technical Specifications

Compatible Caterpillar Models

The 1179887 SPIDER CATERPILLAR is compatible with a wide range of Caterpillar heavy machinery models, including:

• Caterpillar 12G, 120G, 140G Motor Graders

• Caterpillar 966E, 966F, 980C Wheel Loaders

• Caterpillar D6H, D7G, and D8N Track-Type Tractors

• Caterpillar 815F and 826K Compactors

• Caterpillar 325C, 330D, and 345B Hydraulic Excavators

• Caterpillar 730, 740, and 745C Articulated Trucks

• Caterpillar 950H and 962G Wheel Loaders

• Caterpillar 973D and 963D Track Loaders

• Caterpillar C9 and C13 Engine Driveline Assemblies

This wide compatibility demonstrates the adaptability of the 1179887 SPIDER CATERPILLAR across various Caterpillar powertrain systems that require dependable rotational alignment and torque handling.

Engineering and Manufacturing Quality

Precision Forging

The forging process produces a denser structure than casting, eliminating porosity and enhancing the spider’s ability to handle repetitive impact loading. This ensures structural integrity under high torque and dynamic motion.

CNC Machining

Every surface and bearing journal of the 1179887 SPIDER CATERPILLAR is CNC-machined to micrometer accuracy. This precision guarantees consistent bearing seating, perfect trunnion alignment, and vibration-free operation.

Controlled Heat Treatment

Through carburizing and induction-hardening, the outer surface achieves optimal hardness, while the inner core retains ductility. This combination provides both rigidity and resilience.

Dynamic Balancing

Each assembly is dynamically balanced to eliminate driveline vibration and ensure smooth torque transmission even under full-load operation.

Performance Advantages

• Efficient Torque Transfer: Delivers steady rotational power through multi-angle shaft motion.

• Reduced Vibration: Balanced structure prevents oscillation in driveline components.

• Low Maintenance: Long-life lubrication system reduces service frequency.

• Extended Component Life: Prevents premature bearing wear and misalignment.

• Perfect Fit & OEM Reliability: Matches Caterpillar standards for seamless integration.

Typical Applications in Caterpillar Machinery

The 1179887 SPIDER CATERPILLAR is an essential part of Caterpillar’s heavy-duty mechanical powertrain systems. Its common applications include:

• Transmission to Axle Connections: Maintains torque transmission between drivetrain shafts.

• Driveshaft Couplings: Allows flexible rotation between misaligned shafts.

• Differential Assemblies: Transfers power while compensating for movement and articulation.

• Powertrain Assemblies: Ensures stable motion in multi-joint drivetrain configurations.

This versatility allows the spider to operate seamlessly in high-load, high-vibration conditions across multiple heavy equipment categories.

Installation and Maintenance

Installation Guidelines

1. Clean all mating surfaces thoroughly before installation.

2. Insert the 1179887 SPIDER CATERPILLAR into the yoke, ensuring alignment of all bearing caps.

3. Press-fit the bearing caps evenly using hydraulic equipment.

4. Secure retaining rings or clips as specified in the Caterpillar service manual.

5. Apply fresh grease through the central fitting before operation.

Maintenance Tips

• Lubricate regularly: Every 250 hours (or per OEM schedule).

• Inspect seals: Replace immediately if grease leaks or dust intrusion occurs.

• Check alignment: Misalignment can cause early bearing wear.

• Monitor vibration: Replace the assembly if oscillation exceeds OEM tolerances.

Following these guidelines ensures optimal performance and longevity of the 1179887 SPIDER CATERPILLAR.

Quality Testing and Certification

All components supplied by 3GEN Export undergo a strict multi-stage quality assurance process, including:

• Dimensional Inspection: Verifies tolerance within ±0.02 mm.

• Hardness Testing: Confirms proper heat-treat penetration and surface integrity.

• Torque and Fatigue Simulation: Replicates long-term operational loads.

• Corrosion Testing: Exposed to 120-hour salt-spray test conditions.

• Vibration Analysis: Ensures minimal oscillation at high rpm.

Each part is certified to meet or exceed OEM standards, guaranteeing consistent quality and performance.

Environmental and Safety Standards

Produced under ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) systems, the 1179887 SPIDER CATERPILLAR complies with global safety and sustainability regulations.
It is RoHS and REACH compliant, ensuring that no harmful substances are used during manufacturing.

Packaging and Delivery

Each spider assembly is individually wrapped in anti-corrosion packaging and labeled for quick identification. Bulk orders are packed in shock-resistant wooden crates to prevent transit damage.

Delivery Time: 3GEN Export ensures worldwide shipping within 5 working days, providing full export documentation and logistical support.

Why Choose 3GEN Export

3GEN Export is a global OEM-quality supplier specializing in heavy machinery spare parts for brands such as Caterpillar, Komatsu, Volvo, and Sandvik.

• OEM Precision: Matches Caterpillar engineering specifications.

• Global Distribution: Ships to 120+ countries within 5 days.

• Technical Expertise: Professional advice on fitment and compatibility.

• Sustainability: Eco-friendly production and packaging practices.

• Customer Support: Dedicated team for order tracking and after-sales service.

When you choose 3GEN Export, you choose reliability, precision, and global performance.

Summary

The 1179887 SPIDER CATERPILLAR is a precision-engineered universal joint cross designed for maximum durability and torque efficiency in Caterpillar heavy machinery. Built from forged alloy steel with sealed needle bearings and an anti-corrosive finish, it ensures smooth power transmission and long-term reliability in demanding work conditions.

As a trusted OEM supplier, 3GEN Export offers this part with guaranteed quality, perfect fitment, and fast worldwide delivery in 5 working days.

Order your 1179887 SPIDER CATERPILLAR today from 3GEN Export and keep your Caterpillar machinery operating at its best.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.