Cat E320B Excavator Aluminum Radiator (OE: 118-9953 / 1189953) Specification
Short Description:
The aluminum radiator with OE numbers 118-9953 (also written as 1189953) is a dedicated OEM-standard water-cooling component designed for Caterpillar E320B series excavators, including E320B, E320BL models. It is exclusively matched to the Cat 3066 diesel engine (80–120 kW power range), responsible for circulating coolant to dissipate heat, preventing engine overheating and ensuring stable operation under heavy construction conditions. As a direct original replacement part, it strictly follows OEM specifications for perfect compatibility.
In terms of core dimensions, the radiator assembly measures approximately 860mm (length) × 825mm (width) × 100mm (thickness), with the core size around 702×730×68mm. Both inlet and outlet have a 38mm diameter with standard flange connections, matching the original coolant hoses for reliable sealing and easy disassembly. It adopts a bolt-on flange mounting with 4 positioning holes, allowing direct replacement without any modification to the excavator frame, weighing about 35kg as a single unit.
The aluminum radiator with OE numbers 118-9953 (also written as 1189953) is a dedicated OEM-standard water-cooling component designed for Caterpillar E320B series excavators, including E320B, E320BL models. It is exclusively matched to the Cat 3066 diesel engine (80–120 kW power range), responsible for circulating coolant to dissipate heat, preventing engine overheating and ensuring stable operation under heavy construction conditions. As a direct original replacement part, it strictly follows OEM specifications for perfect compatibility.
Core Dimensions & Fitment
In terms of core dimensions, the radiator assembly measures approximately 860mm (L) × 825mm (W) × 100mm (T), with the core size around 702×730×68mm. Both inlet and outlet have a 38mm diameter with standard flange connections, matching the original coolant hoses for reliable sealing and easy disassembly.
It adopts a bolt-on flange mounting with 4 positioning holes, allowing direct replacement without any modification to the excavator frame, weighing about 35kg as a single unit.
| Parameter | Specification |
|---|---|
| Overall Assembly Size | 860mm × 825mm × 100mm |
| Core Size | 702mm × 730mm × 68mm |
| Inlet / Outlet Diameter | 38mm (Standard Flange) |
| Mounting Type | Bolt-on Flange, 4 Positioning Holes |
| Unit Weight | ~35 kg |
Construction & Materials
Constructed with full aluminum tube-and-fin structure, the core uses brazing or tube expansion technology to ensure tight bonding between tubes and fins, achieving high thermal conductivity, corrosion resistance, and lightweight performance.
The end tanks are made of reinforced engineering plastic or aluminum, resistant to -20°C to 120°C, adapting to extreme construction environments. It features a direct-flow design, optimizing airflow in the E320B engine compartment for efficient heat dissipation.
Performance Specifications
It has a rated working pressure of 200kPa (29psi), meeting high-load pressure requirements to avoid leakage. Its continuous heat dissipation capacity is ≥18kW, sufficient for full-load, climbing, and high-temperature operations. It is compatible with Cat original ethylene glycol coolant (freezing point ≤-35°C, boiling point ≥108°C), requiring no medium replacement.
| Performance Item | Value |
|---|---|
| Rated Working Pressure | 200 kPa (29 psi) |
| Heat Dissipation Capacity | ≥18 kW (continuous) |
| Coolant Compatibility | Cat Ethylene Glycol (FP ≤-35°C / BP ≥108°C) |
| Applicable Engine | Cat 3066 (80–120 kW) |
Additional Features & Warranty
Additional features include a standalone design (no built-in oil cooler), a bottom plastic drain valve for easy maintenance, ISO 9001 and TS16949 certifications, and 100% pressure testing before shipment. It comes with a 6–12 month or 1,000 operating hours warranty, making it a durable, reliable OEM-level replacement for Cat E320B excavators.
