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Bosch Rexroth R986111125 (Series 52/53) is an OEM-compatible replacement for CAT 382-8077, built to restore reliable hydraulic performance with a direct-fit configuration.
Technical Specifications
Flow Performance
With an 85 cc displacement, the R986111125 delivers consistent volumetric output per revolution to match the expected flow behavior of the CAT 382-8077 interface. Performance is maintained across operating speeds up to 2500 rpm, supporting stable system response and predictable actuator control. Designed for OEM compatibility, it helps keep machine hydraulics operating to the original performance intent.
Efficiency & Durability
Rated for 3600 PSI nominal pressure and 4600 PSI peak pressure, the unit is suited for demanding duty cycles while maintaining stable operation under load. The 2500 rpm maximum speed capability supports consistent performance across a wide operating envelope without requiring changes to drive speed limits. At 75 lb, it provides a robust mechanical package aligned with heavy-duty hydraulic installations.
Installation
Engineered as a direct replacement for CAT 382-8077, the R986111125 is intended to install with OEM-compatible fitment. It is designed to replace the existing unit without modifications when installed in the matching application interface.
Features and Benefits
- 85 cc displacement: Delivers a fixed, repeatable displacement per revolution to maintain expected flow characteristics in OEM replacement installations.
- 3600 PSI nominal / 4600 PSI peak pressure rating: Supports continuous operation at 3600 PSI with capacity for transient peaks up to 4600 PSI to handle load spikes.
- 2500 rpm maximum speed capability: Maintains operational capability up to 2500 rpm for consistent response across typical machine speed ranges.
Operational Information
Operate within the rated limits of 3600 PSI nominal pressure, 4600 PSI peak pressure, and up to 2500 rpm maximum speed to maintain consistent performance. Proper system setup and clean hydraulic fluid help sustain reliable operation in OEM replacement service.
Quality Assurance
Manufactured to Bosch Rexroth’s stringent quality standards with rigorous testing throughout the production process.
| Weight | 75.0 lbs |
|---|---|
| Dimensions | 20 × 20 × 15 in |
| Manufacturer | Bosch Rexroth |
| Pumps Max Pressure | 3600 PSI |
| Pumps Rated Speed | 2500 |
| Pumps Max Speed | 2500 |
| Pumps Displacement | 85cc |
| Pump Continuous Pressure | 3600 PSI |
| Pump Intermittent Pressure | 4600 PSI |
Compatibility & Applications
Direct Replacement Information
This Rexroth R986111125 replaces CAT 382-8077 in high-pressure closed-loop and open-circuit hydrostatic system applications.
- Hydraulic systems requiring 85cc displacement variable flow control
- Applications operating at 3600 PSI nominal pressure
- Hydrostatic drive circuits (closed-loop) for propulsion and travel functions
- Open-circuit implement circuits where variable displacement pump control is used for work functions
- Systems with pump speeds up to 2500 RPM
Common Applications
This Bosch Rexroth R986111125 is commonly used in:
- construction equipment hydraulic drives
- mining and quarry equipment hydraulics
- forestry equipment hydrostatic systems
- material handling equipment hydraulics
- industrial mobile power units
Important: Verify mounting interface, shaft configuration, rotation, control type, and porting match the existing CAT 382-8077 installation before installation.
Product Selection Guide
These Series 52/53 components share a 3600 PSI nominal pressure class, so selection is primarily driven by displacement (flow per revolution) and allowable speed differences within your hydraulic pumps setup.
?? Important: The specifications shown are for reference and comparison purposes. Always verify specifications with the official manufacturer documentation or contact our technical team before ordering to ensure compatibility with your application.
| Part Number | Displacement | Pressure | Max Speed | Series |
|---|---|---|---|---|
| R986111125 | 85cc | 3600 PSI | 2500 | 52/53 |
| R986110036 | 45cc | 3600 PSI | 2600 | 52/53 |
| R986111528 | 100cc | 3600 PSI | 2300 | 52/53 |
| R986111374 | 45cc | 3600 PSI | 2600 | 52/53 |
| R986111185 | 71cc | 3600 PSI | 2600 | 52/53 |
Key Differences
Displacement
R986111125 is 85cc, positioned between 71cc (R986111185), 45cc (R986110036/R986111374), and 100cc (R986111528); higher displacement supports higher flow at the same speed, while lower displacement suits lower flow requirements.
Pressure Rating
All listed comparison models are shown at 3600 PSI, matching the nominal pressure of R986111125; R986111125 also specifies a 4600 PSI peak pressure, so verify peak/overload requirements when comparing.
Speed
Maximum speed varies: R986111125 is 2500, the 45cc and 71cc options list 2600, and the 100cc option lists 2300; choose based on your required operating speed ceiling.
Quick Selection Guide
Choose: R986111125
Because: When you need an 85cc displacement with 3600 PSI nominal pressure, 4600 PSI peak pressure, and up to 2500 max speed within the Series 52/53 range.
Choose: Higher displacement model
Because: Choose R986111528 (100cc) when your flow requirements are higher than an 85cc unit can provide at your available operating speed, and a 2300 max speed limit is acceptable.
Choose: Lower displacement model
Because: Choose R986111185 (71cc) or R986110036/R986111374 (45cc) when your flow requirements are lower and you want a smaller displacement option that lists up to 2600 speed.
Compatibility: Verify mounting pattern, shaft configuration, and port sizes match your existing installation, and confirm the required displacement, pressure (nominal and peak), and maximum speed align with your system.
For application-specific guidance on variable-displacement piston pumps, contact our technical team.
Purchasing Information
Availability & Delivery
Most Bosch Rexroth replacement parts ship within 1-3 business days. Custom or special-order items may require additional lead time.
For current availability on R986111125, call (800) 823-4937.
Warranty & Protection
- Standard Warranty: 18 months from date of shipment or 12 months from date placed in service, whichever occurs first
- Coverage: Defects in material and workmanship under normal operating conditions
- Remedy: Repair, replacement, or credit at seller’s option
- Conditions: Product must be used per manufacturer specifications and documentation
Ordering Options
Contact our sales team for pricing and availability. Volume discounts may be available for larger orders.
We accept purchase orders from established accounts. New customers may require prepayment or credit approval.
Support & Documentation
- Technical specifications and datasheets available upon request
- Cross-reference assistance for OEM part identification (including related replacements such as R986111250 when applicable)
- Application engineering support for system integration
- Returns accepted within 30 days in unused, original condition
Questions? Call our specialists: (800) 823-4937 | Monday-Friday, 7 AM – 5 PM MST
Bosch Rexroth R986111125 Axial Piston Variable Pump | Replaces CAT 382-8077 | 85cc | 3600 PSI
$4,674.00
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Expected delivery Oct 13 - Oct 19
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