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Bosch Rexroth R986110784 (Series 52/53) is a direct OEM replacement for CAT 389-6779, engineered to match required hydraulic performance and maintain system compatibility under demanding operating loads.
Technical Specifications
Flow Performance
With a 45 cc displacement, R986110784 delivers consistent volumetric output per revolution to support stable actuator response and repeatable machine control. Flow capability scales predictably with speed up to 2600 RPM, supporting controlled system dynamics across the operating range. The Series 52/53 design targets reliable hydraulic output under nominal operating conditions.
Efficiency & Durability
Rated for 3600 PSI nominal pressure with 4600 PSI peak capability, the unit is designed to sustain performance under high-load hydraulic events without exceeding specified limits. Operation up to 2600 RPM supports high duty-cycle use while maintaining predictable output characteristics. These ratings help preserve system stability by keeping pressure and speed operation within defined boundaries.
Installation
Designed as an OEM-fit replacement for CAT 389-6779, R986110784 installs as a direct replacement with standard mounting alignment. No modifications are required when replacing the original component in the intended configuration.
Features and Benefits
- 45 cc displacement: Provides a fixed, repeatable displacement per revolution for predictable flow response and consistent machine function.
- 3600 PSI nominal / 4600 PSI peak pressure rating: Supports continuous operation at 3600 PSI with headroom for transient peaks up to 4600 PSI to accommodate short-duration load spikes.
- 2600 RPM maximum speed (Series 52/53): Enables operation up to 2600 RPM to maintain required hydraulic output across higher-speed operating conditions.
Operational Information
Operate within the specified 3600 PSI nominal and 4600 PSI peak pressure limits and up to 2600 RPM maximum speed to maintain stable performance. The 40 weight specification supports integration planning where component mass and mounting loads are controlled.
Quality Assurance
Manufactured to Bosch Rexroth’s stringent quality standards with rigorous testing throughout the production process.
| Weight | 40.0 lbs |
|---|---|
| Dimensions | 10 × 10 × 10 in |
| Manufacturer | Bosch Rexroth |
| Pumps Max Pressure | 3600 PSI |
| Pumps Rated Speed | 2600 |
| Pumps Max Speed | 2600 |
| Pumps Displacement | 45cc |
| Pump Continuous Pressure | 3600 PSI |
| Pump Intermittent Pressure | 4600 PSI |
Compatibility & Applications
Direct Replacement Information
The Bosch Rexroth R986110784 replaces CAT 389-6779 in high-pressure mobile and industrial hydraulic system applications.
- Closed-loop or open-loop hydraulic pumps systems requiring 45cc displacement variable flow
- Circuits operating at 3600 PSI nominal pressure with demand-based flow control
- Hydrostatic drive, implement, and auxiliary circuits using an axial piston variable pump up to 2600 max speed
Common Applications
This Bosch Rexroth R986110784 is commonly used in:
- construction and earthmoving equipment
- mining and quarry machinery
- material handling equipment
- industrial power units and process machinery
Important: Verify mounting interface, shaft configuration, rotation, and porting match the existing CAT 389-6779 installation for proper system fit and function.
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 R986110784, 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
- 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
Product Selection Guide
These Series 52/53 components share a 3600 PSI nominal pressure class, with selection primarily driven by displacement (flow) and allowable speed for your duty cycle.
?? 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 |
|---|---|---|---|---|
| R986110784 | 45cc | 3600 PSI | 2600 | 52/53 |
| R986111126 | 74cc | 3600 PSI | 2600 | 52/53 |
| R986110117 | 28cc | 3600 PSI | 3000 | 52/53 |
| R986110092 | 28cc | 3600 PSI | 3000 | 52/53 |
| R986110068 | 45cc | 3600 PSI | 2600 | 52/53 |
Key Differences
Displacement
R986110784 and R986110068 are 45cc options for mid-range flow needs, R986111126 increases to 74cc for higher flow demand, and R986110117/R986110092 reduce to 28cc when lower flow is sufficient or tighter control at lower displacement is preferred.
Pressure Rating
All compared models list 3600 PSI pressure, so pressure class is consistent across the group; for R986110784 specifically, also confirm your system stays within its 4600 PSI peak capability.
Speed
Speed differs between the 2600 max speed models (R986110784, R986110068, R986111126) and the 3000 max speed models (R986110117, R986110092); choose based on your required operating speed margin.
Quick Selection Guide
Choose: R986110784
Because: When you need a 45cc displacement with 3600 PSI nominal pressure, 4600 PSI peak pressure capability, and up to 2600 max speed in a Series 52/53 replacement. If you are comparing similar piston pumps, confirm control type and mounting details to avoid fitment issues.
Choose: Higher displacement model
Because: Choose R986111126 (74cc) when your required flow exceeds what a 45cc unit can provide at the same 3600 PSI pressure class and 2600 max speed.
Choose: Lower pressure model
Because: Not applicable within this comparison set, as all listed alternatives are rated at 3600 PSI.
Compatibility: Verify mounting pattern, shaft configuration, and port sizes match your existing installation. If you need a different cross-reference for other OEM platforms, consider related options such as R986111250.
For application-specific guidance, contact our technical team.
Bosch Rexroth R986110784 Axial Piston Variable Pump | Replaces CAT 389-6779 | 45cc | 3600 PSI
$3,033.00
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Expected delivery Oct 14 - Oct 20
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