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Bosch Rexroth R986110679 (Series 52/53) is a direct OEM replacement for CAT 444-8539, built to restore reliable hydraulic performance with consistent fit and operating characteristics.
Technical Specifications
Flow Performance
With a 100 cc displacement, the R986110679 delivers predictable output per revolution for stable actuator response and smooth system control. Performance is maintained across operating speeds up to 2300 RPM, supporting consistent flow behavior under varying demand. The Series 52/53 design targets repeatable hydraulic output for OEM-equivalent functionality.
Efficiency & Durability
Rated for 3600 PSI nominal pressure and 4600 PSI peak pressure, this unit is designed to sustain high-load operation without sacrificing performance consistency. Operation up to 2300 RPM supports high-duty cycles while maintaining controlled hydraulic response. The 75 lb build reflects a robust assembly intended for long service life in demanding hydraulic circuits.
Installation
Engineered as an OEM replacement for CAT 444-8539, the R986110679 is intended to match the original interface for straightforward installation. It is designed as a direct replacement requiring no modifications when installed in the correct OEM configuration.
Features and Benefits
- 100 cc displacement: Provides consistent output per revolution for predictable system response and repeatable machine performance.
- 3600 PSI nominal / 4600 PSI peak pressure capability: Supports high-load operation with defined pressure headroom for transient spikes up to 4600 PSI.
- 2300 RPM maximum speed: Enables stable performance across a broad operating range up to 2300 RPM for responsive hydraulic operation.
Operational Information
Designed for hydraulic systems operating up to 3600 PSI nominal and 4600 PSI peak, with rotational speeds up to 2300 RPM. For reliable operation, maintain system conditions within the OEM-defined fluid cleanliness and temperature requirements for the host machine.
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 | 2300 |
| Pumps Max Speed | 2300 |
| Pumps Displacement | 100cc |
| Pump Continuous Pressure | 3600 PSI |
| Pump Intermittent Pressure | 4600 PSI |
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 R986110679, 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
Compatibility & Applications
Direct Replacement Information
This Rexroth R986110679 replaces CAT 444-8539 in closed-loop and open-circuit hydraulic system applications.
- Hydraulic systems requiring 100cc displacement variable flow control
- Circuits operating at 3600 PSI nominal pressure (up to application limits) with variable displacement axial piston pump control
- High-speed pump drive applications up to 2300 RPM in mobile or industrial hydraulic power units
- Hydrostatic transmission and implement circuits where variable displacement supports load-sensing or pressure-compensated control strategies
Common Applications
This Bosch Rexroth R986110679 is commonly used in:
- construction and earthmoving equipment hydraulic pumps systems
- mining and quarry equipment
- material handling equipment (telehandlers, forklifts, loaders)
- industrial hydraulic power units and test stands
- forestry equipment and heavy-duty attachments
Important: Verify mounting interface, shaft configuration, rotation, control type, and porting match the existing CAT 444-8539 installation before use.
Product Selection Guide
These Series 52/53 components share a 3600 PSI nominal pressure rating, so selection is 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 |
|---|---|---|---|---|
| R986110679 | 100cc | 3600 PSI | 2300 | 52/53 |
| R986110046 | 71cc | 3600 PSI | 2600 | 52/53 |
| R986110606 | 100cc | 3600 PSI | 2300 | 52/53 |
| R986110048 | 60cc | 3600 PSI | 2600 | 52 |
| R986110066 | 45cc | 3600 PSI | 2600 | 52/53 |
Key Differences
Displacement
R986110679 and R986110606 are 100cc options for higher flow per revolution, while R986110046 (71cc), R986110048 (60cc), and R986110066 (45cc) reduce flow and can better suit lower-flow circuits or finer control needs.
Pressure Rating
All listed comparison parts are rated at 3600 PSI nominal; the current product R986110679 also specifies a 4600 PSI peak rating, so confirm your system peak events align with the component you select.
Speed
R986110679 and R986110606 list a 2300 max speed, while the lower-displacement alternatives list 2600, which may benefit higher-speed operating points when displacement needs are lower.
Quick Selection Guide
Choose: R986110679
Because: When you need 100cc displacement with 3600 PSI nominal pressure, 4600 PSI peak capability, and a 2300 max speed limit consistent with your existing setup.
Choose: R986110606
Because: When you want to stay at 100cc displacement and 3600 PSI nominal with the same 2300 max speed as R986110679, and the rest of your configuration matches this part number.
Choose: R986110046 / R986110048 / R986110066
Because: When your circuit requires less flow per revolution (71cc/60cc/45cc) and you may benefit from a higher listed max speed of 2600 while maintaining a 3600 PSI nominal pressure rating.
Compatibility: Verify mounting pattern, shaft configuration, and port sizes match your existing installation, and confirm speed/pressure limits (including peak events) align with your machine requirements. If you are comparing options across similar piston pumps, match control type and rotation to avoid commissioning issues.
For application-specific guidance, contact our technical team. If you need an alternative Rexroth replacement for a different OEM platform, you may also reference R986111250.
Bosch Rexroth R986110679 Axial Piston Variable Pump | Replaces CAT 444-8539 | 100cc | 3600 PSI
$5,289.00
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Expected delivery Oct 14 - Oct 20
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