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Bosch Rexroth R986110678 (Series 52/53) is an OEM replacement for CAT 444-8540, engineered for direct compatibility and consistent hydraulic performance under rated pressure and speed conditions.
Technical Specifications
Flow Performance
With a 45 cc displacement, R986110678 delivers predictable output per revolution for stable system response and controllable flow characteristics. Performance is maintained across its operating range up to 2600 max speed, supporting repeatable hydraulic actuation where consistent displacement behavior is required.
Efficiency & Durability
Designed to operate at 3600 PSI nominal pressure with 4600 PSI peak capability, the unit maintains performance under high-load demand without exceeding stated pressure limits. Operation up to 2600 max speed supports sustained duty cycles while helping preserve consistent output characteristics under varying operating conditions.
Installation
Configured as a direct OEM replacement for CAT 444-8540, with fitment intended to match the original mounting and interface expectations. Installation is designed to require no modifications when replacing the specified OEM component.
Features and Benefits
- 45 cc displacement: Provides consistent volumetric output per revolution to support repeatable machine response and controllable hydraulic motion.
- 3600 PSI nominal / 4600 PSI peak pressure rating: Supports high-load operation with defined nominal and transient pressure capability for stable performance within rated limits.
- 2600 max speed capability: Enables operation across a broad speed range while maintaining predictable output behavior up to the stated maximum.
Operational Information
Operate within the stated 3600 PSI nominal and 4600 PSI peak pressure limits and up to 2600 max speed to maintain expected performance. The 40 weight and Series 52/53 build are suited for reliable service when integrated into systems designed around these operating constraints.
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 |
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 R986110678, 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 52/53 series components share a 3600 PSI nominal pressure class, so selection is primarily driven by displacement (flow) and any max speed differences within similar piston pumps.
?? 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 |
|---|---|---|---|---|
| R986110678 | 45cc | 3600 PSI | 2600 | 52/53 |
| R986110675 | 72cc | 3600 PSI | 2600 | 52/53* |
| R986110806 | 110cc | 3600 PSI | 2200 | 31* |
| R986110606 | 100cc | 3600 PSI | 2300 | 52/53 |
| R986110066 | 45cc | 3600 PSI | 2600 | 52/53 |
Key Differences
Displacement
R986110678 and R986110066 are 45cc options for lower flow needs, while R986110675 (72cc), R986110606 (100cc), and R986110806 (110cc) increase displacement to support higher flow requirements in the same series.
Pressure Rating
All listed comparison models are rated at 3600 PSI nominal pressure; match nominal and peak pressure requirements to your system (R986110678 is specified at 3600 PSI nominal and 4600 PSI peak).
Speed
Max speed is 2600 for R986110678, R986110066, and R986110675, while higher-displacement alternatives shown have lower max speeds (2300 for R986110606 and 2200 for R986110806), which can matter if your duty cycle runs near speed limits.
Quick Selection Guide
Choose: R986110678
Because: When you need a 45cc displacement unit with 3600 PSI nominal pressure, 4600 PSI peak pressure, and 2600 max speed within the 52/53 series.
Choose: Higher displacement model
Because: When your required flow is higher than a 45cc unit can provide—consider R986110675 (72cc), R986110606 (100cc), or R986110806 (110cc) while confirming the available max speed fits your system.
Choose: Lower pressure model
Because: When the system operates below the 3600 PSI nominal pressure class and a lower-rated component is acceptable (verify against your required nominal and peak pressures).
Compatibility: Verify mounting pattern, shaft configuration, and port sizes match your existing installation.
For application-specific guidance, contact our technical team. If you’re evaluating other hydraulic pumps for similar duty cycles, we can help compare displacement, controls, and mounting details.
Compatibility & Applications
Direct Replacement Information
This Rexroth R986110678 replaces CAT 444-8540 in mobile hydraulic pump applications using an axial piston variable pump.
- Closed-loop or open-circuit hydraulic systems requiring 45cc displacement variable flow control
- Mobile hydraulic circuits operating at 3600 PSI nominal pressure and up to 2600 RPM pump speed
- Axial piston variable pump circuits supporting hydrostatic drive, implement hydraulics, steering, and auxiliary functions
Common Applications
This Bosch Rexroth R986110678 is commonly used in:
- mobile hydraulics
- construction equipment
- agricultural machinery (for related AGCO replacements, see R986111250)
- material handling equipment
- industrial hydraulic power units requiring variable displacement flow
Important: Verify mounting interface, shaft configuration, rotation, control type, and porting match the existing CAT 444-8540 installation before ordering.
Bosch Rexroth R986110678 Axial Piston Variable Pump | Replaces CAT 444-8540 | 45cc | 3600 PSI
$3,033.00
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Expected delivery Oct 13 - Oct 19
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