SCP-108R-V-DL4-L35-S0S-000
Product Overview
The SCP-108R-V-DL4-L35-S0S-000 is a high-displacement fixed axial piston pump from Sunfab’s SCP series, delivering 108 cm³/rev with a maximum working pressure of 400 bar. It features an HNBR shaft seal rated for the elevated temperatures encountered in PTO-mounted applications, and an aluminum alloy housing that combines lightweight construction with superior heat dissipation and corrosion resistance. The pump conforms to DIN 5462 / ISO 14 spline shaft and DIN 4-bolt mounting flange standards, enabling direct installation on gearbox PTO ports or frame brackets via an intermediate shaft. Every unit undergoes 100% simulated working-condition testing before shipment.
Technical Specifications (Bulleted List)
Full Model Code: SCP-108R-V-DL4-L35-S0S-000
Series: Sunfab SCP Series (SCP 012-108)
Design Type: Fixed displacement axial piston pump (swashplate)
Displacement: 108 cm³/rev
Rotation: Right Hand (R = CW)
Maximum Working Pressure: 400 bar (40 MPa)
Rated Speed: 2,300 rpm (optimised version)
Maximum Speed: 3,000 rpm
Shaft Seal Material: HNBR
Mounting Flange: DIN 4-bolt (ISO 7653D)
Drive Shaft: DIN 5462 / ISO 14 spline
Housing Material: Aluminum alloy
Connection Standard: Sunfab standard
Installation: Direct PTO or frame bracket mount
Key Technical Advantages
1. Lightweight Aluminum Housing with Superior Heat Dissipation
The pump housing is manufactured from die-cast aluminum alloy, significantly reducing weight compared to conventional cast iron housings. The high thermal conductivity of aluminum efficiently transfers internal heat through the housing surface to the ambient environment, effectively lowering operating oil temperature and extending seal and bearing service life.
2. HNBR High-Temperature Shaft Seal for PTO Applications
The shaft seal is manufactured from HNBR (hydrogenated nitrile rubber), specifically engineered to withstand the sustained thermal loads of direct engine PTO mounting. This prevents premature seal aging and leakage failures commonly associated with standard NBR seals in high-temperature PTO environments.
3. Smooth Operation Across the Full Speed Range
Piston assemblies are precision matched-lapped, and the swashplate motion mechanism is dynamically optimized. The pump delivers stable output across the entire speed range — from low-speed startup to high-speed operation — with low flow pulsation and significantly reduced system noise.
4. Standardized Interfaces for Flexible Installation
The DL4 mounting flange conforms to ISO 7653D, and the L35 spline shaft meets DIN 5462 / ISO 14 standards, enabling direct replacement of equivalent imported pumps. The pump supports both direct PTO mounting and frame bracket installation via an intermediate shaft without modifying existing hydraulic system interfaces.
Application Areas
Concrete pump truck boom hydraulic drive systems
Mobile crane slewing and winch hydraulic circuits
Construction vehicle PTO-driven hydraulic systems
Special-purpose vehicle hydraulic power units
Industrial hydraulic power stations requiring high-pressure supply
Expert Maintenance Tips
Pre-Installation Inspection: Verify that the PTO output shaft and pump drive shaft coaxiality deviation does not exceed 0.1 mm. Apply a thin film of lithium-based grease to the spline mating surfaces to reduce fretting wear.
First Startup Air Bleeding: Before initial startup, fill the pump housing with clean hydraulic oil through the case drain port. Run at no-load for 5 minutes to ensure thorough air evacuation before gradually applying load.
Fluid Cleanliness: Maintain system filtration at ISO 4406 18/16/13 or better. Inspect or replace the suction filter element every 500 operating hours.
Housing Temperature Monitoring: Normal housing temperature should range between 60–80°C. If temperature consistently exceeds 90°C, inspect for excessive system back pressure or check cooler operation.
Spline Shaft Periodic Inspection: Every 2,000 operating hours, inspect the spline shaft-to-PTO fit clearance. Replace promptly if significant wear is detected to prevent spline slippage and shaft-end damage.
SCP-034L-N-SB4-B13-S0S-000
Product Overview
The SCP-034L-N-SB4-B13-S0S-000 is a medium-displacement bent axis fixed piston pump from Sunfab’s SCP series, delivering 34 cm³/rev at a rated working pressure of 400 bar. This model features a counter-clockwise (L) rotation direction and is equipped with an SAE-B 4-bolt mounting flange and 13-tooth SAE-B spline shaft, specifically designed for hydraulic systems requiring CCW drive. The bent axis design achieves high power density in a compact envelope, making it ideal for space-constrained mobile hydraulic applications. Every unit is factory-tested to ensure installation dimensions and performance characteristics match the original pump.
Technical Specifications (Bulleted List)
Full Model Code: SCP-034L-N-SB4-B13-S0S-000
Series: Sunfab SCP Series (SCP 012-108)
Design Type: Bent axis fixed displacement axial piston pump
Displacement: 34 cm³/rev
Rotation: Left Hand (L = CCW)
Rated Working Pressure: 400 bar (40 MPa)
Mounting Flange: SAE-B 4-bolt
Drive Shaft: SAE-B 13-tooth spline
Housing Material: Cast steel / cast iron
Installation: Direct PTO or frame bracket mount
Port Standard: Sunfab standard
Key Technical Advantages
1. Compact Bent Axis Design
The bent axis piston pump features a cylinder block at a fixed angle relative to the drive shaft, achieving a smaller overall envelope than swashplate designs at equivalent displacement. This makes it particularly suitable for PTO or construction vehicle hydraulic systems with limited installation space.
2. SAE-B Standard Interface for Broad Compatibility
The SAE-B 4-bolt flange and 13-tooth spline shaft represent the universal standard for North American and global construction vehicle PTO systems, enabling direct replacement of equivalent imported pumps without driveline modification.
3. High Rated Pressure and Durability
The 400 bar rated working pressure satisfies heavy-duty hydraulic system requirements. Piston assemblies and valve plates undergo precision matched-lapping to ensure volumetric efficiency stability under sustained high-pressure operation.
4. Precise Rotation Direction Matching
The counter-clockwise (L) rotation is specifically designed for PTO output directions, preventing pump damage caused by rotation direction mismatch and ensuring correct driveline engagement.
Application Areas
Freightliner M2 106 and similar medium-duty truck PTO hydraulic systems
Concrete pump truck boom hydraulic drive
Mobile hydraulic power units
Construction vehicle auxiliary hydraulic systems
Industrial hydraulic power stations with fixed-displacement supply circuits
Expert Maintenance Tips
Rotation Direction Verification: Before installation, confirm that the PTO output shaft rotation direction matches the L (counter-clockwise) designation in the pump model code. Reverse rotation will cause irreversible damage to the internal piston mechanism.
SAE-B Spline Lubrication: Apply anti-fretting grease to the 13-tooth SAE-B spline shaft before installation. Inspect spline wear every 1,000 operating hours.
System Filtration: Install a 10μm absolute-rated filter element on the pump suction side to maintain fluid cleanliness at ISO 4406 18/16/13 or better.
Pressure Limiting: System relief valve setting should not exceed 420 bar (peak margin) to avoid accelerated piston assembly wear from prolonged overpressure operation.
Case Drain Inspection: Keep the case drain line unobstructed with back pressure not exceeding 0.5 bar. Drain line diameter should be no less than half the main port diameter.
SAP-108R-N-DL4-L35-SOS-000
Product Overview
The SAP-108R-N-DL4-L35-SOS-000 is a high-displacement axial piston pump from Sunfab’s SAP series, delivering 108 cm³/rev at a maximum working pressure of 400 bar. This model is the technical upgrade of the SCP series, maintaining identical functionality and performance while upgrading the housing material to aluminum alloy for significant weight reduction and improved heat dissipation. The SAP series features optimized internal flow passages, achieving lower noise levels and smoother operation at higher speeds (2,300 rpm). It serves as a direct drop-in replacement for SCP series pumps of the same displacement without requiring hydraulic system interface modifications.
Technical Specifications (Bulleted List)
Full Model Code: SAP-108R-N-DL4-L35-SOS-000
Series: Sunfab SAP Series (SCP upgrade)
Design Type: Fixed displacement axial piston pump (swashplate)
Displacement: 108 cm³/rev
Rotation: Right Hand (R = CW)
Maximum Working Pressure: 400 bar (40 MPa)
Rated Speed: 2,300 rpm
Maximum Speed: 3,000 rpm
Shaft Seal Material: HNBR
Mounting Flange: DIN 4-bolt (ISO 7653D)
Drive Shaft: DIN 5462 / ISO 14 spline
Housing Material: Aluminum alloy
Installation: Direct PTO or frame bracket mount
Key Technical Advantages
1. Direct Drop-in Replacement for SCP Series
The SAP series is fully compatible with the SCP series in terms of installation dimensions, interface specifications, and hydraulic performance. It can be directly installed in place of SCP pumps without any modification to the existing hydraulic system, significantly reducing equipment maintenance and upgrade costs.
2. Aluminum Housing Weight Reduction and Thermal Optimization
The housing is upgraded from the SCP’s cast iron to aluminum alloy, substantially reducing weight. The superior thermal conductivity of aluminum efficiently dissipates internal heat through the housing, lowering system thermal load and extending oil and seal service life.
3. Low-Noise Operation at Higher Speeds
The SAP optimized version features redesigned piston trajectories and suction/discharge flow passages. It achieves the same flow output at 2,300 rpm rated speed as the original SCP series at 1,900 rpm, with significantly reduced noise levels.
4. HNBR High-Temperature Shaft Seal for Direct PTO Mounting
The HNBR shaft seal is specifically engineered for the high-temperature conditions of direct engine PTO mounting, withstanding sustained thermal environments and preventing premature seal aging and leakage.
Application Areas
Concrete mixer truck hydraulic drive systems
Construction machinery PTO hydraulic power units
Industrial hydraulic stations with high-pressure, high-flow supply requirements
Marine hydraulic deck machinery
Mining equipment hydraulic drive circuits
Expert Maintenance Tips
Upgrade Replacement Confirmation: When upgrading from SCP to SAP series, verify that the original system’s mounting flange, drive shaft specifications, and port dimensions are fully compatible. The SAP can be directly installed without piping modifications.
Aluminum Housing Protection: Although the aluminum alloy housing offers corrosion resistance, periodically inspect the housing surface coating integrity in humid or corrosive environments to prevent electrochemical corrosion.
First Startup Air Bleeding: Before initial startup, fill the housing with clean hydraulic oil. Run at no-load below 800 rpm for 5–10 minutes. Confirm no abnormal noise before applying load.
Fluid Cleanliness Management: The SAP series precision piston assemblies are highly sensitive to fluid contamination. Maintain system filtration at ISO 4406 18/16/13 or better and replace filter elements every 500 operating hours.
Speed Range Control: Although maximum speed reaches 3,000 rpm, continuous operation below the rated speed of 2,300 rpm is recommended for optimal volumetric efficiency and service life.
