246-4486 Motor Grader 14M 16M CCAT Hydraulic Pump Replacement Spare Part Component

The 246-4486 hydraulic pump is a precision-engineered gear-type pump designed as a direct OEM replacement for CCAT Motor Grader 14M and 16M models. Built to exact OEM tolerances, this pump delivers consistent hydraulic flow and pressure to the grader's implement circuits, ensuring reliable blade control, articulation, and steering performance in demanding road construction and earthmoving applications. Every unit undergoes rigorous bench testing to verify flow rate, pressure output, and volumetric efficiency before shipment.

Operators of CCAT 14M and 16M Motor Graders frequently report gradual loss of blade response, sluggish articulation, and erratic steering assistance as the hydraulic pump approaches end-of-life. A worn 246-4486 pump exhibits reduced volumetric efficiency, causing the implement hydraulic system to struggle under load—blade lift speed slows, circle rotation becomes jerky, and the grader fails to maintain consistent grade tolerance. Left unaddressed, pump cavitation damage can introduce metal particulate into the entire hydraulic circuit, contaminating control valves and cylinders downstream. Fleet managers often mistake these symptoms for valve block issues, leading to unnecessary component replacement and extended machine downtime.

Hydraulic pump degradation in the 14M/16M series typically stems from three root causes. First, sustained operation at high system pressure (exceeding 3,500 PSI during heavy grading) accelerates internal gear wear and increases clearance between the gear teeth and housing bore, progressively reducing volumetric efficiency. Second, inadequate filtration—CCAT specifies ISO 4406 cleanliness code 18/16/13 for these machines—allows abrasive particles as small as 5 microns to score gear faces and bearing journals. Third, thermal cycling in extreme environments (desert heat to sub-zero cold) causes differential expansion between the cast iron housing and steel gears, leading to accelerated wear at cold-start conditions when oil viscosity is highest and lubrication film formation is slowest.

The 246-4486 replacement pump addresses these failure modes through multiple design enhancements. Gear sets are manufactured from case-hardened 20CrMnTi alloy steel with surface hardness of HRC 58-62, providing superior wear resistance compared to standard materials. Precision gear profile grinding maintains tooth-to-tooth clearance within 0.015–0.025 mm, optimizing volumetric efficiency above 92% at rated speed. The housing bore is honed to a surface finish of Ra 0.4 μm, ensuring consistent oil film formation and reduced internal leakage. Each pump is dynamically balanced to G6.3 grade (ISO 1940), minimizing vibration-induced fatigue on mounting brackets and coupling splines. Furthermore, every unit is flushed with filtered test oil and pressure-tested at 110% of rated operating pressure before packaging, guaranteeing zero-leak delivery. For installations in high-contamination-risk environments, we recommend pairing this pump with a kidney-loop filtration system rated at β10 ≥ 200 to maintain system cleanliness during operation.

• OEM-Exact Dimensional Fit: Bolt-hole pattern, shaft spline count, and port locations match CCAT original blueprint specifications with ±0.05 mm tolerance, requiring no modifications for installation.
• Case-Hardened Gear Set: 20CrMnTi alloy steel gears hardened to HRC 58-62 surface hardness provide 3x longer service life than non-hardened alternatives in abrasive operating environments.
• Precision-Honed Housing Bore: Honed to Ra 0.4 μm surface finish for optimal oil film retention, reducing internal leakage by up to 15% compared to conventionally machined housings.
• Dynamic Balance Certification: Balanced to ISO 1940 G6.3 grade, ensuring vibration levels below 2.8 mm/s RMS at 2,200 RPM rated speed for extended bearing and seal life.
• 100% Bench Test Verified: Every pump undergoes a 30-minute run-in protocol with flow, pressure, temperature, and volumetric efficiency logged against OEM acceptance criteria.
• Complete Gasket and Seal Kit: Ships with pre-installed shaft seal, O-rings, and mounting flange gasket made from fluorocarbon (FKM) compound rated for -20°C to +120°C continuous operation.

The 246-4486 hydraulic pump is specifically designed for CCAT M-Series Motor Graders, with confirmed fitment on the following models:

• CCAT 14M Motor Grader: Heavy-duty grader with 259 HP net power, used in highway construction, mining haul road maintenance, and large-scale site preparation. The 246-4486 pump supplies the implement hydraulic system controlling the 4.3 m (14 ft) moldboard and rear ripper.
• CCAT 16M Motor Grader: The largest M-Series grader with 297 HP, deployed in open-pit mining and major infrastructure projects. This pump powers blade lift, circle drive, wheel lean, and articulation circuits simultaneously under continuous duty cycle.

Additionally, this pump is suitable for aftermarket replacement in fleet maintenance programs where reducing MTTR (Mean Time to Repair) is critical—the direct bolt-on design allows a trained technician to complete the swap in under 4 hours using standard tools.

When selecting a replacement hydraulic pump for your CCAT Motor Grader, verify the following key identifiers to ensure correct fitment:

1. Confirm Part Number: Cross-reference the original pump part number stamped on the housing flange. The 246-4486 is specific to M-Series graders and is not interchangeable with earlier G/H-Series pump part numbers (e.g., 6E-3137, 6E-3139).
2. Verify Machine Serial Number Prefix: 14M graders use serial prefix B9J or R9J; 16M graders use R9H. Early production units may list superseded part numbers in parts catalogs—always validate against the latest CCAT SIS (Service Information System) revision.
3. Check Shaft Spline Configuration: Confirm the spline count and pitch diameter match your engine-to-pump coupling. M-Series graders use a specific spline profile that differs from earlier models.
4. Inspect Port Orientation: While the bolt pattern is fixed, verify that inlet/outlet port clocking matches your machine's hose routing to avoid interference during installation.
5. Evaluate Operating Environment: For graders operating in extreme dust (mining) or high-moisture (tropical) conditions, specify the heavy-duty seal package option with upgraded FKM shaft seals and stainless steel hardware.

• Q: How can I confirm that my 246-4486 pump needs replacement rather than just a system flush?
  A: Perform a case drain flow test. Connect a flow meter to the pump case drain line and run the machine at operating temperature. If case drain flow exceeds 10% of rated pump output at 2,000 RPM and 2,500 PSI back pressure, internal leakage is excessive and the pump should be replaced. Additionally, if spectrographic oil analysis shows iron (Fe) levels above 150 ppm with concurrent silicon (Si) contamination indicating dirt ingress, the pump is likely the source.
• Q: What is the recommended break-in procedure after installing a new 246-4486 pump?
  A: Fill the pump case with clean hydraulic oil before starting (do not dry-start). After installation, run the engine at low idle (800 RPM) for 5 minutes with no load to circulate oil and purge air. Then cycle all implement functions slowly through their full range 3-5 times. Check for leaks at all connections. Increase to high idle and operate under moderate load for 15 minutes. Replace the hydraulic return filter after the first 50 hours of operation to capture any assembly-related particulate.
• Q: Does this pump come with warranty coverage, and what is your support policy for field installations?
  A: Yes, all 246-4486 pumps carry a 12-month or 2,000-hour warranty (whichever comes first) against manufacturing defects and premature wear under normal operating conditions. We provide installation manuals, torque specifications, and remote video support for field technicians. In the event of a warranty claim, we require a return of the failed unit for forensic teardown analysis; a replacement is shipped within 48 hours of claim approval.
• Q: Can this pump be used with bio-hydraulic oils or fire-resistant fluids?
  A: The standard seal configuration (NBR/FKM) is compatible with mineral oil-based hydraulic fluids (ISO VG 32, 46, 68) and most synthetic ester-based bio-oils. For phosphate ester fire-resistant fluids (HFDR type), please specify the FKM-exclusive seal package at time of order, as standard NBR seals will degrade rapidly when exposed to these fluids.

Each 246-4486 hydraulic pump is individually packaged in an export-grade plywood case lined with closed-cell polyethylene foam. The pump is first vacuum-sealed in anti-rust VCI (Volatile Corrosion Inhibitor) film to prevent oxidation during ocean freight. Ports are capped with desiccant-filled plastic plugs to maintain internal cleanliness. A serial-numbered quality inspection sheet documenting bench test results (flow rate, pressure, volumetric efficiency, case drain flow, temperature stability) is included with every unit. We maintain full traceability from raw material heat lot numbers through final assembly. Custom labeling, private-label packaging, and consolidated bulk packaging options are available for fleet procurement programs and distribution partners.