CAT 5649801 (564-9801) Piston Pump | Fits 340 345GC 336 374 336MHPU MH3250
CAT 5649801 (564-9801) Piston Pump | Fits 340 345GC 336 374 336MHPU MH3250
CAT 5649801 (564-9801) Piston Pump | Fits 340 345GC 336 374 336MHPU MH3250 Excavator
Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 340, 345GC, 336, 374 excavators and 336MHPU, MH3250 material handlers. Built to deliver consistent hydraulic performance and long service life in demanding mining, quarry, and heavy construction applications.
Product Highlights
- Part Number: 5649801 / 564-9801
- Direct Fit: No modifications required
- High Performance: Meets or exceeds original Caterpillar specifications
- Durable Construction: Precision-engineered for long service life
- Wide Application: Suitable for mining, quarry, and construction projects
Technical Specifications
- Part Number: 5649801 / 564-9801
- Product Type: Variable Displacement Piston Pump
- Brand Compatibility: Caterpillar (CAT)
- Application: Hydraulic System
- Warranty: 12 Months
Compatible Models
This piston pump fits the following Caterpillar machines:
- Caterpillar 340 Excavator
- Caterpillar 345GC Excavator
- Caterpillar 336 Excavator
- Caterpillar 374 Excavator
- Caterpillar 336MHPU Material Handler
- Caterpillar MH3250 Material Handler
Applications
- Excavator Boom and Arm Hydraulic Circuits
- Excavator Bucket and Slewing Functions
- Heavy-Duty Digging and Material Handling Operations
- Mining, Quarry, and Construction Projects
Why Choose This Pump?
- Quality Guaranteed - Manufactured to meet OEM standards
- Ready to Ship - In stock and available for immediate dispatch
- Expert Support - Technical assistance available
- Competitive Pricing - Cost-effective alternative to dealer parts
Frequently Asked Questions
Q: What are the symptoms of a failing hydraulic piston pump on CAT 340, 345GC, 336, 374 excavators or 336MHPU, MH3250 material handlers?
A: Common signs include slow or weak boom, arm, and bucket response, the machine struggling to dig or lift under load, hydraulic oil overheating, whining or knocking noise from the pump area, and visible hydraulic fluid leakage. This pump covers a wide range of machines — from 36-ton 336 excavators to 74-ton 374 excavators and material handlers — so symptoms will vary based on machine size and application intensity.
Q: Does the 5649801 really fit all six models — 340, 345GC, 336, 374, 336MHPU, and MH3250?
A: Yes, the 5649801 (564-9801) is designed as a direct OEM-compatible replacement for the CAT 340, 345GC, 336, and 374 hydraulic excavators, as well as the 336MHPU and MH3250 material handlers. These models share the same pump mounting interface and hydraulic system architecture. Contact us with your machine serial number to confirm exact compatibility — especially important for the 374, which may have configuration variants.
Q: What hydraulic functions does this pump support on excavators vs. material handlers?
A: On excavators (340, 345GC, 336, 374), it supplies flow to boom, arm, bucket, swing, and travel circuits. On material handlers (336MHPU, MH3250), it supports the grapple or magnet handling circuits, boom and stick functions, and swing. A failing main pump causes weak or slow operation across all hydraulic functions simultaneously on either machine type.
Q: Should I flush the hydraulic system when replacing this pump?
A: Always. Flushing is essential — metal contaminants from the old pump can destroy the new pump within hours. Drain and replace all hydraulic oil, flush the system, replace all filters, and refill with fresh Cat HYDO Advanced hydraulic oil. We strongly recommend professional installation by a qualified technician, especially for the 374 class machines.
Q: What type of hydraulic oil is recommended for these machines?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. Material handlers in scrap yards and excavators in mining operate under very different conditions, but both require Cat-approved hydraulic fluids. Using non-approved fluids can cause accelerated wear and void the warranty.
Q: How do I confirm this is the correct pump for my machine?
A: Check the part number on your current pump — if it reads 5649801 or 564-9801, this is the correct replacement. If the label is worn, provide your machine serial number and model and we will verify compatibility before you order.
Q: Does this pump come with mounting hardware or gaskets included?
A: The pump is supplied as a complete unit. Depending on your machine configuration, you may need separate mounting bolts, gaskets, or O-rings. Contact us with your serial number and we will confirm what is included and what additional parts you may need.
Q: What is the warranty on this hydraulic piston pump?
A: This piston pump comes with a 12-month warranty covering manufacturing defects. The warranty does not cover damage caused by contaminated hydraulic oil, improper installation, failure to flush the hydraulic system, or using non-CAT approved hydraulic fluids.
Looking for this hydraulic pump? Contact us today for pricing, availability, and lead time information.
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