CAT 1879090 (187-9090) Piston Pump | Fits 735 740 Articulated Dump Truck
CAT 1879090 (187-9090) Piston Pump | Fits 735 740 Articulated Dump Truck
CAT 1879090 (187-9090) Piston Pump | Fits 735 740 Articulated Dump Truck
Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 735 and 740 articulated dump trucks. Built to deliver consistent hydraulic performance and long service life in demanding mining, quarry, and heavy material transport applications.
Product Highlights
- Part Number: 1879090 / 187-9090
- 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 heavy material transport projects
Technical Specifications
- Part Number: 1879090 / 187-9090
- 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 articulated dump trucks:
- Caterpillar 735 Articulated Dump Truck
- Caterpillar 740 Articulated Dump Truck
Applications
- Articulated Dump Truck Hoist and Dump Functions
- Articulated Dump Truck Steering and Suspension
- Heavy-Duty Hauling and Dumping Operations
- Mining, Quarry, and Material Transport 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 735 or 740 articulated dump trucks?
A: Common signs include slow or weak hoist and dump response, the dump body hesitating or failing to lift/lower properly, hydraulic oil overheating during heavy hauling cycles, whining or knocking noise from the pump area, and visible hydraulic fluid leakage. The 735 and 740 are large articulated dump trucks used in mining, quarry, and heavy material transport — pump failure causes immediate loss of hauling productivity and can be a safety hazard.
Q: Does the 1879090 fit both the 735 and 740 articulated dump trucks?
A: Yes, the 1879090 (187-9090) is designed as a direct OEM-compatible replacement for both the CAT 735 and 740 articulated dump trucks. These models share the same pump mounting and hydraulic system architecture. Contact us with your truck serial number to confirm exact compatibility.
Q: What hydraulic functions does this pump support on an articulated dump truck?
A: As the main hydraulic pump, it supplies flow to the hoist (dump body lift/lower) circuits, steering system, suspension system, and any auxiliary hydraulic functions. A failing pump causes slow or failed dumping operations — given the 735/740's large payload capacity, pump failure can lead to the dump body becoming stuck in the raised position, creating a serious safety hazard on job sites.
Q: Should I flush the hydraulic system when replacing this pump on an articulated dump truck?
A: Always, and with extra diligence. Articulated dump trucks like the 735 and 740 operate under extreme continuous load in mining and quarry applications. Metal particles and contaminants from the old pump can destroy the new pump within hours. Drain and replace all hydraulic oil, flush the system thoroughly with clean oil, replace all filters, and refill with fresh Cat HYDO Advanced hydraulic oil. Professional installation is strongly recommended.
Q: What type of hydraulic oil is recommended for the 735 and 740 articulated dump trucks?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. For 735/740 dump trucks operating under constant heavy load in mining and quarry applications, using non-CAT approved hydraulic fluids can cause immediate pump failure, accelerated wear, and void the warranty.
Q: How do I confirm this is the correct pump for my articulated dump truck?
A: Check the part number on your current hydraulic pump — if it reads 1879090 or 187-9090, this is the correct replacement. If the label is worn or missing, provide your 735 or 740 serial number 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 dump truck configuration, you may need separate mounting bolts, gaskets, or O-rings. Contact us with your serial number and we will confirm exactly what is included and what additional parts you may need for installation.
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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