CAT 2191965 (219-1965) Piston Pump | Fits 776D 777D Off-Highway Truck
CAT 2191965 (219-1965) Piston Pump | Fits 776D 777D Off-Highway Truck
CAT 2191965 (219-1965) Piston Pump | Fits 776D 777D Off-Highway Truck
Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 776D and 777D off-highway trucks. Built to deliver consistent hydraulic performance and long service life in demanding mining, quarrying, and heavy haul applications.
Product Highlights
- Part Number: 2191965 / 219-1965
- 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, quarrying, and heavy haul projects
Technical Specifications
- Part Number: 2191965 / 219-1965
- 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 off-highway trucks:
- Caterpillar 776D Off-Highway Truck
- Caterpillar 777D Off-Highway Truck
Applications
- Off-Highway Truck Body Raise and Lower Functions
- Off-Highway Truck Steering and Braking Systems
- Off-Highway Truck Hauling and Dumping Operations
- Mining, Quarrying, and Heavy 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 776D or 777D off-highway trucks?
A: Common signs include slow or weak body raise and lower 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 776D and 777D are large off-highway trucks used in mining and heavy construction — pump failure causes immediate loss of hauling productivity and can be a safety hazard if the dump body becomes stuck.
Q: Does the 2191965 fit both the 776D and 777D off-highway trucks?
A: Yes, the 2191965 (219-1965) is designed as a direct OEM-compatible replacement for both the CAT 776D and 777D off-highway 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 off-highway truck?
A: As the main hydraulic pump, it supplies flow to the dump body hoist (raise/lower) circuits, steering system, and braking systems. A failing pump causes slow or failed dumping operations — given the 776D/777D'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 off-highway truck?
A: Always, and with extra diligence. Off-highway trucks like the 776D and 777D operate under extreme continuous load in mining and heavy construction 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 776D and 777D off-highway trucks?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. For 776D/777D off-highway trucks operating under constant heavy load in mining and heavy construction, 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 off-highway truck?
A: Check the part number on your current hydraulic pump — if it reads 2191965 or 219-1965, this is the correct replacement. If the label is worn or missing, provide your 776D or 777D 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 off-highway 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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