This document is a parts manual for the Koyker KB75 Backhoe, an agricultural implement designed for excavation tasks. The manual provides detailed diagrams and schedules for various components of the backhoe, aiding in identification, ordering, and maintenance of parts.
Function Description:
The Koyker KB75 Backhoe is an attachment designed to perform digging and excavation operations, typically mounted on a tractor or similar utility vehicle. Its primary function is to dig trenches, foundations, and perform other earth-moving tasks. The backhoe utilizes a hydraulic system to power its boom, dipper, bucket, and stabilizers, allowing for precise control and efficient operation. The design incorporates a swing mechanism for lateral movement of the boom, enabling the operator to deposit excavated material to the side of the trench. Stabilizers are included to provide a stable platform during operation, preventing the host vehicle from tipping or shifting.
Important Technical Specifications:
The manual details various components and their specifications, which collectively define the technical characteristics of the KB75 Backhoe.
- Hydraulic System: The backhoe relies on a robust hydraulic system. The manual lists different hydraulic hoses, fittings, and cylinders, indicating the pressure ratings and sizes. For instance, hydraulic hoses are specified with sizes like 8P-50" (part no. 667254) and 6P2-85" (part no. 667255), suggesting varying lengths and pressure capacities. The system includes independent hydraulic components, with separate parts diagrams for 540 RPM and 1000 RPM pump systems (pages 12 and 13), indicating adaptability to different tractor PTO speeds. Key hydraulic components include an oil reservoir (part no. 667350), filter screen (part no. 667351), and various pump adapters (e.g., 6400-20-12 Pump Adapter, part no. 667355).
- Cylinders: The backhoe utilizes several hydraulic cylinders for its movements. These include:
- 2-1/2" x 14" Dipper Cylinder (part no. 667213)
- 2-1/2" x 10" Stabilizer Cylinder (part no. 667217)
- 2-1/2" x 20" Boom Cylinder (part no. 667210)
- 2-1/2" x 14" Bucket Cylinder (part no. 667212)
- 2-1/2" x 10" Swing Cylinder (part no. 668245 LH, 667214 RH)
Each cylinder assembly includes components such as a barrel, cap screw, dyna seal, piston, piston seal, internal lock washer, cylinder head, back-up ring, O-ring, lockwire, rod seal, rod wiper, rod assembly, and a seal kit. The consistent bore size (2-1/2") across different cylinders suggests a standardized hydraulic pressure and flow requirement for optimal performance.
- Valve System: The manual includes diagrams for the KB60/KB75 Valve Control Diagram and the Racine Six Section Valve. The valve system is crucial for controlling the hydraulic flow to the cylinders. Key components include the main control base (part no. 667269), main control lever (part no. 665609), spherical links (part nos. 667270, 667271), and various control trunions (part nos. 667273, 667274). The Racine Six Section Valve schedule details components like the #10 S.A.E. Plug Assembly (part no. 667300), inlet and outlet manifold sections (part nos. 667301, 667302, 667304), direct relief valve cartridges (part nos. 667305, 667312), and various O-rings and springs. This intricate valve system allows for precise and independent control of each backhoe function.
- Structural Components: The backhoe's structure is built from robust steel components. The main frame weld assembly (part no. 667200), swing mast weld assembly (part no. 667201), boom weld assembly (part no. 667202), dipper stick weld assembly (part no. 667203), and boom lock (part no. 667204) are critical for the backhoe's structural integrity and operational stability. Stabilizer arms (part no. 667205) and pads (part no. 667206) are essential for stabilizing the unit during digging.
- Mounting and Attachment: The manual references a draw bar bracket and 3-point stabilizer kit (part no. 667287), indicating that the backhoe is designed to be attached to a tractor's 3-point hitch system. Components like the U-bolt (part no. 667288), spacer bar (part no. 667289), and adjustable stabilizer linkage (part no. 667290) facilitate secure attachment and stability. Hitch pins (part nos. 667292, 667247) and a locking bar assembly (part no. 664329) are also listed for secure connection.
Usage Features:
The design of the KB75 Backhoe emphasizes ease of operation and maintenance through its modular construction and detailed parts identification.
- Operator Controls: The presence of a "Seat" (part no. 667252) and "Seat Base" (part no. 667211) suggests an integrated operator station, providing comfort and accessibility to controls. The "Main Control Base" and "Main Control Lever" (part nos. 667269, 665609) indicate a user-friendly interface for operating the backhoe's functions.
- Versatility: The availability of different cylinder sizes for the dipper, boom, bucket, and swing functions allows for a range of digging depths and reach capabilities. The independent hydraulic system, with options for 540 RPM and 1000 RPM, ensures compatibility with various tractor models and power take-off (PTO) configurations.
- Stabilization: The inclusion of stabilizer arms and pads, along with an adjustable stabilizer linkage, ensures that the backhoe remains stable during heavy digging operations, enhancing safety and efficiency.
Maintenance Features:
The manual is primarily a maintenance tool, providing comprehensive information for servicing the KB75 Backhoe.
- Parts Identification: The core of the manual is the "Parts Identification Schedule," which lists every component with a unique part number, description, and quantity. This allows owners and technicians to quickly identify and order replacement parts. For example, bushings are listed with specific dimensions (e.g., 1-1/4" x 1-1/4", part no. 667207), ensuring correct fitment.
- Diagrams: Detailed diagrams for the backhoe, hydraulic system, valve system, and individual cylinders simplify the process of assembly, disassembly, and troubleshooting. These visual aids are crucial for understanding the relationships between different components.
- Cylinder Warranty Information: The manual includes a dedicated section on "Cylinder Warranty," outlining the terms and conditions for warranty claims. It specifies that all cylinder claims must be handled by Koyker Dealers or Distributors and that any defective cylinder reported within one year of sale to the original purchaser will be replaced or repaired. It also details the process for returning goods (RGA - Returned Goods Authorization Number) for repair or replacement, emphasizing the importance of proper inspection and documentation. This section highlights Koyker's commitment to product support and provides clear guidelines for addressing potential issues.
- Contact Information: The manual provides contact information for Koyker Manufacturing Company, including a phone number and email address (1-800-456-1107, koyker@koykermfg.com), facilitating direct communication for parts orders, technical support, and warranty claims.
- Preventive Maintenance: While not explicitly detailing maintenance schedules, the comprehensive parts list and diagrams implicitly support preventive maintenance by enabling easy replacement of worn components before they lead to major failures. For example, the inclusion of various seals, O-rings, and bushings suggests that these wear items are expected to be replaced periodically.
Need help?
General
To Next Page