This document is an installation and maintenance manual for an Automotive Style Clutch, specifically a Mechanical PTO (Power Take-Off) manufactured by WPT Power. The manual provides comprehensive information for the proper installation, operation, maintenance, disassembly, and assembly of this type of clutch.
Function Description:
The WPT Power Automotive Style Clutch is a robust mechanical PTO designed for various industrial applications. Its primary function is to transmit power from an engine to an auxiliary driven component, such as a pump, generator, or other machinery. The clutch allows for engagement and disengagement of the power flow, providing control over the driven equipment. It operates as a dry clutch, meaning it relies on friction between its components to transmit torque. The design incorporates a lever-actuated mechanism for engaging and disengaging the clutch, offering a straightforward operational method. The manual details different styles of these clutches, including "Jeep Style," "Flat Face Flywheel," "GM® Style," and "GM® Style High Sideload," indicating adaptability to various engine and application requirements. The "High Sideload" version suggests an enhanced capability to handle radial loads, which is crucial in applications where the driven shaft experiences significant side forces.
Important Technical Specifications:
The manual outlines several critical specifications and compliance standards for the clutch components:
- Flywheel Housings: Compliant with SAE No. 3, No. 4, GM® style, or JEEP® style standards. This ensures compatibility with a wide range of engines and bellhousing configurations.
- Flywheels: Compliant with SAE J618 spring plate loaded clutches, indicating adherence to industry standards for clutch performance and durability.
- Maximum RPM and Maximum Side Load: While specific numerical values are not provided in the excerpt, the manual emphasizes the importance of referring to the assembly drawing and Bill of Materials for these critical parameters. This highlights that these clutches are designed to operate within defined limits to ensure safety and longevity.
- Flywheel and Flywheel Housing Alignment Tolerances: The manual provides detailed procedures for checking and adjusting these tolerances, which are crucial for smooth operation and preventing premature wear. For example, the flywheel housing bore run out should not exceed 0.010 inches (0.254 mm) for SAE "3" Housing and 0.009 inches (0.229 mm) for SAE "4" Housing. The flywheel face run out should not exceed 0.0005 inches (0.013 mm). These tight tolerances are essential for minimizing vibration and ensuring proper clutch engagement.
- Torque Values: The manual includes extensive charts for torque values for Hex Head Cap Screws (HHCS) and Socket Head Cap Screws (SHCS) in both "As Received" (dry) and "Lubricated" conditions, for Grade 8 and Grade 5 fasteners. These charts are vital for proper assembly, preventing over-tightening or under-tightening of fasteners, which could lead to component failure or improper function. For instance, a 1/2-13 Grade 8 HHCS requires 1890 LB-IN (213 Nm) when lubricated.
- Offset Settings: For certain models, such as WTD-13-130 and WTD-13-133, the factory flywheel offset is set to standard SAE #3. This indicates specific design configurations that must be maintained during installation.
- Alignment Tool and Spacer Details: The manual provides detailed drawings and dimensions for an alignment tool (part number 14522 or 50028) and a flywheel spacer (part number WTD-11-A66). These tools are critical for achieving precise alignment during installation, which is paramount for the clutch's performance and lifespan. The alignment tool has a length of 5.63 inches (142.96 mm) and a diameter of 1.18 inches (29.99 mm) at the splined end. The flywheel spacer has a diameter of 1.02 inches (27.4 mm) and a length of 0.730 inches (18.54 mm).
Usage Features:
The WPT Power Automotive Style Clutch is designed for ease of use and reliability in power transmission applications.
- Mechanical Engagement: The clutch is engaged and disengaged via a mechanical lever, providing direct control to the operator. The manual illustrates the "HANDLE SWING" for engagement and disengagement, indicating a clear operational movement.
- Smooth Operation: Proper installation and maintenance, particularly adherence to alignment tolerances and lubrication guidelines, contribute to smooth clutch engagement and disengagement, minimizing shock loads on the engine and driven equipment.
- Load Management: The manual advises against "bumping-in" to bring the driven load up to speed and recommends engaging the clutch fully to prevent damage. It also specifies that engagement at engine speeds above 1000 rpm can cause damage to driven machinery, emphasizing the importance of proper operating procedures to ensure longevity.
- Versatility: The availability of different styles (Jeep, Flat Face, GM®, High Sideload) indicates the clutch's adaptability to various engine types and application demands, including those requiring enhanced sideload capacity.
- Parts Availability: WPT Power emphasizes that parts are readily available, and customers should use the part number and serial number from the Bill of Materials when ordering to ensure correct component replacement.
Maintenance Features:
The manual provides extensive guidance on maintaining the clutch to ensure its optimal performance and extended lifespan.
- Regular Inspections: The "Inspection" section details checks for flywheel and flywheel housing alignment, bore run out, face run out, and engine crankshaft endplay. These inspections are crucial for identifying potential issues before they lead to major failures.
- Lubrication: The manual highlights the importance of lubrication, particularly for throw-out and throw-out bearing surfaces. It recommends applying a small amount of grease to the ball stud to prevent wear and corrosion. For lithium-based grease, 300°F minimum drop point, No. 2 NGLI is specified. For the GM® Style High Sideload PTO, adding grease during installation to the Labyrinth Seal when replacing it is noted.
- Clutch Adjustment: Procedures for engaging and checking clutch clearance, as well as readjustment, are provided. This ensures that the clutch engages and disengages effectively and prevents slippage or drag.
- Hand Hole Cover Removal: The manual details the removal and replacement of the hand hole cover, which is necessary for inspection and adjustment procedures.
- Component Replacement: Detailed instructions for disassembly and assembly are provided, including removing the PTO from the engine, removing the clutch from the flywheel, and removing the shaft from the PTO housing. This facilitates component replacement when wear or damage occurs.
- Preventive Measures: The manual warns against using unapproved lifting equipment and procedures during installation and maintenance to prevent accidents or injury. It also advises against using the PTO as a lifting device.
- Troubleshooting: While not explicitly a "troubleshooting" section, the maintenance guidelines implicitly help prevent common issues. For example, checking for proper flywheel and flywheel housing alignment helps avoid vibration and premature wear.
- Parts List and Drawings: The inclusion of detailed PTO drawings and parts lists for different clutch styles (11" PTO, 13" PTO, 11" GM® Style, 11" GM® Style High Sideload) is a key maintenance feature. These resources allow technicians to identify specific components, understand their arrangement, and order correct replacement parts, simplifying repairs and ensuring the use of genuine WPT Power components. Each part is assigned a number and description, such as "ASSEMBLY,CLUTCH PLATE," "BRG,THRUST," and "FORK,THROW-OUT," making it easy to identify and locate components.
In summary, the WPT Power Automotive Style Clutch is a robust and versatile mechanical PTO designed for reliable power transmission in industrial settings. Its design emphasizes compliance with industry standards, precise alignment for optimal performance, and comprehensive maintenance procedures to ensure long-term durability and efficient operation.
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