Quick Facts

  • Manufacturer: SAF-Holland
  • Brand: Holland
  • Product Model: FW17
  • Product Type: Lightweight standard-duty commercial fifth wheel
  • Coupling Type: Semitrailer kingpin coupling
  • Configuration: Stationary or sliding, depending on mounting system
  • Maximum Vertical Load: 50,000 pounds
  • Maximum Drawbar Pull: 150,000 pounds
  • Kingpin Compatibility: Standard 2-inch kingpin
  • Locking Design: Swing-lock mechanism
  • Release Type: Manual or optional air release
  • Primary Applications: Line-haul, regional, day-cab, and leasing operations
  • Production Status: Current product family

Overview

The Holland FW17 is a standard-duty commercial fifth wheel designed for line-haul, regional, day-cab, leasing, and other highway tractor applications. Its weight-conscious design provides the capacity required for common semitrailer operations without the additional mass associated with heavier vocational fifth wheels.

The FW17 uses a wide throat to assist trailer coupling and a swing-lock mechanism that captures a standard 2-inch kingpin. A replaceable front lock insert and straightforward lock adjustment support long-term serviceability.

Stationary and sliding mounting assemblies are available. Compatible configurations may also include optional air release and Holland ILS mounting equipment.

Key Characteristics

  • Weight-conscious standard-duty fifth-wheel design
  • Wide throat for easier coupling
  • Swing-lock kingpin-retention mechanism
  • Replaceable front lock insert
  • Simple and fast lock adjustment
  • NoLube articulation-pocket liners
  • Stationary and sliding mounting options
  • Optional air-release mechanism
  • Designed for a standard 2-inch kingpin
  • Suitable for line-haul and regional applications

Major Components

  • Fifth-wheel top plate
  • Wide coupling throat
  • Rear locking jaw
  • Replaceable front lock insert
  • Release handle and linkage
  • Lock-adjustment mechanism
  • Pivot pins
  • NoLube articulation-pocket liners
  • Mounting brackets
  • Slider rails and locking plungers when equipped
  • Air-release cylinder and controls when equipped
  • Mounting fasteners and frame attachments

Coupling Type and Design

The FW17 is a tractor-mounted fifth wheel that couples with a standard 2-inch semitrailer kingpin. Its wide throat helps guide the kingpin toward the locking mechanism as the tractor backs beneath the trailer.

The swing-lock design secures the kingpin through a rear locking jaw and front lock insert. The replaceable front insert provides a serviceable wear component without requiring replacement of the complete top plate.

How the Coupling System Works

As the tractor backs under the trailer, the kingpin enters the fifth-wheel throat and moves into the locking area. The swing-lock mechanism closes around the kingpin and retains it between the rear lock and front insert.

Once properly coupled, the fifth wheel supports part of the trailer’s vertical load and transfers acceleration, braking, and cornering forces between the tractor and trailer. Its mounting brackets permit the top plate to articulate as the combination travels over grades and road transitions.

The driver must visually verify complete lock engagement and perform a tug test before moving the vehicle.

Position and Function Within the Vehicle

The FW17 is mounted above the tractor frame near the drive-axle group. Its position affects tractor-to-trailer clearance and the distribution of trailer weight between the tractor’s steer and drive axles.

The fifth wheel supports the trailer upper coupler, secures the kingpin, permits articulation, and transfers towing and braking forces into the tractor frame.

Common Specifications

  • Maximum Vertical Load: 50,000 pounds
  • Maximum Drawbar Pull: 150,000 pounds
  • Kingpin Size: 2 inches
  • Locking Design: Swing lock
  • Front Lock Component: Replaceable insert
  • Articulation Pockets: NoLube liners
  • Release: Manual or optional air release
  • Mounting: Stationary or sliding
  • Compatible Slider Family: Holland ILS, when properly specified

Fifth-wheel height, slider travel, frame-width code, assembly weight, and mounting arrangement depend on the selected model. The complete FW17 assembly number should be used when confirming specifications.

Load Ratings and Operating Capacity

SAF-Holland rates the FW17 for a maximum vertical load of 50,000 pounds and maximum drawbar pull of 150,000 pounds. These ratings require correct selection, installation, maintenance, and operation within an approved standard-duty application.

The fifth-wheel rating does not automatically establish the tractor’s allowable gross combination weight. The mounting system, frame, axles, suspension, brakes, tires, wheels, and trailer must remain within their individual ratings.

Articulation and Oscillation

The FW17 pivots forward and rearward through its mounting brackets to accommodate normal road grades and tractor-trailer movement. NoLube pocket liners allow this articulation without conventional grease at the articulation pockets.

The FW17 is not a fully oscillating severe-duty fifth wheel. Applications requiring substantial side-to-side movement or extreme off-highway articulation may require a different fifth wheel and mounting system.

Sliding and Adjustment System

Sliding FW17 installations allow the fifth wheel to move forward or rearward along frame-mounted rails. Changing its position can adjust axle-weight distribution and tractor-to-trailer clearance.

The Holland ILS system can provide inboard or outboard mounting, multiple slider-travel lengths, different bracket heights, and air-operated slide release. Both locking plungers must be fully engaged before road operation.

This section does not apply to stationary FW17 installations.

Release and Locking Mechanism

The FW17 uses a swing-lock mechanism to retain the kingpin. A replaceable front lock insert works with the rear locking jaw to capture the kingpin and provide a serviceable contact area.

The lock can be adjusted to compensate for normal wear. Standard configurations use a manual release handle, while compatible assemblies may include an optional air-operated release.

Air and Electronic Controls

A standard manual-release FW17 does not require air or electronic controls. Optional air release uses the tractor’s compressed-air system, a control valve, air lines, and a pneumatic actuator to open the fifth-wheel lock.

Sliding mounting systems may also use air-operated locking plungers. The exact controls and interlocks depend on the selected mounting and release configuration.

Mounting and Installation

The FW17 may be installed on approved stationary or sliding mounting assemblies. Installation must account for frame width, mounting height, bracket design, fastener specifications, axle clearance, suspension movement, and tractor-to-trailer clearance.

Mounting brackets, frame attachments, welding, drilling, and fastener installation must follow the instructions for the exact FW17 assembly. Unapproved modifications can reduce mounting strength and coupling reliability.

Vehicle Frame and Mounting Compatibility

Compatibility depends on the tractor manufacturer, model, frame width, rail dimensions, crossmembers, drive-axle position, suspension travel, fifth-wheel height, slider travel, and intended trailer.

The complete fifth-wheel assembly—including the top plate, brackets, slider, mounting angles, fasteners, and tractor frame—must support the intended application.

Mating Component and Trailer Compatibility

The FW17 is designed for a properly installed and serviceable SAE-compatible 2-inch trailer kingpin. The trailer upper-coupler plate must be structurally sound, sufficiently flat, and compatible with the fifth-wheel surface.

Bent, worn, improperly sized, or loosely mounted kingpins can prevent correct coupling. Upper-coupler damage, excessive lube-plate thickness, contamination, and incorrect trailer height can also interfere with lock engagement.

Common Applications

  • Line-haul highway tractors
  • Regional-haul tractors
  • Day-cab tractors
  • Leasing and rental fleets
  • Dry-van trailers
  • Refrigerated trailers
  • Standard flatbed trailers
  • General freight operations
  • Weight-conscious tractor configurations

Advantages

  • Weight-conscious standard-duty design
  • Wide throat assists coupling
  • Replaceable front lock insert
  • Fast lock adjustment
  • NoLube articulation-pocket liners
  • Stationary and sliding mount options
  • Optional air release
  • Compatible with a standard 2-inch kingpin
  • Suitable for common highway operations
  • Replaceable locking and wear components

Limitations or Considerations

  • Lower vertical-load rating than heavier FW35 and FW70 models
  • Not intended to replace a severe-duty or fully oscillating fifth wheel
  • Requires scheduled cleaning, lubrication, and inspection
  • Incorrect trailer height can cause high coupling
  • Slider assemblies add weight and maintenance points
  • Air-release systems require a dependable air supply
  • Not every mounting system fits every tractor frame
  • The fifth-wheel rating does not override other vehicle ratings

Driver and Operator Experience

The wide throat is designed to help guide the trailer kingpin into the locking area during a properly aligned coupling. The release and lock-adjustment systems are intended to support straightforward operation and service.

Drivers must still confirm correct trailer height, visually inspect lock engagement, perform a tug test, and verify that any slider plungers are fully engaged.

Coupling and Uncoupling Procedure

Before coupling, inspect the fifth wheel, mounting system, locking mechanism, kingpin, upper coupler, slider locks, lubrication, and optional air-release equipment.

  1. Confirm that the coupling area is level and clear.
  2. Verify that the fifth-wheel lock is ready to receive the kingpin.
  3. Align the tractor with the trailer kingpin.
  4. Confirm that the trailer is at the correct coupling height.
  5. Back under the trailer slowly and in a straight line.
  6. Complete the coupling and set the parking brakes.
  7. Visually inspect the lock around the kingpin.
  8. Confirm that the release handle is in its locked position.
  9. Perform a tug test.
  10. Connect the air and electrical lines and complete a walk-around.

This overview does not replace SAF-Holland instructions, fleet procedures, or driver training.

Inspection and Wear Points

  • Rear locking jaw
  • Replaceable front lock insert
  • Kingpin contact surfaces
  • Fifth-wheel throat
  • Top-plate surface and grease grooves
  • Release handle and linkage
  • Lock-adjustment mechanism
  • Pivot pins and NoLube liners
  • Mounting brackets and fasteners
  • Slider rails and locking plungers
  • Air lines and actuator when equipped
  • Trailer kingpin and upper coupler

Lubrication Requirements

The fifth-wheel top surface and locking mechanism require the lubricant specified by SAF-Holland. Old grease, dirt, and road debris should be removed as required before fresh lubricant is applied.

NoLube articulation-pocket liners reduce lubrication requirements between the top plate and mounting brackets. They do not eliminate lubrication requirements elsewhere in the assembly.

Maintenance and Ownership Notes

Routine maintenance should include cleaning, lubrication, lock inspection, lock adjustment, mounting-fastener checks, slider inspection, and examination of the tractor frame and trailer upper coupler.

The replaceable front lock insert, locking jaw, handle components, bracket connections, and slider parts should be identified using the exact FW17 model before replacement parts are ordered.

Common Coupling Problems

  • High coupling: The kingpin enters above the locking mechanism because the trailer is positioned too high.
  • Failure to lock: Improper alignment, contamination, damaged parts, incorrect kingpin dimensions, or lock maladjustment can prevent engagement.
  • Difficult release: Tractor-to-trailer pressure, insufficient lubrication, damaged linkage, or mechanical binding may prevent release.
  • Excessive kingpin movement: A worn front insert, locking jaw, kingpin, or improperly adjusted lock can create excessive play.
  • Slider will not move: Engaged plungers, low air pressure, contamination, damaged rails, or binding can prevent adjustment.
  • Slider plungers will not engage: Misalignment, damaged teeth, debris, or an air-system problem may prevent full engagement.
  • Air-release failure: Low pressure, damaged air lines, valve failure, actuator trouble, or mechanical binding can prevent release.

Safety and Service Precautions

Never place any part of the body between an unsecured tractor and trailer. Set the parking brakes, chock the trailer wheels, and follow approved support and lockout procedures before inspection or service.

Never operate the vehicle without visually confirming complete kingpin engagement and performing a tug test. Air-release equipment does not replace physical coupling verification.

Identification Information

Record the following information before ordering replacement parts or another fifth-wheel assembly:

  • Complete FW17 assembly number
  • Top-plate model number
  • Serial or production information
  • Generation or production series
  • Manual or air-release configuration
  • Stationary or sliding mounting
  • Nominal fifth-wheel height
  • Slider travel
  • Frame-width and mounting codes
  • Lock-insert and rebuild-kit identification

Buying Considerations

  • Confirm the required vertical-load and drawbar-pull ratings.
  • Verify that the application qualifies as standard duty.
  • Choose between stationary and sliding mounting.
  • Determine the required fifth-wheel height and slider travel.
  • Verify tractor-frame and mounting compatibility.
  • Select manual or optional air release.
  • Confirm compatibility with the trailer’s 2-inch kingpin.
  • Check tractor-to-trailer clearance.
  • Verify replacement-parts availability for the exact generation.
  • Compare weight savings with application requirements.

Variants and Configurations

  • Stationary FW17
  • Sliding FW17
  • Manual-release configuration
  • Air-release configuration
  • Inboard mounting
  • Outboard mounting
  • Holland ILS mounting configurations
  • Different fifth-wheel heights
  • Different slider-travel lengths
  • Production-generation-specific top plates and service components

Comparison to Similar Equipment

Compared with the Holland FW35 Fifth Wheel, the FW17 has a lower maximum vertical-load rating and is focused more heavily on standard-duty highway applications.

Compared with the Holland FW33 Low-Lube Fifth Wheel, the FW17 does not use the FW33’s replaceable Low-Lube top-plate system.

Compared with the Holland FWAL Aluminum Fifth Wheel, the FW17 provides a conventional fifth-wheel alternative without the FWAL’s aluminum top plate.

Best Fit For

  • Line-haul fleets
  • Regional-haul operations
  • Day-cab tractors
  • Leasing and rental fleets
  • General freight operations
  • Weight-conscious standard-duty tractors
  • Vehicles requiring stationary or sliding mounting
  • Fleets wanting optional air release

Related Vehicle and Trailer Types

Related Truck and Trailer Models

Related Coupling Types

Related Coupling Products

Related Equipment Systems

Related Guides

Regulatory and Compliance Notes

Installation and operation must comply with applicable commercial-vehicle regulations, inspection requirements, vehicle-manufacturer instructions, and coupling-equipment standards.

The fifth wheel, mounting system, tractor frame, trailer kingpin, upper coupler, suspension, axles, tires, wheels, and brakes must remain within their respective ratings. Slider adjustment does not increase certified vehicle capacity.

Real World Operating Notes

The FW17 is best matched to standard-duty highway applications where weight, serviceability, and normal semitrailer compatibility are primary concerns.

Correct trailer height is essential. A trailer that is too high can allow the kingpin to pass above the locking mechanism and create a dangerous high-coupling condition.

Road salt, hardened grease, dirt, and ice can restrict the lock and release mechanism. Inspection and cleaning become especially important during winter operation.

Frequently Asked Questions

What is the Holland FW17?

The FW17 is a standard-duty fifth wheel designed for common line-haul, regional, day-cab, leasing, and highway tractor applications.

What is the FW17 vertical-load rating?

SAF-Holland lists a maximum vertical load of 50,000 pounds.

What is its maximum drawbar pull?

The listed maximum drawbar-pull rating is 150,000 pounds.

What kingpin size does the FW17 use?

It is designed for a standard 2-inch semitrailer kingpin.

Is the FW17 available with a slider?

Yes. Stationary and sliding mounting options are available.

Can the FW17 use an air release?

Yes. SAF-Holland offers an optional air-operated lock-release mechanism for compatible FW17 configurations.

Does the FW17 require lubrication?

Yes. The top-plate surface and locking mechanism require specified lubrication. NoLube pocket liners reduce lubrication needs at the articulation pockets.

Can the front lock insert be replaced?

Yes. The front lock insert is designed as a replaceable service component.

How can the correct replacement parts be identified?

Use the complete assembly number, top-plate number, production generation, mounting type, release configuration, fifth-wheel height, and slider travel.

Availability and Where to Find

The Holland FW17 and its replacement components may be available through SAF-Holland dealers, commercial-truck dealers, heavy-duty parts suppliers, fleet-maintenance suppliers, fifth-wheel specialists, and truck repair facilities.

Availability depends on mounting style, fifth-wheel height, slider travel, frame width, release configuration, and production generation. Verify the complete model number before ordering.

Current product information, technical literature, parts resources, and dealer support are available through the official SAF-Holland FW17 product page.

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