Multiquip 21604 Document Box Spacer

The Multiquip 21604 Document Box Spacer is a genuine OEM component designed for HTX44 and STX55 series hydrostatic ride-on power trowels. This factory-sourced spacer ensures the document box is correctly positioned and secured on the machine, maintaining the structural integrity of the operator documentation housing. It is a direct-fit replacement verified for HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, STX55J6, and STX55Y6 models. When worn or missing, the document box may shift, rattle, or fail to seat properly, making this small but essential hardware component worth keeping on hand.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's exact dimensional tolerances, ensuring the spacer seats flush and holds the document box securely without play or flex.
• Direct-Fit Hardware — Installs into the document box mounting location on HTX and STX series trowels without reworking or adapting surrounding components.
• Broad HTX and STX Series Fitment — Confirmed compatible with HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, STX55J6, and STX55Y6 hydrostatic ride-on power trowels.
• Maintains Operator Documentation Integrity — Keeps safety and operational documentation properly housed and accessible on the machine, supporting compliance with equipment operating standards.
• Long-Term Hardware Durability — OEM material specification means the spacer resists the vibration and environmental exposure typical of concrete finishing work without deforming or degrading.

The document box spacer is a precision hardware component that maintains the correct clearance and alignment between the document box housing and its mounting surface on the trowel frame. Without the proper spacer in place, the document box can shift under machine vibration, leading to wear on surrounding fasteners or loss of the operator documentation stored inside. On ride-on power trowels like the HTX44 and STX55 series, which operate in demanding concrete finishing environments, keeping all mounting hardware correctly fitted contributes to overall machine serviceability and operator access to critical reference materials.

For questions about fitment or to confirm compatibility with your specific unit, contact the DHS Equipment team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.