CRUISEMASTER™ DO35 – Drop-On Coupling Technical and Customer Service Guide

Product Overview

The CRUISEMASTER™ DO35 is a leading all-terrain towing technology designed for robust and reliable connection between a vehicle and trailer. It features a unique drop-on coupling mechanism, ensuring a secure and easy hitching experience.

Key Components

• Lock Button: Used to release the lock plate.
• Checklock Dust Cap: Protects the locking mechanism from dust and debris.
• Lock Plate: Secures the tow pin in place.
• M12 Bolts: Torqued to 90Nm (66lbs.ft) or ½” Bolts torqued to 100Nm (74lbs.ft).
• Slotted Nut & Pin: Ensures the coupling's integrity.
• Grease Nipple: For easy lubrication.
• Tow Pin: Available in 7/8” UNF (AU) or 1” UNF (US) sizes.
• Tow Pin Cover: Protects the tow pin when not in use.
• Bumper with High Visibility Indicator: Enhances safety and visibility.

Specifications

• Weight Rating: For use in Australia, ADR rated to 3500kg (7714lb). For use in North America, SAE J684 rated to Class 4 trailers.
• Applicable Patents: 2011101337, 2006207859, 2011253645.

Installation and Operation

Mounting the DO35 Tow Pin

• Australian Couplings: Use a spring washer and 7/8” nut, torque to 440Nm (325lbs.ft).
• American Couplings: Use a spring washer and 1” UNF nut, torque to 530Nm (390lbs.ft).

Bolting the DO35 Coupling onto Trailer Drawbar

Use four new bolts, minimum M12 Class 8.8 or ½” Grade 5, torqued appropriately. Do not weld the coupling to the drawbar. Ensure a drawbar weight between 50kg (110lb) and 350kg (772lb).

Use of Weight Distribution Hitches

Compatible with load distribution hitches as long as the coupling movement is not obstructed and the maximum load is not exceeded.

Hitching Procedure

1. Remove Tow Pin Cover.
2. Clean and lightly lubricate Tow Pin and Universal.
3. Adjust trailer height above vehicle Tow Pin.
4. Push and hold Lock Button, open Lock Plate fully.
5. Align and lower Coupling onto Tow Pin.
6. Release Lock Button to lock the coupling.
7. Attach Checklock cap until it snaps in place.

Maintenance

• Keep Tow Pin and Universal clean and greased.
• Check Tow Pin O-Ring and replace if necessary.
• Lubricate grease points regularly.
• Check bolts for tightness.
• Adjust Slotted Nut & Pin as needed.
• Flush locking mechanism with clean water if it does not open fully.

Safety

• Keep hands clear during attachment.
• Attach trailer safety chains during coupling or uncoupling.
• Do not use for recovery purposes.

Handbrake Attachment

Handbrakes are preassembled on certain models. For others, a handbrake kit (56A-HB-V3) can be purchased and installed following the provided instructions.

Coupling Dimensions

Detailed dimensions are provided for various models, ensuring compatibility and proper installation.

Maintenance and Repair Kits

• Spindle Bush Replacement Kit: 18D DO35 SPINDLE BUSH V3
• Locking Replacement Kit: 18D DO35 REPAIR V3
• Bumper and Dust Cover Replacement Kit: 18D DO35 BUMPER V3
• Yoke and Universal Replacement Kit: 18D DO35 YOKE/UNI V3
• Dustcap Complete with Lanyard: 18D DO35 CAP V3

Coupling Options (Sold Separately)

• Tow Pins: TP-WF (7/8”) and TP-WX (1-1/4”) for Australian market, TP-US for US market.
• Tow Pin Cover: Part Number: 18D-HM-DO35-COV-PIN-V3
• Bi-Lock: Ultimate coupling lock for security, includes dummy pin, two keys, a lock, and a dust cover. Part Number: 18D-DO35-LOCK
• Handbrake Kits: Available for different mounting needs. Contact CRUISEMASTER™ for remote mounting options.

This guide is designed to provide comprehensive technical and operational information for customer service and technical staff, ensuring efficient and effective support for users of the CRUISEMASTER™ DO35 Drop-On Coupling system.