Regal Velvet Drive 71L Series User Manual

A Regal Brand
www.regalbeloit.com
Marine Transmission
Service Manual
71L & 72L Series
A Regal Brand
1208 Old Norris Road
Liberty, SC 29657
PH: 864-843-9234
FAX: 864-843-1276
EMAIL: sales@velvetdrive.com
www.velvetdrive.com
©2015 Regal-Beloit Corporation 7838V-NP/01-15/??K/TG Printed in the USA
Velvet Drive
®
Transmissions (VDT) has been a leader in the marine industry for over 50 years. Founded in 1948, VDT
has been a Regal company since its purchase from Borg Warner in 1995. VDT products feature quiet, smooth
operation and are manufactured using the highest quality industry standards. Applications include tournament ski
boats, inboard cruisers, sport fishing boats, sailboats, trawlers, center consoles, runabouts, yachts and high
performance boats.
The Liberty Series transmission provides the marine enthusiast the most power density transmission available,
offering more horsepower per cubic inch of space, freeing up more usable boat space where it counts.
Complete Line of Marine Transmissions - Electric Shift Available on Most Models
Series Model Description Ratios Available
71C 1017 In-Line 1.00
71C 1017W In-Line Wakeboard 1.00
72C 1018 High Capacity 1.00, 1.52, 1.88, 2.10, 2.57, 2.91
72V 1005 15 Degree V-Drive Cast Iron 1.21, 1.51, 1.99, 2.50
72L 3007 In Line/Wakeboard 1:1
72L-V 3008 V-Drive/Wakeboard 1.5:1, 1.25:1
72L-X 3011 High Capacity In-Line 1:1
72L-H 3010 High Performance 1:1
72L-HP 3009 High Performance 1:1
Liberty A 3001 8 Degree Down Angle Aluminum 1.00, 1.25, 1.50, 2.00, 2.50, 2.80
Liberty 6000A 3021 8 Degree Down Angle Aluminum 1.00, 1.25, 1.50, 2.00, 2.50, 2.80
Liberty V 2002 12 Degree V-Drive Aluminum 1.25, 1.51, 2.00, 2.50
American Innovation

Regal Velvet Drive 71L Series Specifications

General

Brand	Regal
Model	Velvet Drive 71L Series
Category	Microphone system
Language	English

Summary

Segment A: 71L & 72L / 71LV & 72LV

International Symbols Explained

Explains warning and caution symbols used in the manual for safety and damage prevention.

Section I: Description

Transmission Overview and Operation

Introduction to components, theory of operation, and power flow for 71L/72L transmissions.

Hydraulic Circuit Schematic

Diagram illustrating oil flow, selector valve, and related components for the hydraulic system.

Section II: Inspection

Inspection Procedures and Intervals

Covers general inspection tasks and recommended intervals for routine maintenance.

Section III: Maintenance

Maintenance Tasks and Oil Checks

Details general maintenance, oil level checks, and procedures for adding oil.

Changing Transmission Oil

Provides step-by-step instructions for draining and refilling transmission oil.

Section IV: Troubleshooting

Troubleshooting Guidelines and Common Problems

Offers initial steps and identifies common issues like leaks and malfunctions.

Detailed Troubleshooting Tables

Lists specific problems, causes, and corrections for various transmission issues.

Section V: Overhaul Procedures

Overhaul Preparation and Disassembly

Safety, preparation, and steps for disassembling transmission components.

Component Inspection and Repair

Guidelines for inspecting and repairing transmission parts.

Transmission Assembly Procedures

Detailed instructions for reassembling the transmission components.

Clutch Pack Assembly and End Play

Procedures for assembling clutch packs and setting end play.

Section VI: Installation

Installation Precautions and Shift Adjustment

Covers safety, alignment, and shift cable adjustment for transmission installation.

71L/72L Assembly Diagram and Parts List

Exploded view diagram and parts list for 71L and 72L transmissions.

Section VII: Specifications

Torque Specs and Spring Dimensions

Lists torque values for fasteners and specifications for springs.

Test Pressures

Details expected pressure readings for various taps and engine speeds.

Section VIII: Propeller Shaft Alignment & Flange

Propeller Shaft Alignment Principles

Explains alignment of engine and transmission assembly and related conditions.

Flange and Coupling Specifications

Covers flange perpendicularity, runout, and 5-inch SAE flange details.

SEGMENT B: V-DRIVES

V-Drive Assembly and Parts

Exploded view diagram and parts list for V-Drive transmission assemblies.

V-Drive Gasket and Seal Kits

Lists available gasket and seal kits for V-drive models.

SEGMENT C: 72LH & 72LHP

Assembly Procedures

Details steps for assembling 72LH and 72LHP transmissions, including case and clutch assembly.

Installation Precautions and Adjustments

Covers safety, alignment, and shift cable adjustment for 72LH/72LHP installation.

Segment C Specifications and Parts Lists

Includes pressure readings, torque specs, and parts lists for 72LH/72LHP models.

Rebuild Kits

Clutch and Gasket/Seal Kits

Lists kits for forward clutch, reverse clutch, and gasket/seal requirements.

Solenoid, Adaptor, and Coupler Kits

Details kits for solenoids, coils, connectors, adaptors, and couplers.

American Innovation

Company History and Product Line

Provides company background and an overview of marine transmission models.