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: [phone]
EMAIL: [email protected]
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

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T R A N S M I S S I O N S
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Transmission
Assembly
Number
Family
Group
Transmission Ratios
CommentsForward Reverse
3007000M01 72L 1:1 1.10:1 MANUAL SHIFT
3007000E01 72L 1:1 1.10:1 ELECTRIC SHIFT
3008000M01 72LV 1.50:1 1.65:1 MANUAL SHIFT V-DRIVE (FRONT MOUNT)
3008000M02 72LV 1.25:1 1.37:1 MANUAL SHIFT V-DRIVE (FRONT MOUNT)
3008000M03 72LV 2.00:1 2.20:1 MANUAL SHIFT V-DRIVE (FRONT MOUNT)
3008000MT1 72LVTS 1.50:1 1.65:1 MANUAL SHIFT V-DRIVE (THRU SHAFT)
3008000MT2 72LVTS 1.25:1 1.37:1 MANUAL SHIFT V-DRIVE (THRU SHAFT)
3008000MT3 72LVTS 2.00:1 2.20:1 MANUAL SHIFT V-DRIVE (THRU SHAFT)
3008000E01 72LV 1.50:1 1.65:1 ELECTRIC SHIFT V-DRIVE (FRONT MOUNT)
3008000E02 72LV 1.25:1 1.37:1 ELECTRIC SHIFT V-DRIVE (FRONT MOUNT)
3008000E03 72LV 2.00:1 2.20:1 ELECTRIC SHIFT V-DRIVE (FRONT MOUNT)
3008000ET1 72LVTS 1.50:1 1.65:1 ELECTRIC SHIFT V-DRIVE (THRU SHAFT)
3008000ET2 72LVTS 1.25:1 1.37:1 ELECTRIC SHIFT V-DRIVE (THRU SHAFT)
3008000ET3 72LVTS 2.00:1 2.20:1 ELECTRIC SHIFT V-DRIVE (THRU SHAFT)
3009000M01 72LHP 1:1 1.10:1 MANUAL SHIFT
3009000M06 72LHP 1:1 1.10:1 MANUAL SHIFT MERC 6 CLOSE COUPLE
3009000E01 72LHP 1:1 1.10:1 ELECTRIC SHIFT
3009000E06 72LHP 1:1 1.10:1 ELECTRIC SHIFT MERC 6 CLOSE COUPLE
3010000M01 72LH 1:1 1.10:1 MANUAL SHIFT
3010000M06 72LH 1:1 1.10:1 MANUAL SHIFT MERC 6 CLOSE COUPLE
3010000E01 72LH 1:1 1.10:1 ELECTRIC SHIFT
3010000E06 72LH 1:1 1.10:1 ELECTRIC SHIFT MERC 6 CLOSE COUPLE
3011000M01 72LX 1:1 1.10:1 MANUAL SHIFT
3011000M06 72LX 1:1 1.10:1 MANUAL SHIFT MERC 6 CLOSE COUPLE
3011000E01 72LX 1:1 1.10:1 ELECTRIC SHIFT
3011000E06 72LX 1:1 1.10:1 ELECTRIC SHIFT MERC 6 CLOSE COUPLE
3018000M01 71LV 1.5 1.5 MANUAL SHIFT V-DRIVE (FRONT MOUNT)
3018000M02 71LV 1.25 1.25 MANUAL SHIFT V-DRIVE (FRONT MOUNT)
3018000MT1 71LVTS 1.5 1.5 MANUAL SHIFT V-DRIVE (THRU SHAFT)
3018000MT2 71LVTS 1.25 1.25 MANUAL SHIFT V-DRIVE (THRU SHAFT)
3018000E01 71LV 1.5 1.5 ELECTRIC SHIFT V-DRIVE (FRONT MOUNT)
3018000E02 71LV 1.25 1.25 ELECTRIC SHIFT V-DRIVE (FRONT MOUNT)
3018000ET1 71LVTS 1.5 1.5 ELECTRIC SHIFT V-DRIVE (THRU SHAFT)
3018000ET2 71LVTS 1.25 1.25 ELECTRIC SHIFT V-DRIVE (THRU SHAFT)
3019000M01 71LV 1:1 1:1 MANUAL SHIFT
3019000E01 71LV 1:1 1:1 ELECTRIC SHIFT
Models Covered In This Manual

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T R A N S M I S S I O N S
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SEGMENT A: 71L & 72L / 71LV & 72LV
Section Page
I Description
Introduction 5
Theory of Operation 5
II Inspection
General 8
Scheduled Inspection 8
III Maintenance
General 9
Lubrication 9
IV Troubleshooting
General 11
Guidelines 11
V Overhaul
General 14
Disassembly 14
Cleaning 14
Inspection 14
Repair 14
Assembly 15
VI Installation 25
VII Specification 34
VIII Propeller Shaft Alignment &
Five Inch Flange Specifications 36
SEGMENT B: V-DRIVES
Section Page
I General 39
II Repair Kits 43
SEGMENT C: 72LH & 72LHP
Section Page
I Overhaul 45
Assembly 46
II Installation 55
III Specification 56
IV Propeller Shaft Alignment 36
Rebuild Kits 61
Table of Contents

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T R A N S M I S S I O N S
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Table of Contents
Title Page
List of Tables
1 Technical Specifications Models 3007, 3008, 3011, 3018 & 3019................................34
Technical Specifications Models 3009 & 3010 ...............................................56
2 Scheduled Inspections ..................................................................8
3 Troubleshooting ......................................................................11
4 Bolt and Fastener Torques (Non-Lubricated) ...........................................34 & 56
5 Test Pressures Models 3007, 3008, 3011, 3018 & 3019 .......................................34
Test Pressures Models 3009 & 3010 ......................................................56

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The following international symbols are used in this service manual.
This symbol warns of possible personal injury
This symbol warns of possible damage to transmissions.
OEM Original Equipment Manufacturer (Boat/Engine Manufacturer)
WARNING
CAUTION
SEGMENT A
71L & 72L / 71LV & 72LV
71L AND 72L 72LX 72LH AND 72LHP
71LV AND 72LV
71LVTS AND 72LVTS
71L AND 72L 72LX 72LH AND 72LHP
71LV AND 72LV
71LVTS AND 72LVTS

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T R A N S M I S S I O N S
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Section I Description
INTRODUCTION (see figure 1)
The 71L and 72L transmissions consist of a planetary
gear set and multiple disc clutches. The input and out-
put shafts are in line.
Hydraulic pressure is provided by a crescent type
pump. The pump is driven at engine speed by the input
shaft. Oil from the pump is sent to the control valve.
The positions on the control valve are forward-neutral-
reverse. An internal regulator valve controls system
pressure. Oil discharged by the regulator valve is sent
to the oil cooler.
THEORY OF OPERATION
General: Forward is direct drive. A planetary gear set
(1.1 to 1.0 ratio for 72L and 1.0 to 1.0 ratio for 71L) is
used to obtain reverse.
Figure 1. 71L & 72L Transmission Assembly
Description Model
71L
Model
72L
Model 71LV
& 71LVTS
Model 72L
& 72LVTS
Model
72LX
Model
72LH
Model
72LHP
Speeds Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Approx. Wt. 67 71 113 117 71 85 87
Table 1. Technical Specifications
ID TAG ID TAG ID TAG
71L AND 72L 72LX 72LH AND 72LHP
71LV AND 72LV
71LVTS AND 72LVTS
ID TAG ID TAG
3007 & 3019
3018 & 3008 3018 & 3008
3010 & 30093011

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Section I Description
The transmission oil pump is driven by the input shaft.
It supplies oil pressure to operate the clutch packs,
lubricate parts, and provide cooling.
A damper plate is bolted to the engine flywheel. The
damper plate is splined to connect to the input shaft.
The damper plate reduces torsional vibrations to the
transmission from the engine (see figure 2).
Forward: The forward clutch is applied hydraulically
when the shift lever is placed in the forward position.
This connects the input shaft to the output shaft. The
unit then transmits power at a 1 to 1 speed ratio in the
same direction of rotation as the engine (see figure 3).
Reverse: The reverse clutch is applied hydraulically
when the shift level is placed in the reverse position
(see figure 4). The applied clutch holds the ring gear.
The input shaft and sun gear, driven by the engine,
drive pinions, which drive the carrier output shaft. The
output shaft turns opposite to engine rotation at a 1.1
to 1 speed reduction ratio for model 72L and 1 to 1
speed ratio for model 71L.
Figure 2. Typical Assembly Figure 4. Reverse Power Flow
Figure 3. Forward Power Flow
CAUTION - TRANSMISSION FACE MUST BE
CLEAN AND FREE OF DEBRIS OR PAINT. STONE
FACE TO REMOVE ANY HANDLING DAMAGE
BEFORE INSTALLATION.
TRANSMISSION

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T R A N S M I S S I O N S
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Section I Description
Hydraulic Circuit: Oil from the sump enters the pump
suction passage and is directed to the pump (see figure
5). The pump supplies oil under pressure through pas-
sages to the control and regulator valves.
Oil pressure on the eng of the regulator valve moves
the valve, compressing the spring. This movement
allows oil to flow to the cooler.
Selector Valve: The selector valve shifts the transmis-
sion from neutral to forward or reverse. When selector
valve is placed in the forward position, oil is directed to
the forward clutch. When the selector valve is placed in
reverse position, oil is fed to the reverse clutch. When
one clutch is engaged the other is exhausted by a slot
in the selector valve. Electric shift versions forward and
reverse are controlled by an electric solenoid.
Figure 5. Hydraulic Circuit Schematic
Model 71L & 72L (Electric Shift Shown)

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T R A N S M I S S I O N S
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Section II Inspection
GENERAL
The transmission, cooler, cooler lines, and control link-
age should be inspected at regular intervals. Regular
inspections will ensure proper operation and help
detect minor problems that can be corrected before
they cause a transmission failure.
SCHEDULED INSPECTIONS (see table 2)
The following recommended inspection intervals are
based on normal operating conditions. Intervals should
be adjusted for extremes of temperature or other
adverse operating conditions.
Table 2. Scheduled Inspections
Inspection Task
Inspection Interval
Weekly
Periodic
(1 month or 100 hours,
whichever comes first)
Safety
(annual or 1000 hours,
whichever comes first)
GENERAL
Inspect control linkage and shift lever for operation.
Therese should be no sticking, binding, or looseness.
OIL COOLER AND LINKS
Inspect cooler for signs of leakage, damage, or loose
mounting bolts.
Inspect all connection points for signs of leakage.
TRANSMISSION
Inspect for damage or signs of leakage around
housing and/or bolts.
Remove dipstick. Check oil for signs of water or other
contaminants. Check (smell) oil for signs of burnt oil
(overheating). If found, replace fluid.
See Maintenance.
WARNING
CAUTION
WARNING: Failure to perform these
inspections at required intervals can
result in injury to personnel.
X X
X X
X
X
X
X
X
CAUTION: Failure to perform these
inspections at required intervals can
result in transmission failure.
CAUTION
CAUTION: If oil is discolored or has
been overheated (above 190°F) it
must be replaced.
CAUTION
CAUTION: Check mounting bolts for
tightness. If loose, tighten to torque
specified in OEM manual.