Raymarine HYDRAULIC LINEAR User Manual

Distributed by

Any reference to Raytheon or

RTN in this manual should be

interpreted as Raymarine.

The names Raytheon and RTN

are owned by the

Raytheon Company.

Hydraulic Linear
Drive

Installation Guide

Drives covered:

M81200 Type 2 Hydraulic Linear Drive 12 V
M81201 Type 2 Hydraulic Linear Drive 24 V
M81202 Type 3 Hydraulic Linear Drive 12 V
M81203 Type 3 Hydraulic Linear Drive 24 V

Document number: 81177-3
March 2001

2 Hydraulic Linear Drive - Installation Guide

Important information

Safety notices

WARNING: Product installation

This equipment must be installed and operated in accordance
with the instructions contained in this handbook. Failure to do so
could result in poor pr oduct performance, personal injury and/
or damage to your boat.

Because correct performance of the boat’s steering is critical for
safety , we STRONGLY RECOMME ND that an Authori zed
Raymarine Service Representative fits this product.

WARNING: Navigation aid

Although we have designed this pr oduct to be accurate and
reliable, many factors can affect its performance. As a result, it
should only be used as an aid to n avigation and should never
replace commons ense and navigational judgement. A lways
maintain a permanent wat ch so you can respond t o situations as
they develop.

EMC conformance

All Raymarine equipment and accessories are designed to the best
industry standards for use in the recreational marine environment.
The design and manufacture of Raymarine equipment and
accessories conform to the appropriate Electromagnetic
Compatibility (EMC) standards, but correct installation is required to
ensure that performance is not compromised.

Handbook information

T o the best of our knowledge, the information in this han dbook was
correct when it went to press. However, Raymarine cannot accept
liability for any inaccuracies or omissions it may contain. In addition,
our policy of continuous product improvement may change
specifications without notice. As a result, Raymarine cannot accept
liability for any differences between the product and the hand book.

© Raymarine Ltd 2001.

Hydraulic Linear Drive - Installation Guide 3

Introduction

W elcome to the installation guide for the Raymarine hydraulic linear
drive system. This product is intended to operate the boat’ s steeri ng
mechanism as part of a Raymarine autopilot system.

The hydraulic linear drive system is designed for boats with existing
mechanical steering systems, not hydraulic steering s ystems. It
provides a totally isolated auto pilot steering system consisti ng of:

• Hydraulic ram: a self-contained autopilot steering cylinder with a
load limiting system and a built in clutch (to allow friction-free
steering when the autopilot is not in use).

• Reversing hydraulic pump: powers the hydraul ic ram.

• Hydraulic fluid reservoir: supplies hydraul ic fluid to the system.

CAUTION:

The ram drives the rudder directly from the tiller arm or rudder

quadrant. Before installing this drive unit, check that the boat’s
steering system can be backdriven from the rudder.

Reservoir

Reservoir clip

Tie-wrap

Tap

Reservoir pipe

Ram pipe

Pump pipes

Pump

Motor cables

Figure 1: Main components of the hydraulic linear drive system

Contents

Mounting foot

Clutch cable

Product specifications page 4

1

Installation instructions page 5

2

Maintenance information page 15

3

Ram

Push rod

Rod end

D5088-1

4 Hydraulic Linear Drive - Installation Guide

Specifications

Ram specifications

Table 1: Ram specifications

Performance

(at nominal voltage)

Maximum boat
displacement

Type 2 (T2)

M81200 (12 V)
M81201 (24 V)

22,000 kg
(48,500 lb)

Peak thrust 585 kg

(1,290 lb)

Maximum stroke 254 mm

(10 in)

Hardover to hardover time

10 sec 12 sec

Type 3 (T2)

M81202 (12 V)
M81203 (24 V)

35,000 kg
(77,000 lb)

1,000 kg
(2,200 lb)

300 mm
(12 in)

(+/- 35º, no load)

Maximum rudder torque 1,270 Nm

(11,300 lb.in)

2,565 Nm
(23,100 lb.in)

Other information (applies to Types 2 and 3)

protected for use in engine compartments

CE approvals - conforms to:
89/336/EC (EMC), EN60945:1997
94/25/EC (RCD), EN28846:1993

Ram dimensions

A (mid stroke)

457 mm (18 in)

80 mm

(3.15 in)

152 mm (6 in)

101.6 mm (4 in)

4 fixing holes for
8 mm (0.3125 in) bolts

Figure 2: Ram dimensions

Drive A (mid stroke)
Type 2 540 mm (21.25 in)
Type 3 690 mm (27.15 in)

D5093-1

Hydraulic Linear Drive - Installation Guide 5

Installation instructions

Parts required

T o install this drive you will need:

• Parts supplied:

• pre-filled and pre-bled system consi sting of: hydraulic ram;

hydraulic pump; hydraulic pipes; fluid reservoir (sup plied
fitted with transit cap; standard cap also supplied)

• hydraulic fluid (to fill reservoir)

• tiller pin assembly (see Figure 7) consisting of: tiller pin,

R-clip, top washer , lock washer, nut (UNC nyl ock)

• Additional parts:

• suitable securing bolts and lock washers/lock nuts for the

hydraulic ram and pump (see page 9)

• suitable cable and electrical connectors for the drive motor

and clutch (see page 12)

Note: Make sure you have obtained these additional parts before you
start installation.

Installation steps

WARNING: Electrical safety

Make sur e you have switched off the power su pply befor e you
start installing this product.

Follow these steps to install your hydrauli c linear drive system:

Consult the EMC installation guidelines. page 6

1

Mount the drive system components. page 7

2

Connect to the course computer. page 12

3

Complete the post-installation check. page 14

4

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