Raymarine REVERSING HYDRAULIC PUMP 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 Pump
Installation Guide
Drives covered:
M81120 Type 1 Hydraulic Pump 12 V
M81119 Type 1 Hydraulic Pump 24 V
M81121 Type 2 Hydraulic Pump 12 V
M81123 Type 2 Hydraulic Pump 24 V
M81122 Type 3 Hydraulic Pump 12 V
M81124 Type 3 Hydraulic Pump 24 V
Document number: 81178-3
March 2001
2 Hydraulic Pump - 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 watch 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 Pump - Installation Guide 3
Introduction
Product description
W elcome to the installation guide for the Raymarine hydraulic pump
(also known as the Raymarine reversing hydraulic pump).
This product is intended to operate the boat’ s steering mechanism as
part of a Raymarine autopilot system. It is primarily designed for use
on boats with an existing hydraulic steering system. Alternatively,
you can use this pump on a boat with mechanical steering in
conjunction with a secondary steering ram.
The hydraulic pump contains a precision gear pump and a check
valve driven by a servo motor .
Ram ports
Figure 1: Main parts of a typical hydraulic pump
Contents
This guide contains:
Reservoir port
Gear pump
Product specifications page 4
1
Installation instructions page 5
2
Maintenance information page 17
3
Motor
Check valve
Mounting foot
D5175-1
4 Hydraulic Pump - Installation Guide
Specifications
Pump specifications
Table 1: Pump specifications
Performance
(at nominal voltage)
Type 1 (T1)
M81120 (12 V)
M81119 (24 V)
Type 2 (T2)
M81121 (12 V)
M81123 (24 V)
Ram compatibility single or double ended
Ram capacity
(min-max)
Maximum stall
pressure (at 12 V)
Peak flow rate
(no load)
80-230 cc
(4.9-14 in
3
50 bar
(750 psi)
1000 cc/min
3
/min)
(67 in
)
230-350 cc
(14-21 in3)
100 bar
(1450 psi)
2000 cc/min
(122 in3/min)
Other information (applies to Types 1, 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
Pump dimensions
All ports are 1/4 inch BSP (parallel threaded)
Type 3 (T3)
M81122 (12 V)
M81124 (24 V)
350-500 cc
(21-30.5 in3)
80 bar
(1160 psi)
2900 cc/min
(175 in3/min)
two holes to accept 6 mm (0.25 in) bolts
175 mm (6.9 in)
Type 1 (12 V) and Type 2 pumps
105 mm (4.13 in)
Figure 2: Type 1 (12 V) and Type 2 pump dimensions
90 mm (3.54 in)
D5174-1
Hydraulic Pump - Installation Guide 5
All ports are 1/4 inch BSP (parallel threaded)
103 mm (4.07 in)
holes to accept 6 mm (0.25 in) bolts
235 mm (9.25 in)
Type 3 pump
Figure 3: Type 3 pump dimensions
Installation instructions
Parts required
T o install this drive you will need:
• Parts supplied:
• hydraulic pump
• if required:
• Additional parts:
• suitable hydraulic pipes, hydraulic fluid, T -pieces, pipe
fittings and thread-sealing compound (see page8)
• suitable securing bolts and lock washers/lock nuts (see
page 8)
• suitable cable and electrical connectors for the drive motor
and clutch (see page 13)
Note: Make sure you have obtained these additional parts before you
start installation.
1
/
in BSP to
4
117 mm (4.62 in)
1
/
in NPT adaptors (x3)
4
D5173-1
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