B&G RAM T0 User manual

ENGLISH
RAM T0
Marine Linear Actuator
User Manual
bandg.com
simrad-yachting.com

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The information in this manual was, to the best of our knowledge,
correct when it went to press and Simrad or B&G cannot be liable for
any inaccuracies or omissions. There may also be differences
between the specifications in the manual and the product as a result
of ongoing development for which we accept no liability.
This precision engineered product was designed and manufactured in
the United Kingdom.
Please keep this manual in a safe place

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CONTENTS
 Important Safety Information
 Compliance Statement
 Emergency Quick Release
 Emergency Steering
 Description
• Technical Data
 Location
 Dimensions
 Quadrant
 Considerations
 Coil Connections
 Tiller Bolt
 Mounting Foot
 Dismounting the unit from its base
 Hydraulic Fluid
Commissioning
 Maintenance
Servicing
 Fault Finding
 General Information
 Contact Details
Page 4
5
6
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10
11
12
13
14
15

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IMPORTANT SAFETY INFORMATION
Failure to install and maintain this equipment in accordance with the
instructions contained in this manual could result in damage or injury.
This equipment must be installed and maintained by a person who is
qualified to do so. This equipment is only for use with marine autopilots
within the limitations stated in the following pages. Autopilot steering
systems are navigational aids and the user must still maintain a perma-
nent watch.
This equipment meets the latest EMC (Electromagnetic Compatibility)
standards required for use in the marine environment. In order to ensure
conformance and to prevent interference with electronic systems the
unit must be properly bonded to earth and the supply cables screened.
Caution!
In operation, this unit can rotate the vessel’s wheel rapidly.
Keep clear of the wheel when this unit is engaged to avoid entrapment.
Beware of hot motor and solenoid components and the risk of
entrapment from moving parts.
Do not flash test.
COMPLIANCE STATEMENT
The RAM T0 complies with CE under directive 2014/30/EU. The rele-
vant Declaration of Conformity is available in the following websites un-
der model documentation section:
www.simrad-yachting.com or www.bandg.com
 Complies with the requirements of level 2 devices of the Radio
communications (Electromagnetic Compatibility) standard 2017.
Warning!
The user is cautioned that any changes or modifications not expressly
approved by the party responsible for compliance could void the user’s
authority to operate the equipment.

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EMERGENCY QUICK RELEASE
In the unlikely event of failure of the actuator a quick release R-Clip is fitted
to the tiller bolt which secures the actuator to the steering quadrant.
Pull the red tab to release the R-Clip and then manually lift the actuator
clear of the steering quadrant.
EMERGENCY STEERING - PRIMARY STEERING FAILURE
If the primary steering fails it may be possible to steer the boat via the
autopilot controls.

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TECHNICAL DATA
Voltage 12 VDC
Typical Amp-hour Typical Current
60 kg at 25% duty Intermittent 350 kg
Current 1.3 A 14.0 A
Hard-over time 12 seconds (Nominal)
Volume (average) 234cc
Ingress protection IP67
EMC Protection BS EN 60945:2002 (DC)
Ignition Protection BS EN 28846:1993
Declaration of
Conformity EMC Directive 2014/30/EU
Ambient op’ temp -15 to + 55 deg C
Max op’ thrust 350 kg (Intermittent)
Orientation Red lead to positive - Extends
Black lead to positive - Retracts
Clutch coil 12 watt
Clutch connection DIN 43650 (6-8 mm cable)
Fluid ISO VG10 to VG40 hydraulic
mineral fluid to ISO 6743-4 HV
Suitable commercial Fluids:
Fuchs Renolin B 15 HV1
Seastar HA5430
Weight 8 kg
DESCRIPTION
The RAM T0 Hydraulic linear actuator combines a cylinder, pump,
motor, clutch and reservoir in a pre-filled, sealed unit. Designed to be
used on vessels fitted with mechanical primary steering that can be
back driven. When the clutch is disengaged the cylinder is free and
moves with the primary steering. To operate the unit in autopilot mode
the course computer energises the clutch solenoid coil and runs the bi-
directional motor to extend and retract the ram. Internal relief valves
protect the unit and its mountings from rudder strikes, grounding etc.

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LOCATION
The RAM T0Actuator is designed for under-deck installations only.
When considering where to mount the actuator the following points
should be taken into account.
: Keep cable runs short.
: Mount away from sources of heat.
: Install the actuator above areas liable to flooding.
: Use a solid surface, capable of supporting the large thrusts generated
by this unit.
: Ensure that piston movement is limited by the rudder hard stops and not
by the actuator end stops.
: Allow sufficient clearance for removal of the mounting pin.
: Check that no part of the actuator fouls the vessel or rudder quadrant
throughout its full range of movement.
: It may be mounted in any orientation providing the limits stated are not
exceeded.

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DIMENSIONS

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QUADRANT
Typical installation for an 6.9”
(177 mm) radius with total
rudder angle of 70 degrees.
CONSIDERATIONS
Allow sufficient clearance for removal
of the mounting pin and rod end from
the tiller bolt.
COIL CONNECTIONS
PIN 1
POSITIVE PIN 2
NEGATIVE
NOT USED

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TILLER BOLT
The tiller bolt supplied is suitable for a
quadrant thickness of 12 to 16 mm.
The tiller bolt mounting hole should be
drilled Ø12.2 to 12.3 mm.
An application of Loctite 638 or
equivalent where shown is
recommended.
Tighten the M12 nut to 27 Nm Torque.
MOUNTING FOOT
The four M8 nuts, bolts and washers
supplied are suitable for mounting the
actuator ono a surface of between
12 mm and 24 mm thick
Tighten the four M8 nuts to 17 Nm

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DISMOUNTING THE UNIT FROM ITS BASE
The RAM T0 features a quick-dismount base.
To remove the base from the unit first take off the coil which is secured
by a 17 mm A/F nut. Next, undo and remove the Allen screw ‘A’ and
the retaining plate ‘B’ . Withdraw the mounting pin ‘C’ which will release
the base.
NOTE!
The pin is a close engineered fit and if it proves difficult to remove take
off the plastic cap from the head of the pin and insert screw ‘A’ into it.
It will then be possible to withdraw the pin using a pair of pliers or
grips.
IMPORTANT!
Avoid damage to the pin
Assembly is a reversal of the removal process. Ensure the plastic cap
is re-fitted to the pin upon completion.

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HYDRAULIC FLUID
Caution
Do not use Brake fluid
Use mineral based good quality hydraulic fluid compatible with nitrile
hydraulic seals.
Ref technical data on page 6
COMMISSIONING
Caution
Be aware of the danger of moving linkages and the risk of entrap-
ment.
The unit is pre-filled and sealed from new. Do not disassemble the
unit, this will allow air to enter and necessitate refilling and bleeding
the unit Ref. page 13.
Use the primary steering to check the full range of movement before
commissioning the Autopilot
Caution
Check the unit for damage and leaks after installation.

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MAINTENANCE
The RAM T0 is a sealed unit, quality precision engineering will ensure
many years of trouble free service if the following points are adhered to.
: Keep the piston rod free from damage.
: Avoid exposing the unit to salt water.
Perform the following checks regularly:
: Check the security of the mounting bolts and tiller pin.
: Examine electrical cables and connections for damage and corrosion.
: Lubricate the mounting pin and rod end with marine grade grease.
SERVICING
The motor is a non-serviceable item and should be replaced with a new
motor and drive coupling Kit.
Part No. R4510-sk 12 50 X
Please quote your units serial number when ordering (Ref. page 15).
In the unlikely event that new seals are required a kit is available:
Hydraulic Projects Ltd Part No. ML+40sk.
Caution
For filling and bleeding a special tool is required:
Hydraulic Projects Ltd Part no. R4051.
Failure to use this tool may result in damage to the actuator.

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FAULT FINDING
Under no circumstances dismantle the unit unless it is certain that
the fault is internal. Doing so will allow air into the cylinder,
requiring the unit to be bled for which special tools are needed.
Ref. page 13.
Caution
Any damage to the piston rod will damage its seals and allow air into the
cylinder and oil leaks.
1) Motor does not run
: check electrical connections.
: check course computer output.
2) Motor runs, but erratic or no piston movement
: check for solenoid operation.
: check for air in the cylinder and external leaks.
: check drive coupling.
3) Excessive noise
: check the motor for damage.
: check for air in the cylinder and external leaks.
: check drive coupling.
4) Failure of clutch to engage or disengage
: check solenoid operation.

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Keep this manual in a safe place. Quote the model and serial
numbers in all correspondence.
Model Number: ________________________________
Serial Number: ________________________________
Date of Purchase: ________________________________
Dealer: ________________________________
________________________________
________________________________
CONTACT DETAILS
For inquiries in general, contact Simrad or B&G:
www.simrad-yachting.com or www.bandg.com
For inquiries of spare parts, contact Hydraulic Projects Limited:
www.hypro.co.uk
GENERAL INFORMATION

988-12092-001