YOKOGAWA CMZ 500 & 700 Gyrospare for Gyocompass
YOKOGAWA
Refurbished
The YOKOGAWA CMZ-700 and CMZ-900 gyrospheres are critical sensitive elements used inside Yokogawa/Yokogawa Denshikiki marine gyrocompass systems.
For SEO and purchasing purposes, an important distinction is:
CMZ-700 → KT005 / KT005E Gyrosphere
CMZ-900 → MKT007 / MKT007E Gyrosphere
Marine spare-parts references identify KT005 with CMZ-700 and MKT007 with CMZ-900. KT005E is also listed as an exchange gyrosphere for the CMZ-500/CMZ-700 family.
Manufacturer: YOKOGAWA / Yokogawa Denshikiki / Yokogawa Hokushin Electric
Equipment: Marine Gyrocompass
Product: Gyrosphere / Gyro Sphere / Sensitive Element
CMZ-700 Gyrosphere: KT005 / KT005E
CMZ-900 Gyrosphere: MKT007 / MKT007E
Application: True-heading generation for marine navigation systems
Country Associated with Equipment: Japan
The KT005 Gyrosphere is one of the principal replacement components for the YOKOGAWA CMZ-700 gyrocompass.
Available technical/spare-parts references specifically identify:
KT005 – Gyrosphere
KT005 – Gyro Sphere for CMZ-700
KT005E – Exchange Gyro Sphere for CMZ-500 / CMZ-700
The CMZ-700 spare-parts documentation also identifies supporting liquid, mercury and insulating fluid among service-related items for the gyro assembly.
The MKT007 is the gyrosphere / sensitive element associated with the YOKOGAWA CMZ-900 series.
CMZ-900 technical literature identifies the MKT007 Gyrosphere as being incorporated into the MKM026 Master Compass. The CMZ-900 family includes single and dual configurations such as CMZ-900B, CMZ-900S and CMZ-900D.
Marine spare-parts references additionally identify:
MKT007 – Gyrosphere
MKT007E – Exchange Gyrosphere
MKT007E – CMZ-900 / MKM026 / MKM029 application
The gyrosphere is the heart of a conventional marine gyrocompass.
Its rapidly rotating gyro element, together with the gyrocompass control and follow-up system, allows the equipment to establish and maintain a reference to true north.
This heading can then be distributed to other shipboard equipment such as:
• Radar / ARPA
• ECDIS
• Autopilot
• AIS
• VDR / S-VDR
• Steering System
• Heading Repeaters
• Course Recorder
• Other bridge navigation systems
A gyro-sphere problem can therefore affect much more than the gyrocompass display itself.
Commonly searched components associated with CMZ-700 include:
• KT005 Gyrosphere
• KT005E Exchange Gyrosphere
• Gyro Sphere Container
• Supporting Liquid
• Insulating Liquid / Insulator
• Mercury service material for applicable legacy systems
• O-Ring / Seal Kit
• Overhaul Kit
• Power Supply Assembly
• Inverter Assembly
• Control / Interface Boards
• Connection Box
• Repeater Compass Components
Technical spare-parts listings specifically associate supporting liquid V8114ML, mercury V8109PN and insulator V8109PT with CMZ-700 service parts.
Typical CMZ-900 requirements include:
• MKT007 Gyrosphere
• MKT007E Exchange Gyrosphere
• Gyro Sphere Container
• Supporting Liquid
• Overhaul Service Kit
• Master Compass Components
• Control Boards
• Interface Boards
• Connection Box Components
• Repeaters
• Cables & Connectors
The CMZ-900 technical documentation describes a titanium capsule/electrode arrangement and an anti-vibration system intended to provide stable operation in marine environments.
YOKOGAWA CMZ-700
Gyrosphere: KT005
Exchange Reference: KT005E
YOKOGAWA CMZ-900
Gyrosphere: MKT007
Exchange Reference: MKT007E
These references should not be treated as automatically interchangeable.
Always verify the gyrocompass model, master compass model, gyrosphere part number and vessel configuration before ordering.
Possible causes include deterioration of the sensitive element, supporting-liquid condition, electrical/control problems or other master-compass faults.
The gyrosphere, power supply, control electronics, supporting system and configuration should be inspected.
Check:
• Gyrosphere condition
• Speed/latitude correction
• Master compass
• Follow-up system
• Control electronics
• Vessel reference/alignment
Do not immediately assume that the gyrosphere has failed. Power supply, inverter, control boards, wiring and related master-compass components should also be diagnosed.
Service references commonly identify the gyrosphere as a periodic replacement/overhaul item. One industry maintenance reference gives approximately 20,000 running hours for CMZ-700 KT005 and CMZ-900 KT007/MKT007 sphere replacement planning. Actual maintenance should follow the applicable manufacturer documentation and vessel/class requirements.
A gyrosphere is a precision navigation component and should not be handled like an ordinary electronic spare.
CMZ-900 documentation specifically gives precautions for removal and states that servicing should be carried out by authorized/qualified personnel.
During replacement or overhaul:
• Follow the correct shutdown procedure
• Allow the required stopping/cooling period
• Keep the working area clean
• Avoid shock or impact
• Use correct service tools
• Use only the specified supporting/service fluids
• Check seals and O-rings
• Carry out heading checks after installation
• Verify connected repeaters and navigation equipment
YOKOGAWA CMZ gyrocompass systems are found aboard many commercial vessels, including:
• Bulk Carriers
• Container Ships
• Oil Tankers
• Chemical Tankers
• LNG / LPG Carriers
• General Cargo Ships
• Offshore Vessels
• Passenger Vessels
• Merchant Ships
The gyrocompass supplies heading information to several critical bridge systems.
An unreliable gyro can consequently produce incorrect or unstable heading information for:
Radar → ECDIS → Autopilot → AIS → VDR → Heading Repeaters
Replacing or overhauling the failed sensitive element can therefore restore the existing gyro installation without requiring replacement of the complete navigation system.
SM MARINE SERVICE™ can support sourcing for:
YOKOGAWA CMZ-500
YOKOGAWA CMZ-700
YOKOGAWA CMZ-700B / 700S / 700D
YOKOGAWA CMZ-900
YOKOGAWA CMZ-900B / 900S / 900D
Typical requirements include:
• Gyrosphere
• Gyro Sphere
• Sensitive Element
• KT005
• KT005E
• MKT007
• MKT007E
• Gyro Container
• Supporting Liquid
• Overhaul Kit
• Power Supply
• Inverter Assembly
• Control PCB
• Interface PCB
• Connection Box
• Repeater Compass
• Cables & Connectors
• Complete Gyrocompass
Available condition may include:
New • Used • Tested Working • Refurbished • Reconditioned • Exchange Basis
The commonly documented gyrosphere is KT005, while KT005E appears in spare-parts listings as an exchange version for CMZ-500/CMZ-700.
The CMZ-900 technical literature identifies MKT007 as its gyrosphere.
MKT007 is the main gyrosphere / sensitive element incorporated in the CMZ-900 master compass system.
Spare-parts references identify KT005E for exchange applications covering CMZ-500/CMZ-700. Exact compatibility should still be verified from the installed equipment before supply.
Yes. In marine service and spare-parts terminology, searches may use gyrosphere, gyro sphere, gyro element or sensitive element for this critical gyrocompass component.
Depending on the condition of the system, the gyrosphere can be serviced/replaced without replacing the entire gyrocompass. The complete system should still be inspected to determine whether other components caused the fault.
SM MARINE SERVICE™ can support worldwide sourcing of YOKOGAWA CMZ-series gyrospheres, gyrocompass units and associated spare parts subject to stock availability.
YOKOGAWA CMZ-700 KT005 / KT005E and CMZ-900 MKT007 / MKT007E gyrospheres are critical sensitive elements used in Yokogawa marine gyrocompass systems for accurate true-heading generation. SM MARINE SERVICE™ can support worldwide supply of gyrospheres, exchange spheres, supporting liquid, overhaul kits, gyro containers, PCBs and complete YOKOGAWA gyrocompass equipment in new, used, tested, refurbished and reconditioned condition.
Marine Automation & Navigation Equipment Supplier
Available Condition:
New • Used • Tested Working • Refurbished • Reconditioned • Exchange Basis
Services:
Worldwide Shipping • Gyro Spare Parts Supply • Marine Equipment Sourcing • Technical Support
Contact SM MARINE SERVICE™
Samir Market, DT Road, Pahartali, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
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