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Procedure: ANNUAL INSPECTION INSTRUCTIONS
1.
Purpose
This service bulletin identifies the specific areas to check for the recommended annual inspection of
the Seakeeper gyro stabilizers. Seakeeper has produced 5 different model gyros: Model 7000, 7000A,
8000, 21000 and 21000A.
2.
Identify Gyro
Every gyro has a product label with the model and serial number. Locate the product label and record
the model number and serial number. The location of the product label on different gyro models is
shown below.
Model 7000 & 7000A
For Model 7000 / 7000A, see Section 3.1, Page 2
For Model 8000, see Section 3.2, Page 7
For Model 21000 / 21000A, see Section 3.3, Page 11
Product:
SERVICE
MODEL 7000, 7000A, 8000, 21000,
BULLETIN
21000A GYROS
Document #:
Serial Number required
for all correspondence
with Seakeeper
Model 21000 & 21000A
Model 8000
Rev:
Page:
90133
1
1 of 16

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Summary of Contents for Seakeeper 7000

  • Page 1 Procedure: ANNUAL INSPECTION INSTRUCTIONS Purpose This service bulletin identifies the specific areas to check for the recommended annual inspection of the Seakeeper gyro stabilizers. Seakeeper has produced 5 different model gyros: Model 7000, 7000A, 8000, 21000 and 21000A. Identify Gyro...
  • Page 2: Coolant Circulation

    COOLANT CIRCULATION PUMP HEAT EXCHANGER Model 7000 / 7000 A COOLING COMPONENTS  Inspect heat exchanger and fittings for any leaks or severe corrosion. The heat exchanger is located below the aft transverse brace of the gyro frame as shown in above photo. Insure seawater cooling hoses are isolated from incoming seawater (i.e: close sea-cock) and disconnect seawater...
  • Page 3 If zinc anode is gone, make point to inspect every 2 months until erosion rate is determined. The anode is a 3/8 inch diameter x ¾ inch long pencil in a ¼” NPT plug. Contact Seakeeper Service Dept. to obtain the replacement anodes. Apply Teflon paste pipe thread sealant or Teflon pipe thread tape to the plug threads when re-installing.
  • Page 4 If a cylinder seal is showing signs of a significant leak, replace suspect cylinder – contact Seakeeper service for part identification and replacement procedure. Leaks will eventually result in a “Low Brake Pressure”...
  • Page 5 Inspect all electrical connectors on the gyro control box and motor drive box for damage or corrosion. Removing the connector is not necessary – just confirm no external connector damage or corrosion. If corrosion is present , follow Seakeeper Service Bulletin #90084 for cleaning and protecting connectors.
  • Page 6 Inspect ground and / or bond cable connections for corrosion and clean , re-install if required. Ground cable connection locations are shown below. Ground Connections  Check gimbal angle sensor calibration. See Seakeeper Service Bulletin 90083 for procedures to perform this task. 3.1.4 Gyro Enclosure / Foundation – ...
  • Page 7 Procedure: ANNUAL INSPECTION INSTRUCTIONS Document #: Rev: Page: SERVICE BULLETIN 90133 7 of 16 3.2 Model 8000 : 3.2.1 Cooling System -  Remove coolant fill cap and confirm coolant level is approximately as shown in the below photo. Correct Coolant Level Model 8000 Coolant Level ...
  • Page 8 2 months until erosion rate is determined. The anode is a 3/8 inch diameter x ¾ inch long pencil in a ¼” NPT plug. Contact Seakeeper Service Dept. to obtain the replacement anodes. Apply Teflon paste pipe thread sealant or Teflon pipe thread tape to the plug threads when re-installing.
  • Page 9 The expected life of the brake linkage bushings is 2000 hrs of SEA time . The bushings may need replacing sooner if operated in heavy sea conditions more often where the loading is more severe. Contact Seakeeper service for parts and replacement procedures.
  • Page 10 Inspect all electrical connectors on the gyro control box and motor drive box for damage or corrosion. Removing the connector is not necessary – just confirm no external connector damage or corrosion. If corrosion is present , follow Seakeeper Service Bulletin #90084 for cleaning and protecting connectors.
  • Page 11: Surge Tank

    Procedure: ANNUAL INSPECTION INSTRUCTIONS Document #: Rev: Page: SERVICE BULLETIN 90133 11 of 16 3.3 Model 21000 / 21000A : 3.3.1 Cooling System -  Remove coolant fill cap and confirm coolant level is approximately as shown in the below photo. COOLANT FILL LEVEL SURGE TANK HEAT EXCHANGER...
  • Page 12 The anode is a 3/8 inch diameter x ¾ inch long pencil in a ¼” NPT plug. Contact Seakeeper Service Dept. to obtain the replacement anodes. Apply Teflon paste pipe thread sealant or Teflon pipe thread tape to the plug threads when re-installing.
  • Page 13 The expected life of the brake linkage bushings is 2000 hrs of SEA time . The bushings may need replacing sooner if operated in heavy sea conditions more often where the loading is more severe. Contact Seakeeper service for parts and replacement procedures.
  • Page 14 Inspect all electrical connectors on the gyro control box and motor drive box for damage or corrosion. Removing the connector is not necessary – just confirm no external connector damage or corrosion. If corrosion is present , follow Seakeeper Service Bulletin 90084 for cleaning and protecting connectors.
  • Page 15 Procedure: ANNUAL INSPECTION INSTRUCTIONS Document #: Rev: Page: SERVICE BULLETIN 90133 15 of 16 3.2.4 Gyro Enclosure / Foundation –  Inspect enclosure, foundation frame, and hardware for corrosion and areas where paint should be reapplied. Any loose paint should be removed and cleaned back to bare metal and appropriate primer and top-coat paint system applied to seal the bare metal.
  • Page 16: Revision History

    Document #: Rev: Page: SERVICE BULLETIN 90133 16 of 16 REVISION HISTORY REVISION DESCRIPTION OF CHANGES DATE APPROVED INITIAL RELEASE 18MAY11 SEAKEEPER, INC. P.O. BOX 809, 44731 ST. ANDREWS CHURCH ROAD, CALIFORNIA, MARYLAND, 20619, U.S.A PHONE: 410-326-1590 FAX: 410-326-1199 E-MAIL: customerservice@seakeeper.com...

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