Seakeeper 7000 GYRO Technical Bulletin

Procedure: VALIDATING GYRO INSTALLATION WITHOUT FRONT BRACE

Description: Checking lateral alignment of cylinder rod ends

Application: Model 7000 gyro installed without using front brace to control foundation
alignment.
Other Items:
Required: millimeter ruler/ measuring device or instrument
Required: Doc # 90020, Rev 5, Model 7000 Gyro Installation Manual
Required: Dwg # 90002, Rev 3, Model 7000 Gyro Installation Details
Required: Dial indicator with base

Background

If the gyro has been installed without the use of the forward brace in place; the port and starboard
aluminum saddle beams may have moved relative to each other during handling (Fwd/Aft alignment) or
during gluing without the forward brace installed. This has the potential to misalign the gyro gimbal axis
which in turn will misalign the gimbal bearings and cause binding and premature wear of the brake
mechanism. In short, a misalignment during gluing could reduce the performance and life of the gyro.
Figure 1 below shows the misalignment that could occur if the saddle beams are not in proper alignment
with each other. If the cylinder rod is not perpendicular to the gimbal shaft, a bending load will be
induced on the cylinder rod which could lead to premature failure of the cylinders, rods or seals.
Figure 1 Potential Misalignment of cylinder rod end at gimbal shaft
Product:
TECHNICAL
BULLETIN
MODEL 7000 GYRO
Document #: Rev:
90073 2
Page:
1 of 4