DATASONICS SIS-1500, System Manual

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SIS-1500 Seafloor Imaging System 5-7
SECTION 5 Maintenance and Troubleshooting Tow Vehicle Periodic Maintenance
Electronics Housing Reassembly
To reassemble the electronics housing:
1. Inspect the O-rings on the nose and the end cap. They should be free of
any scratches, nicks or dirt. In addition, inspect the O-ring surfaces on
the electronics housing. They should also be free of any scratches, nicks
or dirt.
If necessary, wipe the O-rings clean with an alcohol wipe and apply a light
coat of silicone lubricant. Replace any O-ring that appears cracked or
nicked.
When replacing an O-ring, first clean the O-ring surface on the housing
with a clean, lint-free cloth or paper towel, and then apply a thin coat of
silicone lubricant to the new O-ring before installing it onto the nose or end
cap.
2. Slide the electronics housing over the electronics chassis and align the
slot on the housing with the tab in the end cap.
3. Press the housing onto the end cap until the tab in the end cap is fully
inserted into the slot in the housing.
4. Connect the in-line connector, if included, to the connector on the nose.
5. Align the guide pin on the nose with the hole in the electronics chassis
and insert the nose into the electronics housing, pressing it into the
housing until the rim of the housing is just past the first O-ring.
6. While pressing the nose against the housing, turn the closure bolt in the
nose clockwise until the nose is fully seated against the housing. Do not
overtighten.
7. Attach the safety cable shackle to the towing arm.
Sonar Transducer Housing Disassembly
To disassemble the sonar transducer housing and access the sonar
transducers:
1. Prepare a clean, dry work area.
2. Disconnect the safety cable from the towing arm and the tail assembly by
removing the shackles, and then remove the cable entirely.
3. Remove the four down-look angle adjusting screws. Refer to Figure 3-6
on page 3-16 for the location of the screws.