TM 55-1930-209-14&P-4
Section IV. Maintenance procedures
4-6 General. Maintenance for this system consists of lubricating, disassembling, and repairing or replacing components
using repair parts listed in TM 55-1930-209-14 & P-18. No special tools are required. When performing maintenance,
observe safety precautions in this manual, manufacturers' manuals/instructions, and these precautions:
a.
Always use new seals and gaskets before reassembling components disassembled for repair. Be sure to use
only new seals and gaskets identical to original. Install them carefully so as not to damage seals and gaskets
during assembly.
b.
When replacing O-rings, make sure all surfaces are clean and free of dirt, grit, or foreign material. Prior to
installation, apply a thin coat of silicone grease to O-ring for ease of assembly. Protect rings by applying
tape over threads, sharp corners, and edges.
c.
When replacing gaskets, make sure mating surfaces are clean and free of old gasket material, adhesive, oil,
or grease. These precautions will ensure a leakproof joint.
WARNING
Be sure electrical power is off before performing maintenance on this system. OPEN circuit breakers. Redtag
circuit breakers or motor controller with: "WARNING DO NOT ACTIVATE. REPAIRS BEING MADE." Observe
safety precautions listed In front of this volume and those specified in manufacturers' manuals/instructions.
d. Follow these procedures when soldering and crimping connections:
(1) Strip cable insulation equal to depth of terminal well.
(2)
Slide insulator, if used, over cable.
(3)
Insert cable into terminal well and crimp.
(4)
Slide insulator, if used, over crimped end of terminal.
Figure 4-1. Replacement of Crimped Terminals
Check all grounding. Make sure current carrying members are properly insulated to avoid short-circuiting.
Check for abrasions and chafing of insulation on wires and cables. Repair with tape or replace as necessary.
e.
Replace screws and nuts if threads are damaged. If threads on fittings are only slightly damaged, chase
threads with chasing tool. Replace cross-threaded fittings. Inspect tapped holes for damage. if threads are
damaged, tap hole for next oversize screw or stud. If retapping weakens part, replace part.
NOTE
Due to this vessel's mission and crew capabilities, maintenance normally assigned to unit
level or higher echelons of maintenance may be assigned to the crew.
4-4
