a. Tubestand Preventive Maintenance Checks and Services. The tubestand
requires some basic, periodic maintenance which should be performed every 90 days.
(1) Perform a general inspection throughout the assembly noting any worn
or damaged parts. Make any necessary repairs or replacements. Check the hardware
of the assembly (nuts and bolts) to ensure they are adequately tightened.
(2) Wipe down the exterior of the tubestand with a mild soapy solution and
clean, dry cloths to rid it of dust and foreign materials. Pay particular attention to the
steel transport rails.
(3) Apply power to the tubestand and operate each function at least once.
Check all travel features to ensure there is smooth travel and to determine each electric
lock is operating properly. Check the mechanical locks manually.
(4) Every six months, in addition to the 90-day maintenance, repack all
pulleys with Lubriplate. All steel cables should be checked for fraying and wear and
replaced, if necessary.
b. Electrical Lock Failure. The tubestand is basic in its electrical design. If
power is applied and none of the electrically-controlled locks function, you can assume
the problem is located at the power source. Check to make sure all connections from
the power supply are proper. If so, refer to the manufacturer's literature concerning the
appropriate power supply. If there is a malfunction by only one of the electrically
controlled locks, check that lock to ensure it is positioned properly. The locks are all
adjustable to increase or decrease drag. If the lock continues to malfunction after
adjustments are made and after the connections are determined to be adequate, the
lock itself should be replaced.
This paragraph contains information on preventive maintenance of the EXT-950
spot-film device (SFD) manufactured by Eureka X-ray Tube Inc.
a. EXT-950 (DPSC) Spot-film Device Preventive Maintenance Checks and
Services . The spot-film device (SFD) is a reliable, relatively simple mechanical device
rarely requiring corrective maintenance. Although component failures are rare, ease of
access for maintenance was an important consideration in its design. This keeps "down
time" to a minimum, since most components can be rapidly replaced. Following are
instructions, keyed to detail drawings, for adjustment of most of the components and
assemblies. Most of these straightforward procedures require a minimum of disassembly
and can be performed with a basic complement of common hand tools.