QSA Global, Inc.
40 North Avenue Burlington, MA 01803
888.272.2242
781.272.2000
qsa-global.com
Operations Manual
MAN-038 March 2019
Page 47 of 100
10 Remove the plastic seal, spring loaded sleeve and spring using a 3/8 inch Allen wrench.
11 Place the disassembled (non-plastic) locking mechanism components into a pan filled with fresh,
clean solvent. Clean all metal parts using a brush to dislodge any dirt or grease. Remove cleaned
parts from the solvent bath, dry and place on a clean surface. Inspect all parts for wear. Replace
worn parts as necessary.
12 Discard and replace the plastic tube seal. Discard all used locking mechanism springs and
replace with new springs. All compression springs located within the selector ring mechanism
must be replaced at 12-month intervals to ensure smooth and consistent operation of the
mechanism.
13 When ordering spare parts, indicate the model and serial number of the gamma-ray source
projector as well as the part number to ensure correct replacement.
14 Apply a light coating of lubrication to the inside surfaces of the selector ring retainer and selector
ring using MIL-G-23827B (or C), MIL-PRF-23827C, (or equivalent radiation resistant grease
authorized by QSA Global, Inc.). Do not lubricate the lock slide and sleeve. Note that some types
of greases may undergo chemical changes and form tars when exposed to radiation.
15 Lightly coat all other components with MIL-G-23827B (or C), MIL-PRF-23827C, (or equivalent
radiation resistant grease authorized by QSA Global, Inc.). Treat all screw thread ends with
Vibratite™ or Loctite™ 242 thread lock.