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 55 of 100
f. Post
Maintenance
Reassembly
1 Apply
Permatex
TM
anti-seize (GRE003) thread lubricant to the end threads of the eight ½-13 x 1½
inch long hex head bolts (BLT015) and the two 5/16 x 1½ long security screw (SCR154) used to
attach the locking mechanism (rear plate) and outlet port (front plate) to the projector.
2 Insert and rotate the locking mechanism 90° in either direction to align the mounting holes to the
projector port. NOTE: the SENTINEL SENTRY 330 requires a spacer plate behind the rear plate
while the SENTINEL SENTRY 110 does not.
3 Secure the locking mechanism assembly to the projector by installing the four ½-13 x 1½ in bolts
using a calibrated torque wrench. Torque the bolts in an opposing cross pattern to 70 foot /lbs
(94.90 Nm), ± 6 foot/lb (8.13 Nm). Install the security screw and torque to 110 in/lbs (12.43 Nm),
± 5 in/lb (0.57 Nm).
4 Align and attach the outlet port assembly to the projector by installing the four ½-13 x 1½ in bolts
using a calibrated torque wrench. Torque the bolts in an opposing cross pattern to 70 foot/lbs
(94.90 Nm), ± 6 in/lb (8.13 Nm). Install the security screw and torque to 110 in/lbs (12.43 Nm), ±
5 in/lb (0.57 Nm).
g. Lock and Dust Cover Assembly
1
Remove the dust cover assembly (86025) from the gamma-ray source projector by removing the
socket button-head cap screw (SCR311).
2
Inspect the dust cover (86025-1) for damage. Remove the lock cover assembly (86023) from the
dust cover by removing the three socket cap screws with washers (SCR332) Verify the notched
cover pins (86023-1) are not bent, excessively worn or have rotated from their fixed position.
Replace the coiled spring pins (PIN059) that retain the notched cover pins if they are rusted,
broken or cracked.
3 Remove the plunger lock assembly from the lock cover assembly by removal of the socket head
cap screw (SCR023). Thoroughly clean the plunger lock and its extension in clean solvent. Clean
the bore of the lock cover using clean solvent. Use compressed air to thoroughly dry the plunger
lock internally. Inspect the plunger lock for excessive wear on the outer bore and excessive
looseness of the key tumbler. Replace the entire plunger lock and extension if the key tumbler is
loose or if the plunger lock is loose when inserted into the lock cover.
4 Clean and inspect the lock cover for damage. Confirm the notched cover pins do not have wear in
the notched area and are not loose.
5 Lubricate the key tumbler of the lock with a few drops of light oil, such as 3-in-1™ oil. Insert and
remove key several times and actuate tumblers to work the light oil into the tumblers. Apply a light
coating of lubrication to plunger lock barrel and inside surfaces of the lock cover assembly using
MIL-G-23827B (or C), MIL-PRF-23827C, (or equivalent radiation resistant grease authorized by
QSA Global, Inc). Insert the plunger lock (98929-3) into the lock cover and align the screw hole
for assembly. Apply thread locker (GLU018) to the socket head cap screw (SCR023), install and
tighten.
6 Clean and inspect the dust cover assembly. Replace any components that are worn or damaged.
Install the lock cover assembly in the dust cover assembly. Secure the lock cover assembly to the
dust cover by installing and tightening the three socket head cap screws and washers (SCR332).
