REPAIR OR REPLACEMENT
Check for cracks or loss of illumination (M137 only).
If no cracks are observed and light sources are illuminated, proceed with maintenance actions (M137
If cracks are observed but light sources are still illuminated, remove body assembly and notify local
Radiation Safety Officer (RSO). Perform wipe test under RSO supervision. Seal body assembly in a
double plastic bag (item 5, WP 0152 00), secure with tape (item 20, WP 0152 00), and await wipe test
results. If contaminated, dispose of assembly per RSO instructions. If assembly is not contaminated,
replace parts as authorized (M137 only).
If no illumination is observed, check for illumination in a dark room. Notify RSO of results and follow
procedure in step 3 above (M137 only).
Repair is by replacement of authorized parts that do not meet inspection criteria. Refer to WP 0137 00
and WP 0138 00.
When maintaining radioactively illuminated fire control equipment, follow radiation
hazard procedures in warning summary (M137 only).
Apply a light coat of grease (item 15, WP 0152 00) to new O-ring (1) (item 15, WP 0137 00). Install in
worm gear housing body (2).
If removed, install two new headless straight pins (3) in worm gear housing body (2).
Apply a light coat of grease (item 15, WP 0152 00) to new seal (4) (item 7, WP 0137 00). Install seal in
worm gear (5).
Grease (item 16, WP 0152 00) should be applied to worm gear and bearing surfaces
of worm gear and worm gear housing body.
Install worm gear (5) in worm gear housing body (2).
If removed, install headless straight pin (6) in worm gear (5).
seal (8) (item 6, WP 0137 00) and install in packing retainer (9).