Cab and Body Maintenance Instructions (Cont)
Adjustment feature is sensitive so that one turn of stem (4) may increase set
pressure significantly. Adjust stem (4) 1/4 turn at a time until desired setting is
Stem (4) must fully engage threads of nut (3). Ensure that top of stem (4) is flush
with or slightly protruding from top of nut (3) when nut (3) is tightened.
Amount of adjustment in counterclockwise direction is limited by a shoulder stop on
To increase set pressure, turn stem (4) clockwise.
To decrease set pressure, turn stem (4) counterclockwise.
Once desired setting is obtained, insert hex key into stem (4) to hold stationary while tightening
nut (3) with wrench.
Insert plastic plug (2) and close latch (1).
With closure assembly (5) firmly closed, check clearance between latch (1) and closure assembly
(5). If latch (1) just touches closure assembly (5), adjustment is correct. If adjustment is not
correct, adjust manhole cover per Para 16-49.2.
b. Follow-on Maintenance. None.
END OF TASK