11
Section III: Maintenance
1.0 Maintenance
1.1 General
Maintenance is required on TDW closures. Most is
preventive maintenance and can be performed each
time the closure is opened.
1.2 O-Ring/O-Ring Surfaces
There are two O-rings on the D-2000, 16"–30"
closure. One is on the pressure warning lock screw,
and another is on the barrel collar, making a seal
when the door is closed. Always clean and coat
these with a thin film of grease each time the
closure is open. Inspect for cuts and scratches or
deterioration. Replace O-rings if there is any sign
of damage.
Figure 17. Lube O-Ring on Pressure
Warning Lock Screw
Figure 18. Additional Lube Points
1.3 Clamp Ring
Always clean the interior surfaces of the clamp
ring and apply a thin film of lubricant. At regular
intervals:
A. Lubricate all hinge points on clamp ring
assembly. The door hinge bearings are oil
impregnated, sintered bronze and do not
require lubrication but should be checked at
regular intervals for excessive wear.
B. Keep all exterior surfaces painted to prevent
rust.
1.4 Pressure Warning Lock
A. Make sure threads are clean and free of nicks.
B. Inspect the O-ring and bushing.
To Next Page