TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 18–36 Change 2 18–7 M42 TANK PERISCOPE — CONTINUED b. Disassembly NOTE There are currently two production models of the M42 tank periscope in use. Early models do not use removable charging port parts. 1 Remove two straight pins (3). 2 Remove air valve cap (5), valve core (6), purging valve stem (7) and strap (8). 3 Remove three machine screws (9), three lockwashers (10), retaining ring (11), and seal (12). Discard lock- washers. c. Assembly 1 Install seal (12), retaining ring (11), three new lockwashers (10), and three machine screws (9). 2 Apply sealing compound to purging valve stem (7) threads. 3 Install strap (8), purging valve stem (7), valve core (6) and air valve cap (5). 4 Install two straight pins (3). NOTE Nitrogen charge was released when valve core and machine screw were removed. 5 Purge and charge (TM 750–116). d. Installation 1 Install M42 tank periscope (4) by inserting straight pins (3) in holes. 2 Install five new lockwashers (2) and five cap screws (1).