TM 5-4310-387-14
6-13. Third Stage Crosshead and Rod Assembly (Cont).
(5)
Remove second stage piston assembly (para. 6-11).
(6)
Remove six screws (11), washers (12), housing (13), and preformed packing (14). Discard preformed
packing (14).
(7)
Remove crankshaft (15) and bearing (16).
(8)
Remove nut (17), washer (18), bolt (19), and balance weight (20).
(9)
Note position of connecting rods (21), (22), and (23) and remove them from crankshaft (15).
(10)
Install new connecting rod (21) and two connecting rods (22) and (23) on crankshaft (15) in the same
orientation as noted during removal.
(11)
Install balance weight (20), bolt (19), washer (18), and nut (17).
(12)
Install bearing (16) and crankshaft (15).
(13)
Install housing (13) and new preformed packing (14) and secure with six screws (11) andwashers (12).
(14)
Install crosshead (10), wrist pin (9), and two new retaining rings (8).
(15)
Install second stage piston assembly (para. 6-11).
(16)
Install first stage piston assembly (para. 6-9).
(17)
Install oil pump cam (7) and secure with plate (6) and two screws (5).
(18)
Install new gasket (4) and plate (3) and secure with four screws (1) and washers (2).
FOLLOW-ON MAINTENANCE
(1) Install first stage cylinder (para. 6-8).
(2) Install second stage cylinder (para. 6-10).
(3) Install fanwheel (para. 5-36).
b.
Repair. (figure 6-9)
(1)
Remove third stage crosshead and connecting rod assembly (para. a.).
WARNING
Cleanliness is imperative in maintaining and handling diving air system components. All tools
and parts must be kept free of oil, grease, rust, or other contamination in accordance with
Chapter 4, Section VI of this manual. Foreign substances within an assembly could result in
equipment failure and possible injury or death to personnel. Ensure that all air lines and
components removed or openings into the air system that provides breathing air are covered
with a plastic bag and secured with a rubber band or taped shut. Small components should be
stored in a plastic bag and sealed. Failure to do so will cause air system to become
contaminated and could result in injury or death to the diver.
6-30
