TM10-3930-660-34 16-16.   BOOM EXTEND CYLINDER - REPLACE/REPAIR (Cont’d) g. Apply Loctite #271 on threads of rod (42) and nut (48).  Install nut (48) on rod (42). h. Place rod (42) and piston (49) assembly on suitable supports to prevent damage during assembly. i. Install two wear rings (46) and one new seal (47) on piston (49).  Position wear rings so that gaps are 180 degrees apart. CAUTION Use care when installing rod (42) and piston (49) assembly.  Keep rod (42) in line with barrel (44) to prevent binding.  Failure to follow this precaution will cause part damage. j. Lubricate barrel (44) inner diameter, piston (49) outside diameter and gland (43) outside diameter with clean hydraulic oil. k. Position rod (42) and piston (49) assembly in barrel (44). NOTE Tighten gland (43) so that it is flush with end of barrel (44). Do not overtighten gland (43). l. Tighten gland (43) on barrel (44). m. Install needle valve (41). 2. INSTALL COUNTERBALANCE VALVES (27 AND 28). a. Install three new O-rings (38-40) and three backup rings (35-37) on counterbalance valve (28). b. Install backup rings (29 and 30), two backup rings (31) and three new O-rings (32, 33 and 34) on counterbalance valve (27). 16-104