TM10-3930-660-34 16-12.3.   OUTER BOOM - REPLACE/REPAIR (Cont’d) a. Start engine and raise outer boom (3) as necessary to access hoses (1 and 2).  Stop engine. WARNING Disconnect hoses carefully during step b.  Hydraulic oil may be under pressure.  Failure to follow this precaution will cause personal injury. b. Tag and disconnect three hoses (1) from lines (4) at bulkhead.  Plug three hoses (1) with metal caps. c. Remove capscrew (5), four clamp halves (6) and nut (7) securing two hoses (2).  Leave hoses (2) plugged with metal caps. 2. DISCONNECT ROD END OF BOTH BOOM HOIST CYLINDERS (8) FROM OUTER BOOM (4). a. Place suitable wood block across vehicle deck behind cab to support boom hoist cylinders (8) when cylinders are lowered. b. Start engine.  Lower outer boom until cylinder pivot pins (9) are just above cab.  Stop engine. c. Support outer boom (3) with hoist and slings positioned at front of boom (3). d. Remove capscrew (10) and locknut (11) securing pivot pin (9) to boom hoist cylinder (8).  Discard locknut (11). e. Support boom hoist cylinder (8).  Remove pivot pin (9) from outer boom (3) and boom hoist cylinder (8). 16-82