(2) Trailing Arm Assembly

TM 1-1520-238-T-4 3–6 3–2. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont) 3–2 (1) Shock Strut Assembly. The shock strut assembly is a steel cylinder that is fitted with an upper and lower piston assembly with pivot points which attach to the tailboom mount at one end and the trailing arm mount on the other end. A hydraulic service valve is provided at the center of the upper piston of the cylinder. A nitrogen charge valve is provided for servicing of the upper piston. (2) Trailing Arm Assembly. The trailing arm assembly provides support for the TLG and provides mounting for the TLG components. Two trailing arm attachments are provided for mounting of the trailing arm assembly. The aft end of the trailing arm forms an integral housing and socket which provides mounting for the fork assembly. A jack pad is mounted on the lower surface of the trailing arm housing forward of the tail wheel. M58-098A UPPER PISTON ASSEMBLY CYLINDER SHOCK STRUT PIVOT POINT MOUNT HYDRAULIC SERVICE VALVE SHOCK STRUT ASSEMBLY LOWER PISTON ASSEMBLY NITROGEN CHARGE VALVE TAIL BOOM MOUNT JACK PAD SHOCK STRUT PIVOT POINT MOUNT TRAILING ARM ASSEMBLIES TRAILING ARM MOUNTS TAIL BOOM SECTION WHEEL AND TIRE ASSEMBLY FORK ASSEMBLY AXLE ASSEMBLY Figure 3–6. TLG Assembly (3) Fork and Axle Assembly. The fork and axle assembly (fig. 3–7) consists of a fork and axle which is mounted by inserting the lower cam of the fork in the trailing arm socket. The center pivot shaft of the fork is hollow and provides mounting for the wheel centering mechanism. A wear plate is mounted on the fork assembly and is drilled with a single locking hole for the actuator lock pin to contact until fork centering is accomplished. A dust seal is installed between the trailing arm housing and the fork assembly to prevent foreign object damage (FOD) from the centering and locking the mechanisms. A static ground cable is attached to the bottom on the left hand side of the fork. The axle is attached to the open ends of the fork assembly and has bushings installed in both ends. A hole is drilled through each end of the axle which provides a way to secure the axle to the fork assembly. The hollow end of the axle is used to attach a steering bar during ground handling or a tow bar for towing from the rear of the helicopter.