TM 55-4920-328-13 e.  Lower the boom by slowly turning the release valve handle counterclockwise. f.  Raise or lower the load only by using the   chain block (9, figure 1-3). g.  Operate the hand brake (8, figure 1-5) to control rotation of the mast assembly (4). Section III.  T53 TURBOSHAFT ENGINE 2-14.  Installation and Preparation of T53 Turboshaft Engines for Testing. CAUTION Ensure that all hoses, engine ports, and cable connectors are capped at all times to prevent contamination. NOTE Refer to chapter 6 for standard tightening torque values. NOTE Install lockwire in accordance with MS33540. a.   Install the starter on the engine and the engine on the test dolly as follows: (1) Install three engine mounting brackets (13, figure 2-10) on the test dolly mount ring. (2) Install engine lifting eye bolts and sling (not part of kit), and suspend engine at a suitable working height. (3) Install three engine mount assemblies (8, figure 2-10), one on each engine mounting pad.  Tighten and lockwire the bolts. (4) Install two each shock absorbers (4) on each engine mount.  Insert one coupling (14) in each engine mount. (5) Apply lubricant conforming to specification MIL-M-7866 to the starter generator drive gear shaft. (6) Install gasket (78, figure 2-11) and starter generator (31) on the mounting pad. (7) Guide the engine into the test dolly mount ring, and secure the engine mount assemblies (8) to the engine mounting brackets (13) with bolts (7), washers (2), and nuts (1). (8) Remove the engine lifting sling from the engine and remove the lifting eye bolts. b.  Install engine instrumentation as follows: (1) Apply lubricant conforming to Specification MIL-M-7866 to the NI and Nil tachometer generator drive gears. (2) Install the NI tachometer generator (43, figure 2-11) and gasket (44) on the accessory drive gearbox. (3) Install the NlI tachometer generator (69) and gasket (72) on the overspeed governor and tachometer drive housing pad. (4) Install the vibration adapters (13, 96) and bracket (88), then install the vibration pickups (14 and 61, or 95 and 85). (5) Remove dust cover and install the exhaust assembly (1) using the V-band clamp (2).  Tighten the V-band clamp to 390 + 10 inch-pounds torque.  Install dust cover on exhaust assembly. (6) Install bleed band cable assembly (12). Tighten engine bolts and lockwire. (7) On T53-L-13 models install IGV bracket (50) and transmitter (56).  Connect to engine IGV actuator rod.  Tighten screws and lockwire.  Retain engine screws for reinstallation.  Connect IGV transmitter actuator rod to engine using bellows (52), clamps (53 and 54) and screws (55). (8) Install adapter (84), gasket (75), customer air valve (80), and gasket (79).  Tighten bolts and lockwire. (9) Install gaskets (57 and 91) and thermocouple assemblies (58 and 92) on engine combustor, using engine hardware and lockwire. (10)     Install packing (41) and union (42) in engine torquemeter pressure port. (11)     On all models except T53-L-13, L-13A and L-13B, install packing (3), reducer (4), fuel manifold (5) and union (6) in engine fuel manifold pressure port. 2-55