TM 55-4920-328-13
Section IV. T53 TURBOPROP ENGINE.
2-22. Installation and Preparation of T53 Turboprop
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 2-17) on the test dolly
mount ring.
(2)
Install engine lifting eye bolts and sling, (not
part of the kit), and suspend engine at a suitable working
height.
(3)
lnstall three engine mount assemblies (8,
figure 2-17), 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 (84, figure 2-18) and starter
generator (33) on the mounting pad.
(7)
Guide the engine into the engine 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 (42,
figure 2-18) and gasket (43) on the accessory drive
gearbox pad.
(3)
Install the NIl tachometer generator (97)
and gasket (100) on the overspeed governor and
tachometer drive housing pad.
(4)
Install the vibration adapters (16, 93),
bracket (81), and the vibration pickups (19, 87, and 58
or 92).
(5)
Remove dust cover and install 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 (31).
Tighten engine bolts and lockwire.
(7)
On T53-L-15 models, install IGV bracket
(49) and transmitter (48). Connect to engine IGV
actuator rod. Tighten screws and lockwire. Retain
engine screws for reinstallation. Connect IGV
transmitter actuator rod to engine using bellows (53),
clamps (52, 54), and screws (55).
(8)
Install adapter (75), gasket (71), customer
air valve (76), and gasket (79).
(9)
Install gasket (88) and thermocouple
assembly (89) on engine combustor, using engine
hardware and lockwire.
(10) On T53-L-7 model engines install packing
(46) and union (47) in engine torquemeter pressure port.
(11) On T53-L-7 model engines install packing
(3), reducer (4), fuel manifold (5), and union (6) in
engine fuel manifold pressure port.
(12) Install existing engine washers, fitting (7 or
8), elbow (9), static line assembly (10), and union (11) in
combustion chamber static pressure port.
(13) Install packing (28), union (29), hose
assembly (30), and fitting assembly (32) in engine oil-in
port.
(14) On T53-L-7 models install packing (26) and
union (27) in engine gearbox pressure port.
(15) Install packing (24) and union (25) in engine
gearbox vent port, and elbow (12V6X-SS).
(16) Install packing (130), reducer (131), and
elbow (132) in torque boost port.
(17) Deleted.
2-80
Change 2
