TM 55-4920-328-13
I. Check the drive belts in the cooling tower
module for correct tension and evidence of damage.
When depressed with one finger with moderate
pressure, each belt should deflect approximately 1/2
inch.
m. Check the data acquisition assembly for
damage and security of mounting on the engine test
dolly assembly.
n. Check the cable connections in the
instrumentation sub-modules in accordance with the
information contained in tables 2-1 through 2-4, and as
shown in figure FO-1 located in the back of this manual.
o. Check the cable connections between the
instrumentation sub-modules and the interior of the
control cab module as shown in figure 2-1.
2-3. Positioning of Trailers.
It is recommended that the METS trailer assemblies be
operated in a remote location due to the high sound
pressure levels generated during an engine firing. Tow
the units to the selected site and position the trailer
assemblies on high, firm, level ground. After locating
the units as shown in figure 2-2, proceed as follows:
a. Engage the parking brakes on each trailer
assembly by moving the brake lever to a position
parallel to the trailer longitudinal frame assembly.
b. Disconnect the safety chains and drawbar from
the pintle of the prime mover or tow vehicle.
c. Remove the drawbar from each trailer
assembly and stow the drawbar in a dry area and away
from the work areas of each unit.
d. Install and deploy the forward and aft, left and
right leveling jacks (11, figure 1-3) on the test trailer
assembly to static ground level. Secure the leveling
jacks in the extended position.
e. Deploy the forward and aft, left and right
leveling jacks (4, 8, figure 1-32) on the auxiliary trailer
assembly to static ground level. Install the braces and
secure the leveling jacks in the extended position.
f. Remove the cab steps assembly (15, figure 7-
2) from the interior of the control cab module. Attach
the steps to the left side of the test trailer frame beneath
the door using the bolts (18), washers (17), and nuts
(16). Tighten the nuts securely.
NOTE
The fore and aft, and transverse, level of the
test trailer and auxiliary trailer is not critical.
Ensure an adequate supply of water is in the
auxiliary trailer water system. Service the
water system only after all interconnections
are made, then visually recheck the level of
the auxiliary trailer by noting the level of
water in the upper tank.
g. Level each trailer assembly using the crank
handles on the leveling jacks.
h. Remove the attaching parts (140, 141, 142,
figure 7-14) from the lower hole in the upper part of the
beacon mounting brace assembly (139).
i. Raise the beacon light (130) to the operating
position. Secure the unit by attaching the beacon
mounting brace assembly (139) to the clevis (143),
using the bolt (142), washer (141), and nut (140).
Tighten the nut securely.
j. Remove the data acquisition assembly (5,
figure 1-28) from the shipping container and install the
unit on the left side of the engine test dolly assembly.
k. Remove the tiedowns from the motor in the
heat pump (8, figure 1-21).
I. Remove the manual drain valves (3, figure 1-
10) from the control cab module. Remove the
polyethylene plugs from the manual drain valve ports in
the fuel tank assembly (1) and install the valves, then
close each valve finger-tight after installation.
2-2
