TM 55-4920-227-15
CHAPTER 2
INSTALLATION AND OPERATING INSTRUCTIONS
Section I. SERVICE UPON RECEIPT OF EQUIPMENT
e. Attach one end of a grounding strap to the frame
7. Unpacking Equipment
a. Cut and remove the metal straps from the crate
and secure the opposite end of the strap to any suitable
containing the test stand. Pry off the top, and dismantle
grounding source.
the sides of the crate to gain access to the unit. Remove
f. Tighten all electrical connections and check-the
the bolts securing the test stand to the crate base, and
wiring in accordance with wiring diagram (fig. 5).
use a suitable lifting device to raise the test stand
straight up, clear of the base.
Caution: The test stand is shipped without oil in
b. Remove the protective barrier material and
the gear case. Do not operate the test stand until
clean all preservatives from the test stand with cleaning
the gear case has been filled with the proper
solvent PP-S-661.
lubricating oil.
8. Inspection of New Equipment
10. Servicing New Equipment
a. Perform the before-operation services described
a. Perform
the
before-operation
services
b. Perform a complete visual inspection of the
equipment for any dents, cracks, breaks, and loose or
level plug on the side of the gear case (12). Fill the gear
missing parts.
case with the proper lubricant (para. 29) until the oil
c. Perform a general inspection of the test stand to
begins to flow from the oil level hole. Replace the oil
assure that all parts and assemblies are properly and
level plug and the oil filer plug (15).
securely installed and in good condition.
c. Install the blower and varidrive motor heater
d. Correct all deficiencies or report them to
elements (para. 11).
organizational maintenance.
Note. The test stand is shipped and connected
9. Installation or Setting Up Instructions
for 220-volt operation.
For 440-volt operation
a. Install the test stand in a cool well ventilated
perform operations prescribed in paragraph 11.
area not subject to heat or dripping moisture and never
in a location where hazardous processes are in use.
b. Locate and drill the bas e mounting holes in
head shafts for a clockwise rotation, and the blower for a
accordance with (fig. 7).
counterclockwise rotation. If either are reversed, refer to
c. Level, and secure the test stand to the base with
the wiring diagram (fig. 5) for proper connections.
four holddown bolts.
d. Remove the knock-out plug located on the right
Observe the operation of the varidrive for overheating,
side of the tarter box (5, fig. 1) and connect an input
and for any unusual or harsh noises before, during, or
power cable to the terminal block connecting lugs L1, L2,
after any speed changes. Reduce the speed to a
and L3 in accordance with the wiring diagram (fig. 5).
minimum and stop the test stand, the varidrive should
AGO 6729A
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