TB 55-4920-329-35
Section II. CALIBRATION
lists required accessories. Tables 1 and 2 are provided
6. Equipment and Accessories Required. Table
to assist in the selection of required equipment and
1 lists minimum use specifications of
equipment required
accessories. For specific item identification refer to
Table 1. Minimum specifications of equipment required
Item
Common name
Minimum use specifications
No.
A1
RANGE: 0-1500 RPM
SET
ACCURACY: + .5%
A2
TORQUE, CALIBRATOR
RANGE: 10-230 lb @ 5 ft
ACCURACY: + 2%
A3
BALANCE, WEIGHT
RANGE: 5-150 Lb, class C.
SET
A4
STANDARD, WEIGHT
RANGE: 140 Lb, class C.
SET
A5
FRACTIONAL,
Class C,
WEIGHT SET
Table 2. Accessories required
Item No
Common name
Description
B1
SPLINE ADAPTER
B2
LEVEL
Bench type
(2) Connect torque calibrator (A2) to spline
7. Preliminary Procedure.
adapter. The horizontal plane of the arm on the torque
calibrator should be from 20 to 5 above level as shown
Note. Personnel should familiarize themselves with the
(3) Lock brake on UUT by turning LOAD
a. Visually inspect UUT for any physical signs of
control handle clockwise (in toward control panel).
damage.
(4) Add weights from weight sets (A3, A4, AS)
b. Fabricate spline adapter as shown in figure 2.
to weight carrier until the indications listed in Table 3 are
obtained.
Note. When the UUT is not within tolerance, perform the
specified adjustments and continue performance check.
(5) The indications observed on the UUT
When the UUT is not within tolerance and no adjustment
should not exceed the limits specified in Table 3.
is specified, the deficiency must be corrected before
continuing with the procedure.
Note. If an out-of-tolerance condition was observed
during the preceding performance check, annotate DA
8. Torque Indicator.
Form 2416 in accordance with TM 38-750.
a. Performance Check.
b. Adjustments. No adjustments can be made.
(1) Connect spline end of spline adapter (B1)
onto splined output shaft of UUT as shown in figure 1.
3