TM 11-6625-298-14
ME-26/U the following resistors are
b. Lift out the old meter window glass and clean
required.
away old insulating compound from around the
(1) Ten
resistors, 0.1 megohm, prercent.
meter scale aperture.
c. Spread new insulating compound around the
(2) Ten
resistors, 1 megohm percent.
(3) Ten
resistors, 10 megohms percent.
scale aperture and press the new meter window
glass in place.
(4) Ten
resistors, 100 megohms percent.
NOTE
d. Press the bezel down firmly over the glass.
Before calibrating a new meter scale, check
the output voltage of the ohmmeter (para
a. Remove the four screws that hold the pillow
6-5 b). If the output voltage is above 550
blocks in place (fig. 1-2).
volts or below 500 volts, replace the
b. Lift off the pillow blocks.
controller.
c. Lift the old cover out of the recess above the
meter window into which it fits.
proceed as follows:
d. Install a new cover and replace the pillow
(1) Connect the line and ground terminals
blocks.
together and turn the hand generator crank at
operating speed. The meter pointer should deflect
to the right-hand end of the blank scale plate. This
point is zero calibration on the scale; mark the
drive assembly gear train are lubricated by the
manufacturer and ordinarily will require no further
point in pencil.
lubrication. When the generator is disassembled
(2) Remove the connector between the line
for repair, however, the following lubrication shall
and ground terminals and again turn the hand
be performed at the general support maintenance
generator crank at operating speed. The pointer
level.
should deflect to the opposite end of the blank
b. Disassembly. The ohmmeter shall be
scale plate. This is the infinity point on the scale;
mark this point in pencil.
disassembled, inspected, and cleaned in accordance
with instructions given in paragraphs 4-5 and 6-4.
(3) Connect resistors (a above), singly or in
Remove four screws which hold chassis to the end
series, to obtain the various values of resistance
shield. The chassis and end shield may now be
such as were indicated on the original scale (fig. 6-
4). Connect the resistors between the line and
separated, exposing all gearing. The internal or
ground terminals of the ohmmeter. Turn the hand
ring-gear will remain within the end shield (fig. 5-1
generator crank at operating speed each time.
and 5-2).
CAUTION
Mark each resistance value on the blank scale plate
Do not lubricate any portion of the clutch
in pencil.
mechanism or the drive shaft and lock pin.
c. Marking. Remove the meter scale plate from
This also applies to the ratchet and drive
its bracket and draw in the new points of
spring of older models.
calibration with India ink. Use a straightedge and
c. Lubrication. Apply a small amount of grease
a draftsman's ruling pen.
(Aircraft and Instruments-GL) to the generator
ball bearings and the entire drive assembly gear
The clutch should be tightened all the way down to
train. Wipe off excess with a clean, lint-free cloth.
prevent slipping. The operating voltage is
Grease (GL) is an all-weather lubricant; no special
maintained by the controller, not by the clutch.
precautions are necessary when it is used in ex-
treme climates.
a. Equipment Required. In addition to
Section IV. GENERAL SUPPORT TESTING PROCEDURES
6-18. General
This section contains references for use by general
Perform the tests in paragraph 6-5a and 6-5b.
support maintenance personnel to determine
whether the performance of the repaired equipment
is satisfactory for return to the users.
