Altitude-knob disassembly
RESTRICTED
CAUTION: Tapcasewith fiber drift and mallet
if case is hard to remove.
Rotate
case so as to remove evenly.
The
spring clutch holder may stick to
the
shaft.
Check
so the holder
will free shaft at
same time the
case comes off.
This will prevent
damage to the spring.
5.
Remove washer.
6.
Tap taper pin
from high altitude spring
clutch holder.
7.
Loosen
3 set screws and remove case and
spring.
Remove 3 screws holding fiber friction
ring and
adjusting springs.
Remove
friction collar.
I0. Remove altitude knob flange.
I. Clean ali parts and lubricate with film
of light oil.
12. Oil bearings with one drop of light bomb-
sight oil every 50 hours.
CAUTION:
Do not oil
the fiber friction ring
nor the metal collar which
it en-
C. Search
Knob
B.
Reassembly.
1.
Replace altitude knob flange.
2.
Friction collar stop.
3
Friction
ring.
4. Aajusting
spring
(Flat brake spring)
5.
Replace high altitude spring and case.
6.
Replace taper pin in spring clutch holder.
7.
Replace washer.
8.
Replace low altitude spring
and case.
9.
Replacescrew and washer holding low al-
titude spring clutch holder in place.
I0. Adjust
for correct speeds
and replace
calibrated knob.
Calibrate knob as per C.L. I. B-43-5.
A.
Disassembly and Reassembly.
1.
2.
Remove from
case,
2 screws.
if dirty or shaft
is binding.
a. Tap out taper pin, remove pinion and
shaft.
b. Ciean
, lubricate with film of light
oi! and reassemble.
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