Boeing F4B-1 - Electric Wiring; Ordnance

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SECTION XIV
ELECTRIC WIRING
35. Installation ..... .. . ... .. .. ..... ... .. . .
36. Maintenance ...... .. ... . .
Page
... .... ......... ..... .. ....... .. .. .. ... 37
. ..... .. · .. .... , .. .. ......... .. . 37
35. INSTALLATION (Reference Fig. 24): a. No difficulty should be ex-
perienced in the _installation of the wiring. \Yir~ ends are tagg~d as sho~ in ;F'i~.
24. Each wire 1s numbered and the letter md1cates the termmal to which 1t 1s
connected. All terminals and connections are to be insulated with the rubber
sleeves provided. The slack in the cabane s~rut jumper ~hould be tucked into the
wing and body. Note that Part No. 35 consists of two wires.
36. MAINTENANCE: Examine all terminals and connections occasionally
for corrosion and deteriorated insulation. Examine the insulation wherever the
wires are in contact with the airplane and if the insulation is found to be worn,
reinforce it with several layers of friction tape.
SECTION XV
ORDNANCE
P a ra grap h Page
37. Machine Gun Installation-30 Cal. Left and 50 Cal. Right... .. 37
38. Machine Gun Installation-30 Cal. Right ... .. . .... .... . .... .... .. .. . 38
39. Machine Gun Sight Installation ....... . ... .... ............ .. .. .. . .... ........ .. ....... 38
40. Camera Gun Installation ... ..... .. . . .. .... . ... ........ .. .. .... 38
41. Installation Type A-3 Bomb Rack-Left Wing.. .. ... .. . ... . .... ... .. .. ...... . ... 40
42. Installation Type A-3 Bomb Rack-Right Wing. ...... .. .... .. ..... . .. . ... .. .. .. ... 40
43. Installation Type C-3 Bomb Rack.. ......... . .. .... . .. .. .............. ... 40
44. Wing Tip Flares Installation. ..... ... . . ........ .. .. . .. .. .. .. .. . .. ... .. .. ...... .. . .. .. .. .. .. ... .. 40
45. Maintenance .......... . .. ...... .. .... .. ... 40
37. MACHINE GUN INSTALLATION-30 Cal. Left and 50 Cal. Right:
a. Remove the upper and lower cowling between sta. 2 and 3, and the upper cowling
between sta. 3 and 4.
b. Place the guns in position by passing them forward through the cockpit.
Install the trunnion bolts, mounting post bolts and the blast tube supports at sta. 1.
Remove the firewall cover plates, if in place, and insert the blast tubes through
the nose cowl. Secure the blast tubes to the guns and torward supports.
c. Lev el the airplane as directed in paragraph 10, page 13. Stretch a line
from the top rudder hinge to an upright on the crank shaft, the line to be plumb
over the thrust line. Now level the guns and blast tubes by means of the mounting
post bolts. The lat e ral alignment is obtained by dropping plumb-lines from the
line to level of the guns and tubes and taking lateral measurements to their center-
lines. Check the level again and tighten and lock all nuts.
d. Install the impulse wires and housings between the trigger motors and the
synchronizer upper connections. Attach the trigger control cables to the lower
synchronizer connections.
e. Check the synchronizer by turning the propeller by hand while the triggers
are held back. (The guns should not be loaded). The firing point, as determined
~y the operation of the trigger motor, should be from 4 to 8 inches behind the trail-
mg edge of the propeller.
See that nuts and bolts are safetied and replace the cowling.
f. The ammunition reels are loaded as follows: Remove the housing under the
reels and pl.a?e a box of ammunition in line with the feed chute. Carry the end ot
the ammun1t10n belt through the access hole in the feed chute, insert the first
round under the clip on the reel hub and rotate the reel to load. Access to the reels
may be had through a door in the body under the ejection chutes. Adjust the reel
brakes and repla ce the housings.
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