131-20
Upper Main Shaft
Bearing Block
(Factory Assembled)
Middle Main Shaft
Bearing Block
(Factory Assembled)
Bottom Main Shaft
Bearing Block
(Factory Assembled)
NOTE: Middle bearing block features
threaded holes.
NOTE: Upper bearing block features
smooth, wrench access holes
Hardware for these
assemblies
Assembly Tip
• If using JR brand servos or other
“tall” servos, MA131-47 Servo Rail
Spacers are included for proper
servo linkage alignment, if required.
• Do not supply thread lock at screws
marked with a (*) at this assembly
step. They will be removed again
later.
Apply a small amount of
medium thread lock when
threading into metal parts
0060-1 x 11
M3x6 Socket Bolt
0061 x 8
M3x8 Socket Bolt
0064-3
131-19
131-19
0064-3
135-487
0004 x 2
4mm Washer
0063 x 3
M3x10 Socket Bolt
131-420
131-442
131-180
131-440
0225-5
0273
0273-05
131-180
0225-5
131-493
131-483
0078-4
131-441
131-19
0064-3
131-21
128-90
0078-4
0004
0060-1
0060-1
0063
0061
0061
2700-01
0032
0060-1
0032 x 2
M3 Self Tapping Screw
0078-4 x 2
M4x8 Socket Bolt
(*)
(*)
(*)
(*)
(*)
2700-01 x 4
Blue M3 Washer
21