Gearbox And Epicyclical Reduction Gear Components: Specifications, Assembly Clearances And Permissible Wear - Fiat 411 R Service Manual

mount to fhe co-/er lower section the sector pia-fie and
fasten it wiih the two screws (2, Fig. 93); mount
also the gear selector pivot (3).
Before mounting ihe cover, shift in neufrai all gears.
Mount on gearbox-clutch contra! shaft, the flexible
joint, the suppcri, the bearing, and its disengagement
s/eeve.
Gearbox-ctufich control shaft.
Before mounting all parts on the primary shaft, be
sure that the sea! ring is 1'nsz'afied (Fig, 97),
NOTE: Shift the gear shift fever backwards, thus disengaging the reduction gear, in order to faciiitate
the operation of fastening the gearbox to the transmission casing.
GEARBOX AND EPKCYCUCAL REDUUHON GEAR COMPONENTS:
SPEGFICATIONS, ASSEMBLY CLEARANCES AND PERMESIBLE WEAR
, Wear
Bat? _ Assembly ciaaranhes T mm (In) limits
' mm (In) ' mm (in)
Between gearbox shaft ' 0,010 to 0,105 0,35
splines and their driving - {Q0004 to 0.0042) (03133)
and driven gears ,
Beiween gearbox driving w 0,10 to 0,20 0,50
3 and driven gear toath flanks , (Q0039 to 0.0079) (O-.0197)
i Between driver: gear pinion . _ W
' tooth flanks and the flanks _ 0.07 to 0,13 2 0,35
1 1 of epicyclicai fixad redu<:- (Q0028 to 0.0051) ' (Q9135) '
: tion gear j E
\
Epicyciical reduction driven gear ; 20,41to20,¢3 ,
needie seat diameter § 10.5035 to 0.8043) Y
1 , 0,01 m one 2 or
j Epyciclicaf reduction driven gear 2.99 10 3-9° 1 8e'W?en '?°"°HB$ an?' axie?' 5 (M004 to 0,0024) ' (0.0'0§9)
need," éiamaiel. _ (91177 to 93131) of eprcychcai reductlun dr|-
, '" ' Q ven gearS
E-Ipicyciicai reduction driven gears axis 14,-$00 to 14,389 I
diameter (05669 to 0.5665) _
I
Reverse shaft bush inner diameier 25,065 to 25,098 _.
{obtained by accurate tapping) 5 (£19868 to 0-9881) _
= - Between bush inner diam- 1 ; 0,065 to 0,119 0,30 ,
WV """""W WW Z" 1"" gr 7"" 777' Bier 9-fld H5 F9'/9l'$9 5115" ! (919925 £0 Q0947) . (Q0118)
Reverse shaft diameter = 25,000 to 24.979 E '
1 (09842 to 0.921.243 ; V
_ 7_ I '__ _____ ___ ___ , _ ____"
i i
5 Control rods release spring Gearbox seieciion release springs
g 1
Spring free Iength _ _ , , , _ , , _ _ _ 36,5 mm (14370 in) ' Spring free length . . . . . . . . . 21,2 mm (0.8-345 in)
Spring length under check load . . . . 31,5 mm (1.24CI2in] , Spring length under check Toad . . . 16,5 mm (£16495 in)
Check iuad . . . . . . . . . 14,710 15,3 kg {32,4 to 35.9 Ib) Check load _ . . . ' . . . {SA to 20,4 kg [40,6 to 45 lb) ,
1
63
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