Fiat Generator R 115-140/24-1600 - Specifications; Reassembly Of Generator - Fiat 411 R Service Manual

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Reassembiy of generaéor.
After any repair or replacement and before reassembiing the generator proceed as foiiows:
a) biow away aii dust — chiefly carbon dust — from aii components. using an air jet;
b) oiean brush hoiders and the commutator end bracket from grease and carbon dust deposits, using
a dry cioth; "
0) ciean commutator surface, removing carbon dust between bars. Avoid using emery paper or cioth
soaked with gasoiineg or soivenis.
d) check brushes for play inside brush-hoiders, against the vaiuee iisted beiow:
—~ cross clearance . . . . . . . 0,1 to 0,3 mm (0.603? to 0.6113";
—~ and ciearance . . . . . . . . . . . . . . . . . i1,2':o 0,5 mm (0.6£i78" to G.0f9?"}
e) check brush spring pressure which shouici be 69 to 'F6 kg (1.521 to 1.675 1b.);
1') service with high meiting point grease the baii bearing, the commutator and bracket bush and the
recess at the end of the bushes (Hi, Fig: 123) and replenish with oii SAE 50 HD the wick of the same
bracket
The sequence shown in the chapter << Covering disassernbly» shouici be reversed to reassernbie the
generator. Mind that when assembiing the drive end bracket, its introduction may be facilitated by holding
iateraiiy both brushes and springs. -
After reassembiing, repeat the functionai checks as shown in paragraph << Bench testing the generator»,
FIAT GEEERATOR R 115-14€];'24 - 1600 Var. 2 - SPECIFICATIONS
i
; Items i Values
Speed . . . . , . . . . . . . . . , . . r.o.m. 9504150
Voltage . . . . . . . . . . . . . . . . . Q4 v
Current . . . . . . . . . . . . . . . . . 3-55 A i
Speed . . . . . . . . . . . . . . . .. f.§3.rn, goon '
Voltage . . . . , . . . . . . . . . . . , 28 v
Current . . . . . . . . . . . . . . . . . 5-55 A i
- oi 4:": min. ai 2006 r. .m.
i . ~ R""m"9 ' ' ' ' ' ' ' ' ' ' " 3 of 15 min. afi woe r.§.m.
Output current . . . . . . . . . . . . . 535$ 0,3 A I'
r . Voitage . . . . . . . . . . . . . . . . I QB V i
i ' Commutator temperature
( increment . . . . . . . . not more than: 90° C (£940 F} ' |
Casing temps-raiure '
increment . . , . . , . . not more than: 45° C (1130 F)
. - - _ ~ . ¢ - .
Operational test as motor
' Running genegaior before piotting oi the curve (hot condi-
tion-run duration: 50 minutes}, amp. versus re-vs . . .
. - § A . - - _
_' 1-leatingtesf . . . . . . . . , A . . , . . . - K
' Resistance, at 20°C: 3
—fieid-coils . . . . . . . . . . . . . . . . . . . . . . 3' 14,5-15,5 ohm.
i
— armature . . . . . . . . . . r . . . . . . . . . . . . '
i 0,520-0,545 ohm. i
r Commifiator bar maximum aiiowed out-of-round . . . . . ' 0,01 mm (().0OO39")
r Brush duration . . . . . . . . . . . . . . . . . . . . . 5
1500-2500 hours
I Pressure by springs on brushes (new) . . . . . . . . . _ = 0,59-0,76 R9 (1.521~'i.675 lb.)
' Brush cross clearance inside brush-holders . . . . . . . ' 0,1-0,3 mm (0.I3D39"-U.0f18")
Brush end clearance . . . . . . . . . . . . . . . . . . 0,3~0,6 mm (0.011?-0.0235')
r Diameter between poie shoes midlde fine . . . . . . . . i 70,6-?0,8 mm (2.'I79" -2,737")
Air gap . . . . . . . . . . . . . . . . . . . . . . . . . 0,3~Ei,-$57 mm (0.Q1i8"-0.0186") r
" Tightening éorque of drive puiiey not . . . . . . . . . . 7 kgm (50.63 ft.ib.)
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