Chevrolet 10 Series 1970 Service Manual page 409

battery condition a fte r a s e rv ic e p eriod o f reasonable
length.
8. F o r an overch arged battery, lo w er voltage setting
by turning one notch and then check fo r an im ­
S e rv ic e Operations d escrib ed in the follow ing section
a re fo r the 5.5" S e ries
S e rie s 2D, Type 150 D elcotron and 6.6" S eries 4D,
T yp e 150 D elcotron. W here im portant d ifferen ces in
testin g and/or s e r v ic e
separate mention w ill be made o f the three gen erators.
GENERATOR
Pulley Replacement
Single Groove Pulley
1. P la ce 15/16" box wrench on retaining nut and in sert
a 5/16" alien wrench into shaft to hold shaft while
rem oving nut (fig . 17c).
2. R em ove washer and slide pulley fan and spacer from
shaft.
3. R e v e rs e Steps 1 and 2 to in stall, use a torque wrench
with a c ra w -fo o t adapter (instead o f box wrench) and
torque the nut to 50 ft. lbs. (fig . 18c).
Double Groove Pulley
1. P la ce a 15/16" socket
d riv e end or use Adapter J - 21501 and a box wrench)
on retaining nut, in sert a 5/16" alien wrench through
socket and adapter into hex on shaft to hold the
shaft while rem ovin g the nut.
2. R em ove washer and slid e pulley fan and spacer from
shaft.
3. T o in stall, slid e fan, spacer, pulley and washer on
shaft and start the nut.
15/16
SOCKET
^ ^ A D A P T E R
5/16 ALLEN
F ig . 18c—T o rqu in g P u lle y N u t
SERVICE OPERATIONS
ID aluminum D elcotron, 6.2"
operations are encountered,
(with wrench flats on the
proved battery condition a fter a s e rv ic e p erio d of
reasonable length.
If the regu lator cannot be adjusted to a value within
9.
the specified range, replace the regu lator.
4. Use the socket and adapter with a torque wrench
and tighten nut to 50 ft. lbs. torque.
Removal and Installation
1. Disconnect battery ground strap at battery to preven t
dam aging w irin g harnesses.
.
2
R aise and support veh icle.
3.
Disconnect w irin g leads at Delcotron.
4. R em ove gen erator brace bolt and detach d riv e belt.
5.
Support gen erator and rem ove generator mount bolt
(6.2" D elcotron uses 2 mount bolts) and rem ove
from veh icle.
.
6
R e v e rs e rem ova l procedu re to install, then adjust
d rive belt.
Brush Replacement
6.2
' Delcotron
1. Rem ove two nuts retaining the blade connectors and
rem ove the connectors (fig . 20c). Slide the indicator
light re la y w ire from the term inal post.
.
2
Rem ove two screw s retaining the capacitor and brush
holder to re a r end fra m e.
NOTE: Capacitor lead is connected inside the
gen erator. A llo w capacitor to rem ain with the
gen erator to avoid undue strain on the lead w ire .
3. Inspect brushes fo r w ear. If they a re worn halfway,
rep la ce. Inspect brush
weakening. If brushes appear sa tisfa ctory and move
fr e e ly in brush holder,
4. T o install brushes, push brushes into holder and
install pin to keep the brushes in holder.
Attach brush a ssem bly and condenser to the end
5.
fram e with hex-head
TERMINAL AN D NUT
ASSEMBLY
BUSHING
BRUSH HOLDER
M O U N T IN G SCREW
Fig. 19c— D e lc o tro n Brush H o ld e r Assem bly
ENGINE-ELECTRICAL 6Y-17
Rem ove brush holder.
springs fo r distortion o r
springs may be reused.
stud on the le ft side only.
BRUSH LEAD
G R O U N D CONDENSER
STUD LEAD
-2958
t
CHEVROLET TRUCK SERVICE MANUAL