
Retrot/Upgrade Installation Instructions
C803D and C840D
Alternators
Thissymbolisusedtoindicatethepresence
ofhazardsthatcancauseminorpersonal
injuryorpropertydamage.
CAUTION
*Usethissetpointtomaintainproperbatterychargelevelduring
shorteroperatingcycles.
Table1—A2-330/A2-336RegulatorVoltageSelectorSwitchPosition
SwitchPosition BatteryType
1 27.5V Maintenance
2 28.0V Maintenance*
3 28.5V Maintenance-Free
4 29.0V Maintenance-Free*
If an extended wiring harness is supplied with
alternator and regulator, see separate instruc-
tions packed with harness.
Thissymbolisusedtoindicatethepresence
ofhazardsthatcancauseseverepersonal
injuryorsubstantialpropertydamage.
WARNING
Table2—A2-346RegulatorVoltage/BatterySwitchPosition
Switch
Position
A9-4036Harness
NotConnected
(VoltageSelect)
A9-4036Harness
Connected(BatterySelect)
1 27.5V Maintenance(DCatergory)
2 28.0V Maintenance-free(Group31)
3 28.5V AGM
4 29.0V
DO NOT USE POSITION # 4
A2-346regulator is flat-temperature compensated.
A2-34628Vregulatorcanbeusedwithorwith-
outA9-4036temperature-voltagesense/J1939
harnessfromthevehicle.
•WhenA9-4036temperature-voltagesense/
J1939harnessisnotconnected,regulatorwill
operateinxedvoltagesettingdetermined
bytheselectswitchpositiononthebottomof
theregulator.Seecolumn2inTable2.
• WhenA9-4036temperature-voltagesense/
J1939harnessisconnected,regulatorwill
automaticallyoptimizethechargevoltagefor
batterytypebasedontemperature.Seecol-
umn3inTable2andselectswitchposition
basedonbatterytype.
Regulator is factory-set to Position 1. To change, remove regu-
lator, turn regulator over, and select appropriate switch
position (see NOTICE above and Table 2). Re-install regulator
on alternator. Torque screws to 8.5 Nm/75 lb in.
NOTICE
Thissymbolisusedtoindicatespecialinstruc-
tionsoninstallation,operation,ormaintenance
thatareimportant,butnotrelatedtoper-
sonalinjuryhazards.
NOTICE
II65GPage 1 of 2
Figure1-AlternatorInstallationDetails
B+terminal–
seeinsetabove
B–terminalM10bolt–
torqueto15Nm/11lb.ft.
M20nut–torqueto
163Nm/120lb.ft.
Discspring
washer
B+terminalM12bolt–
torqueto30Nm/22lb.ft.
Batteryoutput
cableterminal
Washer
Lockwasher
Dampeningbracketmount–
seeinsetabove
Non-louveredductopeningtoattach
freshairintakepipe.SeeStep7,page2.
M10x1.5bolt,lockwasher,washer:2places–
torqueto27Nm/20lb.ft.
Secureto
engineblock
(seestep2cabove)
Boltandwasher
torqueto
57Nm/42lb.ft.
Nut
1. Turn off battery switch or disconnect battery ground cable.
2. Remove alternator drive belt.
3. Remove all oil lines between alternator and engine. Plug oil
line outlets with properly-sized pipe or tubing plugs. Remove
oil drain hose at existing alternator and plug opening.
4. Label wires for identification, then disconnect electrical con-
nections from existing alternator.
5. Remove alternator mounting bolts and existing alternator
from mounting bracket.
6. A2-330/A2-336regulators are flat-temperature compensated
and are factory-set at lowest setting to accommodate 8D
batteries. For other batteries:
a. Remove regulator from housing and change position on
voltage selector switch. See Table 1.
b. Re-install regulator on drive end housing, and torque
mounting screws to 8.5 Nm/75 lb. in.
7. Units are shipped with shaft collar, Belleville washer and
nut. Remove and discard shaft collar. Install pulley and
furnished Belleville washer. Torque nut to 162.7 Nm/
120 lb. ft.
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