C.E. Niehoff & Co. C621 Instructions
C621
Drive End (DE) or
Anti-drive End (ADE) Stator
Replacement Instructions
C621 alternator has a special
CAUTION
splice connecting the Y leads
between the ADE and DE stators
which must be handled carefully
for the stators to function prop erly after replacement.
The steps in this instruction sheet
replace the corresponding steps
in the CEN 600 Series Service
Manual SM6.
Before replacing stator, verify
NOTICE
that the correct replacement
stator is used. See additional
instructions provided with
stator.
If replacing DE stator, only DE
NOTICE
stator should be removed.
If replacing ADE stator, both
stators should be removed.
Section E in CEN 600 Series Service Manual
SM6:
14. Remove ADE and DE Stators
(See Figure E-7)
a. Ensure scribe marks are visible on DE and
ADE edges of shell where tabs are missing
on DE and ADE stators.
b. Remove long nuts securing through-studs.
Remove through-studs.
c. Cut the middle of interconnect splice holding Y
leads to separate the stator connections.
d. Arrange CEN A10–132 field coil/stator tool.
e. Press DE stator out of shell.
Do not damage phase
leads when removing
stators from shell.
f. If replacing ADE stator, rearrange tool and
press ADE stator from shell.
CAUTION
II202A
Interconnect splice
First press out
DE stator
from shell
Then press out
ADE stator
from shell
Figure E–7 Removing Stators
Page 1 of 4
Section F in CEN 600 Series Service Manual
SM6:
If replacing ADE stator or both
NOTICE
stators, start with step 2a.
If replacing DE stator only, start
with step 2d.
2. Install new ADE Stator or both new ADE/
DE Stators
CAUTION
when inserting stators in shell.
a. Set new ADE stator (longer phase leads face
down) on ADE edge of shell. Align scribe mark
on shell where tab is missing on ADE stator.
Arrange CEN A10–136 stator insertion tool on
stator. See Figure F–1a.
b. Press new ADE stator into position using a
spray lubricant if necessary. Make sure the
stator stops on the ledge inside the shell.
See Figure F–1a.
c. From the anti-drive end, insert 6 insertion
studs provided with CEN A10-136 stator inser tion tool into new ADE stator. See Figure F–1b.
Do not damage phase leads
A10–136
stator
insertion
tool
ADE stator
Ledge inside shell
Original
scribe
mark
on shell
Missing
tab on
ADE stator
Figure F–1a ADE Stator Assembly
Stator
insertion
studs (6)
Page 2 of 4
Figure F–1b Stator Insertion Studs
II202A
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