Front Housing – Stator, Field Coil & Shell Assembly - Komatsu 930E-2 Shop Manual

FRONT HOUSING – STATOR, FIELD COIL &
SHELL ASSEMBLY
1. Support stator, field coil & shell assembly on
blocks, with the six phase leads (black wires) and
the two field leads (white wires) pointing up.
Note: Care must be used when setting stator, field coil
& shell assembly on blocks that neither the stator
windings nor the studs are damaged.
2. Set the front housing-rotor, shaft & core assembly
into the stator, field coil & shell assembly (core
goes through the field coil bobbin). Align mount-
ing foot of front housing with mounting foot on
shell (Figure 13-27). As the shell studs come
through the holes in the front housing, guide the
six phase leads (black wires) and two field leads
(white wires) through the large openings in the
front housing (Figure 13-27).
3. Make sure that shell and front housing are seated
together completely.
4. Fasten front housing to shell by installing nine
flanged locknuts on shell studs (apply Loctite to
studs before installing locknuts). Torque flanged
locknuts to 18 in. lbs. (2.0 Nm) maximum.
FIGURE 13-27.
1. Mounting Foot
2. Phase Leads
M13-20
3. Field Leads
4. Drain Holes
Niehoff Alternator Overhaul Manual
5. Route the two field leads (white wires) through the
hole in the front housing to the control box. Con-
nect the field leads to the control box terminal
strip; one lead to the "B+" terminal the other lead
to the "F" terminal (Figure 13-28, Figure 13-4).
Note: Do not allow sleeving on leads to slide down
leads; phase terminal without sleeves can short to front
housing.
FIGURE 13-28.
1. Field Leads
6. Using 6 nuts (coat with Loctite) attach the six
phase leads (black wires) to diode studs.
Note: Insulator and washer placed over positive diode
stud before securing phase terminal for positive diode
locations. Refer to Figure 13-29. If insulator or washer
were lost during disassembly, replace before attaching
phase lead.
7. Rotate shaft and make sure rotor does not contact
wires.
8. Coat the six phase terminals and the two field
terminals with RTV Silicone Rubber, type 3141
(flowable type). If control unit assembly requires
a replacement, skip step 9 and proceed to Control
Unit Assembly Replacement.
9. Use five screws (coat with Loctite) to attach
control box cover to control box. Torque screws
to 20 in. lbs. (2.2 Nm).
2. Phase Leads
M13003 04/01