Service Manual User Manual

Electrical System
10-45
Model 3606 • Origin 10/99
Figure 10– 36. Cummins alternator mounting detail.
a. Cummins Engine Bosch Alternator Removal
1. Disconnect the negative (-) battery cable (Fig. 10– 37)
at the negative (-) battery terminal.
Figure 10– 37. Disconnect the negative (-) battery cable
at the negative (-) battery terminal.
2. Install a 1/2" square drive ratchet into the square hole
in the tensioner bracket (2, Fig. 10– 36). Turn the
ratchet to lift the bracket and remove the engine fan
belt (3).
3. Label and remove all wiring from the rear of the
alternator.
4. Remove the lower mounting capscrew (4) securing
the alternator to the lower mounting tab (5) on the
engine.
5. While supporting the alternator with one hand,
remove the upper ("longer") mounting capscrew (6)
from the upper alternator mounts (7). Remove the
alternator from the vehicle.
b. Cummins Engine Bosch Alternator Installation
1. Position the alternator (1, Fig. 10– 36) between the
upper mounts (7) on the engine bracket. Align the
holes and insert the upper ("longer") mounting
capscrew (6) through the rear mount and alternator.
Thread the longer capscrew into the alternator front
mount. DO NOT tighten completely at this time.
2. Align the lower alternator mount hole with the lower
mounting tab (5) on the engine and insert the lower
mounting capscrew (4). Tighten the lower capscrew
(4) and upper capscrew (6) securely.
3. At the rear of the alternator, reattach all wires to their
proper terminals.
1. Alternator
2. Tensioner Bracket
3. Engine Fan Belt
4. Lower Mounting
Capscrew
5. Lower Mounting Tab
6. Upper Mounting
(“longer”) Capscrew
7. Upper Mounts
1
MA6190
MA1881
2
3
4
5
6
7
1
Belt rides in
pulley groove
CUMMINS ENGINE
OS1040
Negative (-)
Terminal