Figure 4-42. Alternator cover, removal.

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Figure 4-41.8. Alternator testing. (Sheet 8 of 8)

TM-55-1905-217-12 Landing Craft Mechanized; Steel; DED; Overait Length 74 Feet Mod 1 Marl VIII Navy Design LCM-8 Hull Numbers 8500 and 8580 thru 8618 Manual

Figure 4-44. Electric starter and solenoid switch.

TM 55-1905-217-12

Figure 4-43. Alternator, removal.

Figure 4-42. Alternator cover, removal.

i. Installing Alternator.

4-50.

Electric Starting Motors (fig. 4-44)

a. General. Electric starting motors are installed on

(1) Install alternator in reverse order of

removal.

the outboard engines of each propulsion unit. The two

(2) Install and adjust belt.

electric starting motors, model numbers 1108850 and

1108890, are identical except for direction of rotation.

Model number 1108850 has a clockwise rotation, viewing

4-49.

Voltage Regulators

from the drive end, and is installed on the outboard

engine of the starboard propulsion unit. Model number

a. Description. The all-electronic transistorized

1108890 has a counterclockwise rotation, viewing from

voltage regulator is an electronic device using no

the drive end, and is installed on the outboard engine of

mechanical contacts or relays. When the voltage supply

the port propulsion unit.

is below a predetermined amount the transistor

b. Servicing Starting Motor Brushes.

conducts, acting like a closed switch between the supply

(1) Disconnect negative lead at battery.

voltage and the field of the alternator. When the supply

(2) Remove and tag solenoid switch leads.

is above a predetermined amount the transistor is cut off,

(3) Remove solenoid switch and switch

acting like an open switch which removes the excitation

support.

from the field, reducing alternator output.

(4) Remove starter cover band assembly.

(5) Inspect the brushes. The brushes must

b. Removal.

be making good contact with the commutator. If the

(1) Remove and tag voltage regulator

brushes are worn down to 5/16 inch (original length 1/2

electrical leads.

inch), replace brushes. Make sure that the pigtail leads

(2) Remove mounting nuts and remove

are tight in the brushes and the clips are fastened

regulator.

securely to the leads.

(6) Install cover band assembly, solenoid

c. Installation. Install voltage regulator in reverse

switch, and leads in reverse order of removal.

order of removal.

4-51