C7.1 Engines for Caterpillar Built Machines Caterpillar

The 12 V and 24 V Type 1 Alternators

Illustration 1	g02149533
Typical example

(1) Terminal "B+"

Tighten the nut on the terminal to the following. ... 8 N·m (71 lb in)

(2) Terminal "D+"

Tighten the nut on the terminal to the following torque. ... 2.2 N·m (19 lb in)

(3) Terminal "B-" (if equipped)

Tighten the nut on the terminal to the following torque. ... 7 N·m (62 lb in)

(4) Terminal "W"

Tighten the nut on the terminal to the following torque. ... 2.2 N·m (19 lb in)

Tighten the nut for the alternator pulley to the following torque. ... 95 N·m (70 lb ft)

Output

The outputs of the alternators ... 55 Amp, 80 Amp, 100 Amp, 120 Amp, 150 Amp, or 175 Amp

The 24 V Type 1 Heavy Duty Alternator

Illustration 2	g01943778
Typical example

(1) Terminal "B+"

Tighten the nut on the terminal to the following. ... 7 N·m (62 lb in)

(2) Terminal "R"

Tighten the nut on the terminal to the following torque. ... 2.2 N·m (19 lb in)

(3) Terminal "B-"

Tighten the nut on the terminal to the following torque. ... 6 N·m (53 lb in)

(4) Terminal "I"

Tighten the nut on the terminal to the following torque. ... 2.2 N·m (19 lb in)

Tighten the nut for the alternator pulley to the following torque. ... 102 N·m (75 lb ft)

Note: A washer must be installed between the grounding strap and the alternator at the "G" Terminal.

Output

The output of the alternator ... 105 Amp

The 24 V Type 2 Alternators

Illustration 3	g02149536
Typical example

(1) Terminal "B-"

Tighten the nut on the terminal to the following. ... 4 N·m (35 lb in)

(2) Terminal "B+"

Tighten the nut on the terminal to the following torque. ... 18 N·m (13 lb ft)

Tighten the nut for the alternator pulley to the following torque. ... 126 N·m (93 lb ft)

Output

The outputs of the alternators ... 80 Amp, 95 Amp, or 150 Amp

The 12 V and 24 V Type 3 Alternators

Illustration 4	g03122521
Typical example

(1) Terminal "D+"

Tighten the nut on the terminal to the following. ... 4 N·m (35 lb in)

(2) Terminal "B+"

Tighten the nut on the terminal to the following torque. ... 15 N·m (11 lb ft)

(3) Terminal "B-"

Tighten the nut on the terminal to the following torque. ... 6 N·m (53 lb in)

(4) Terminal "R"

Tighten the nut on the terminal to the following torque. ... 4 N·m (35 lb in)

Tighten the nut for the alternator pulley to the following torque. ... 95 N·m (70 lb ft)

Output

The outputs of the alternators ... 115 Amp, 145 Amp, or 200 Amp

Alternator Bracket

Illustration 5	g01946433
Typical example

(1) Tighten the setscrews that secure the alternator to the bracket to the following torque. ... 50 N·m (37 lb ft)

(2) Tighten the setscrews that secure the bracket to the cylinder block to the following torque. ... 44 N·m (32 lb ft)