Adjusting Generator Drive Belt

NOTE: Letters in parenthesis refer to letters in figures.

Remove the engine cover.
Loosen generator installation bolt (A) and lock nut (B). See Fig 1 .
Adjust the drive belt deflection and tension by turning adjusting bolt (C) to the specification. See BELT DEFLECTION SPECIFICATIONS or BELT TENSION SPECIFICATION table. See Figure .
Tighten generator installation bolt (A) and lock nut (B) to the specified torque. See TORQUE SPECIFICATIONS .
Crank the engine and measure the deflection and tension again. If not within the specification, repeat step 2 again.

Fig 1: Adjusting Generator Belt

Courtesy of MAZDA MOTORS CORP.

BELT DEFLECTION SPECIFICATIONS

Application

⁽¹⁾ In. (mm)

A/C Belt

New ⁽²⁾

0.11-0.14 (3.0-3.8)

Used

0.13-0.15 (3.3-4.0)

Limit

0.21 (5.5)

Generator Belt

New ⁽³⁾

0.16-0.17 (4.0-4.5)

Used

0.18-0.19 (4.5-5.0)

Limit

0.24 (6.0)

⁽¹⁾	With 22 lbs. (10 kg) applied to belt.

⁽²⁾	Operate the A/C drive belt for 5 minutes or more while idling the engine. Then adjust belt to the used belt deflection specification.

⁽³⁾	Operate the generator drive belt for 1 minute or more while idling the engine. Then adjust belt to the used belt deflection specification.

BELT TENSION SPECIFICATION

Application

⁽¹⁾ Tension - Ft. Lbs. (Kg.)

A/C Belt

⁽²⁾ New

126-158 (57.1-71.9)

Used

117-138 (53.0-62.9)

Limit

59.6 (27.1)

Generator Belt

⁽³⁾ New

140-172 (63.3-78.2)

Used

117-149 (53.0-67.9)

Limit

77.3 (35.1)

⁽¹⁾	Belt Tension Gauge (49 9200 020A), or equivalent is required to check belt tension. See Figure .

⁽²⁾	Operate the A/C drive belt for 5 minutes or more while idling the engine. Then adjust belt to the used belt tension specification.

⁽³⁾	Operate the generator drive belt for 1 minute or more while idling the engine. Then adjust belt to the used belt tension specification.