Belt Deflection

Inspect the drive belt deflection when the engine is cold, or at least 30 minutes after the engine has stopped. Apply moderate pressure, 22 lbs. (98 N), midway between the specified pulleys. See Fig 1 and Fig 2 . If the deflection is not within the specification, adjust as necessary. See BELT DEFLECTION/TENSION SPECIFICATIONS table.

Fig 1: Identifying Generator Drive Belt Deflection Measuring Point

Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying P/S Drive Belt Deflection Measuring Point

Courtesy of MAZDA MOTORS CORP.

BELT DEFLECTION/TENSION SPECIFICATIONS

Application

Specification

Generator

Deflection ⁽¹⁾

New

0.26-0.29" (6.5-7.5 mm)

Used

0.28-0.35" (7.0-9.0 mm)

Limit

0.39" (10.0 mm)

Tension ⁽²⁾

New

160-180 lbs. (690-830 N)

Used

110-150 lbs. (500-680 N)

Limit

88 lbs. (390 N)

Power Steering (With Or Without A/C)

Deflection ⁽¹⁾

New

0.30-0.35" (7.5-9.0 mm)

Used

0.32-0.37" (8.0-9.5 mm)

Limit

0.43" (11.0 mm)

Tension ⁽²⁾

New

140-170 lbs. (590-780 N)

Used

110-150 lbs. (500-680 N)

Limit

88 lbs. (390 N)

⁽¹⁾	Apply 22 lbs. (98 N) of pressure midway between the specified pulleys. A belt that has been on a running engine for less then five minutes.

⁽²⁾	Using Belt Tension Gauge (49 9200 020A), or equivalent, inspect the belt tension between any two pulleys.