Drive Belt - Tension Adjustment Update
88mitsubishi02SUBJECT:
PRECIS DRIVE BELT TENSION - SERVICE MANUAL UPDATE
NO. TSB-88-00-001
DATE April, 1988
MODEL 1988 Precis
TSB Revision: TSB-88-00-001
PURPOSE
This bulletin describes a procedure for checking drive belt tension on 1988 Precis vehicles. To prevent drive belt slip noise, it is important that the drive belt tension is properly adjusted.
In addition, the drive belt tension specification for 1988 Precis vehicles has been changed. As reference to this bulletin, please write the TSB number at the bottom of the following pages in the 1988 Precis Service Manual.
Affected Service Manual Pages: 10-5, 10-15, 20-5, 25-7, 27-5, 97-9
FIGURE 1:
DRIVE BELT TENSION CHECK PROCEDURE
1) If available, use a belt tension gauge (Figure 1) to check drive belt tension.
FIGURE 2:
2) Install the gauge on the belt at the location shown in Figure 2 and check to see if belt tension is within the specification of 35-50 kg (76-110 lbs.).
FIGURE 3:
3) If a belt tension gauge is not available, check the belt tension by measuring the deflection of the belt between the alternator and water pump pulley (Figure 3). The new specification for belt deflection is 7 - 8.2 mm (0.28 - 0.32 in.).
A. Depress the drive belt midway between the water pump pulley and the alternator pulley with a force of 100 N (22 lbs.) (Figure 3).
B. Measure the belt deflection while depressing the belt.
SERVICE MANUAL CHANGES
Revise the drive belt deflection specification in the 1988 Precis Service Manual from 7 - 9 mm (0.28-0.35 in.) to 7 - 8.2 mm (0.28 - 0.32 in.) as shown below.