Service manual

CHARGING SYSTEM
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 4C-7
Drive Belt Tension Adjustment
Alternator
1. Install drive belt on pulleys and adjust tension as follows:
a. Pivot alternator away from engine, as required, until correct tension is obtained as
shown. Belt should depress 1/4in. (6 mm).
76094
a
b
a-Check Point
b-Alternator Pivot Bolt
b. After obtaining correct tension, securely retighten alternator brace attaching bolts
and alternator mounting bolts.
2. If a new drive belt has been installed, recheck belt tension after running for five minutes.
Troubleshooting Tests (Alternator on Engine)
Use the following tests in conjunction with the “Troubleshooting” in Section 1C. Before pro-
ceeding with the tests, however, perform the following checks to eliminate possible problem
areas. Also observe “Precautions,” earlier in this section, to prevent damage to alternator
system.
1. If problem is an undercharged battery, check to ensure that undercharged condition has
not been caused by excessive accessory current draw or by accessories which have
accidentally been left on. Also, check that undercharged condition has not been caused
by running engine at too low a speed for extended periods of time.
2. Check physical condition and state of charge of battery, as outlined in “Battery - Storage”
in Section 4A. Battery MUST BE at least 75% (1.230 specific gravity) of fully charged
to obtain valid results in the following tests. If not, charge battery before testing system.
3. Inspect entire alternator system wiring for defects. Check all connections for tightness
and cleanliness, particularly battery cable clamps and battery terminals.
4. Check alternator drive belt for excessive wear, cracks, fraying and glazed surfaces and
replace if necessary. Also, check drive belt tension and adjust if necessary, as outlined
under “Drive Belt Tension Adjustment.”
INDEX