TM 5-2410-241-23-1
0023
TESTING AND INSPECTING DRIVE BELTS AND PULLEY
00023
N OT E
If new belt is installed, re-inspect belt after 30 minutes of operation.
1. Inspect belts (Figure 5, Item 2 and Item 4) for stretching, damage, cracking, glazing, or wear.
a. Replace drive belt if damaged, stretched, glazed, or worn. Refer to alternator V-belt set (WP 0098) and
A/C compressor V-belt (WP 0096).
b. If drive belts are OK, proceed to step 3.
2. Inspect drive belts (Figure 5, Item 2 and Item 4) for more than four cracks per inch (25.4 mm).
a. Replace drive belt if more than four cracks per inch (25.4 mm). Refer to alternator V-belt set (WP 0098)
and A/C compressor V-belt (WP 0096).
b. If drive belts are OK, proceed to step 4.
3. Loosen compressor (WP 0096), rotate A/C compressor pulley (Figure 5, Item 1), and inspect for smooth
operation.
a. If A/C compressor pulley does not rotate smoothly, replace A/C compressor (WP 0097).
b. If A/C compressor is OK, proceed to step 4.
4. Loosen alternator (WP 0098), rotate alternator pulley (Figure 5, Item 5), and inspect for smooth operation.
a. If alternator does not spin smoothly inspect alternator hub and pulley. Replace alternator (WP 0099).
b. If alternator is OK, proceed to step 5.
5. Rotate fan hub (Figure 5, Item 3) and inspect for smooth operation.
a. If fan hub does not rotate smoothly inspect fan hub. Refer to fan hub pulley inspection (WP 0095).
b. If fan hub is OK, tighten alternator V-belt set (WP 0098) and A/C compressor V-belt (WP 0096) and return
to troubleshooting.
0023-6