ALTERNATOR
11-8
6LPA Service Manual
Test and Inspection
© 2007 Yanmar Marine International
TEST AND INSPECTION
Drive Belt Inspection
1. Visually check for cracks, oil on surface, wear
and damage. The belt should not contact the
bottom of the pulley groove (Figure 11-3).
Replace the belt as necessary.
Figure 11-3
Figure 11-3
1 – Clearance - Pulley to Belt
2 – Correct Belt Running Height
3 – Incorrect Belt Running Height
2. Check drive belt tension by pressing on the
drive belt as shown in (Figure 11-4) with
10 kgf·cm, 98 N·m (22.0 lbf) of force to check
the deflection of the drive belt.
Drive belt deflection:
• New Drive Belt (Belt that has less than 5
minutes of usage) 6 to 8 mm (0.236 to
0.314 in.)
• Used Drive Belt (Belt that has more than 5
minutes of usage) 8 to 11 mm (0.314 to
0.433 in.)
Figure 11-4
Figure 11-4
3. Adjust or replace the belt if necessary. Operate
the engine for 5 minutes and then re-check belt
deflection and adjust as needed.
General Inspection
1. Visually check the wiring for damage, proper
routing and for loose terminals (Figure 11-5).
Figure 11-5
Figure 11-5
2. Check for abnormal sounds generated from the
alternator while the engine is running.
0004
8
26
(1)
(2)
(
3
)
0004
8
27
0004
8
2
8
