62-11863 5-8
Brushes (every 5,000 hours)
• Ensure battery terminals and alternator exciting cable are disconnected
• Remove the two screws holding the regulator
• Replace the brushes
• Reassemble the regulator
5.3 SERVICING AND ADJUSTING V-BELTS WARNING
Beware of unannounced starting of the fans and V-belts caused by the thermostat and the start/stop cycling of the
unit that may start automatically.
5.3.1 Belt Tension Gauge
Figure 5.4 Belt Tension Gauge (Part Number 07-00203-00)
A belt tension gauge (P/N 07-00203-00), as shown in Figure 5.4 is recommended for use whenever V-belts are
adjusted or replaced. Check belt tension at midpoint of longest span between two pulleys.
Make sure the belt drive is static (not in motion).
5.3.2 Trapezoidal V-belt
Figure 5.5 V-belt Arrangement
5.3.3 Alternator Belt
a. Make sure the negative battery terminal is disconnected.
b. Tension is done by rotating the alternator around its pivot.
Table 5–2 Belt Tension
Belt New ft. lbs. (Nm) Running ft. lbs. (Nm)
Engine/Compressor 100-120 80-90
Motor/Compressor (135-162) (108-122)
Alternator 40-50 (54-68)
Water Pump Belt 30-50 (41-68)
Engine to compressor
Standby motor to alternator
Standby motor to compressor
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