Table of Contents
Advertisement
4.4 SERVICING AND ADJUSTING V-BELT
WARNING
Beware of moving V-belts and belt driven
components.
NOTE
Frayed, cracked or worn V-belts must be
replaced.
4.4.1 Engine V-belt
The V-belt is driven by a sheave on the engine drive
shaft and its function is to drive the blower fan, to cool the
engine by circulating air through the air cowling and out
through the air outlet frame. Adjustment is achieved
automatically by the idler pulley.
a. Replacing the V-Belt
1. Push spring loaded idler pulley inwards by hand.
Remove belt.
2. Use hand force only to push idler pulley. Replace
belt. Belt is tensioned automatically by idler pulley.
4.4.2 Alternator V-Belt
The alternator V-Belt is driven by a sheave on the
generator drive shaft. Adjustment is achieved by pivoting
the position of the alternator.
a. Replacing the V-Belt
1. Loosen the alternator pivot bolt and capscrew on
adjustment arm.
2. Replace belt. Use hand force only on alternator to
tighten belt. Do not use pry bar or excessive force as it may
cause bearing failure in the alternator. When belt is tight,
tighten the alternator bolts.
3. Check belt tension, correct specifications are
40-45 lbs. on the Burroughs gauge Carrier Transicold P/N
07-00203.
4.5 SERVICING THE GENERATOR
(MAIN ALTERNATOR)
4.5.1 Preventive Maintenance and
Operating Precautions
Costly repairs and down time can usually be
prevented by operating electrical equipment under
conditions which are compatible with those at which the
equipment was designed to operate. Follow the
instructions outlined below to insure maximum efficiency
of the electrical equipment.
a. Cooling
Keep all cooling parts clean and make certain
sufficient room is left on all sides for a plentiful supply of
fresh
coolant
air
TEMPERATURE RISE AS SHOWN FOR 80_C (176_F)
ABOVE A 40_C (104_F) AMBIENT. This ensures that
the insulation NEMA Class "F" will not be damaged. DO
NOT EXCEED RATED LOAD except as specified for the
equipment. OPERATE GENERATOR AT RATED
SPEED. Failure to operate generators at rated load or
speed will cause overheating and possible damage to
windings due to over voltage or current.
b. Bearing Replacement
Factory lubricated shielded bearings will normally
provide several years of trouble free service when
operated under normal conditions. Excessive bearing
load and adverse environment conditions will greatly
shorten bearing life. Should bearing failure occur,
bearings can be replaced. ALWAYS REPLACE WITH
THE SAME TYPE BEARING AS INSTALLED AT THE
FACTORY. CHECK PARTS LIST FOR PART NUMBER.
Include generator serial number when ordering bearings.
Do the following to remove bearing:
1. Remove bearing cap. (See Figure 4-3.)
1.
Bolt
2.
Bearing Cap
3.
Bearing
4.
Rotating Diode Bridge
Figure 4-3. Rectifier Removal
2. Remove bearing with the use of a bearing or wheel
puller.
3. Install new bearing. Ball bearings on Lima
generators are pre-lubricated and require no further
lubrication for the life of the bearing.
4. Replace end cap.
c. Rotating
Diode
Replacement
The rotating diode bridge can be removed and
replaced. Overcurrent, overvoltage, overspeed, or
reverse currents can cause damage to the assembly or any
of the component parts. The rotating diode bridge may
be removed through the bearing cap on the rear of the
generator. (See Figure 4-4 and Figure 4-3.)
4-4
flow.
DO
NOT
EXCEED
3
4
Bridge
(Rectifier
Assembly)
2
1
Advertisement
Table of Contents
