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TP-6200 10/12 147Section 3 Scheduled Maintenance
6. Replace the pressure cap.
7. Fill the coolant recovery tank to the low mark.
8. Operate generator set until the thermostat opens
when the upper cooling system hose warms.
9. Stop the engine and allow it to cool.
10. Check and repair any coolant leaks.
11. Remove the pressure cap.
12. Add coolant to bring the coolant level to just below
the overflow tube opening of the filler neck.
13. Replace the pressure cap.
14. Maintain the coolant level in the coolant recovery
tank between the high and low marks.
Note: Air pockets often form in the engine water
jacket when the coolant system is refilled.
Check the coolant level in the coolant
recovery tank after each generator set
operation and add coolant as necessary
until the coolant level stabilizes. Then check
the coolant at the interval specified in the
service schedule.
15. Reenergize the block heater, if equipped.
3.8 Radiator Fan Bolt Retorque
Adapted from Service Bulletin SB-683.
Check the radiator fan bolts after approximately 8 hours
of operation and then recheck after each 100 hours of
operation. This scheduled service is required on 1500--
2250REOZDC, 2500--2800REOZDB, and 3000/
3250REOZD unit-mounted radiator models using a
2743 mm (108 in.) diameter fan.
Perform the scheduled service steps in the order shown.
Required Tools
D Socket wrench sets American Standard and Metric
sizes
D Torque wrench, up to 203 Nm (150 ft. lb.)
Procedure
1. Place the generator set master switch in the OFF/
RESET position.
2. Disconnect the power to the battery charger, if
equipped.
3. Disconnect the generator set engine starting
battery(ies), negative (--) lead first.
4. Remove the fan guards, screens, and covers as
necessary to access the radiator fan hardware.
5. Inspect the blades for cracks or other damage.
Verify that all hardware is present. Replace as
needed.
6. Retorque the (32 qty.) blade retention bolts/nuts to
136 Nm (100 ft. lb.). See Figure 3-12.
7. Retorque the (12 qty.) hub boss cap screws to
102 Nm (75 ft. lb.). There are six screws on each
side of the fan.
1
GM18401-J
1. Blade retention bolts/nuts, 136 Nm (100 ft. lb.), qty. 32
2. Hub boss cap screws, 102 Nm (75 ft. lb.), qty. 12
3. Bushing cap screws, 43 Nm (32 ft. lb.), qty. 3
2
3
SECTION A--A
Figure 3-12 Fan Hardware Location and Torque
8. Retorque the (3 qty.) bushing cap screws to 43 Nm
(32 ft. lb.).
9. Replace the fan guards, screens, and covers that
were removed to access the radiator fan hardware.
10. Check that the generator set master switch is in the
OFF position.
11. Reconnect the generator set engine starting
battery, negative (--) lead last.
12. Reconnect power to the battery charger, if
equipped.