SkyTrak 6042 Service Manual - Manual (Page 202)

Engine: Cummins 4BT3.9
7.8 Model 6042 Legacy Origin 7/02
Note: Drain approximately two quarts (2 liters) of
coolant.
4. Slowly turn the radiator cap (not shown) to the first
stop and allow any pressure to escape. Remove the
radiator cap. Place a funnel at the base of the
radiator to channel the drained coolant into a
container. Open the radiator petcock (Fig. 7-3, 1),
and allow the coolant to drain into the funnel.
Transfer the coolant into a properly labeled container.
Dispose of properly. Close the radiator petcock.
Figure 7-3 Drain the Radiator and Overflow Tank
5. This engine is equipped with an automatic belt
tensioner (Fig. 7-4, 1). Insert a 1/2" drive ratchet or
breaker bar into the square hole (2) in the automatic
belt tensioner housing (1) and remove the tension
from the fan drive belt (3).
6. While lifting the automatic belt tensioner (1) away
from the belt, remove the fan drive belt (3).
Figure 7- 4 Fan Belt
7. While applying pressure to the automatic belt
tensioner, remove the fan drive belt (Fig. 7-4, 3).
8. Loosen the lower alternator bracket capscrew
(Fig. 7-5, 1) on the bottom of the alternator (2).
Remove the upper alternator mounting capscrew
(3), and lower the alternator.
Figure 7-5 Alternator Capscrews
WARNING:
Hot coolant can cause
severe burns or eye injury. NEVER remove the
radiator cap while the engine is hot. The
cooling system is under pressure. Wear
protective clothing and safety glasses.
OA1310
1
MT1840
3
1
2
4
MA61902
1
3
2