POWER TRAIN 2250 SERVICE/MAINTENANCE MANUAL
7-16
Published 11-06-15, Control # 040-13
Semiannual Checks
1. Inspect fill cap and thermostat for proper operation and
replace worn parts:
- Fill cap relieves at 14 psi (0,97 bar).
- Thermostat closes at 218°F (103°C) and opens fully
at 238°F (114°C).
2. Inspect water pump belts for wear and proper
adjustment (see engine manufacturer’s manual).
3. Inspect cooling system hoses for deterioration and other
defects. Replace as necessary.
4. Tighten hose clamps.
5. Clean all dirt and other debris from outside of radiator.
6. Check that overflow line on tank is open.
Draining Radiator
Drain radiator system, as follows:
1. Stop engine.
2. Remove fill cap from radiator top (Figure 7-18
).
3. Open petcock bleed valves at both ends of radiator
(Figure 7-18
) — three on left end and two on right end.
4. Open drain valve (Figure 7-19
) and drain coolant into a
suitable container.
5. Close drain valve once system is completely drained.
Filling Radiator
NOTE: See engine manufacturer’s manual for antifreeze
and coolant additive recommendations.
1. Make sure petcocks are open at both ends of radiator.
2. Fill cooling system through radiator fill cap to FULL
(COLD) LEVEL mark on sight gauge. Coolant system
capacity is approximately 35-1/2 gallons (134 liters).
3. Close petcocks on each end of radiator once clear
coolant appears.
4. Add coolant to FULL (COLD) LEVEL mark.
5. Vent cab heater core at valve under operator’s cab
(Figure 7-23
).
6. Install fill cap and run engine at high idle until engine is
hot — between 180°F (82°C) and 195°F (91°C).
7. Look for coolant leaks while engine is running; correct if
found.
8. Stop engine, wait until engine is cool, and refill radiator
to proper level.
FIGURE 7-17
P1901
Fill
Cap
Overflow
Line
Radiator
At Right Rear of Radiator
Coolant Level
Gauge
Vent
Line
FIGURE 7-18
P1901
Bleed Valve
(5 places under covers)
Access
Cover
Typical Both Ends of Radiator
FIGURE 7-19
P1902
Drain
Valve
View Under Rear of Engine
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