980 WHEEL LOADER When Required Caterpillar

(36)Engine Air Intake System

Service air cleaner elements if RED band in indicator is locked up. Stop engine. ¹

Servicing Primary Elements

1. Remove covers. Remove elements.

2. Clean inside of air cleaner bodies. Clean covers.

3. Clean and inspect elements. (See page 23). Install clean elements.

4. Install covers. Reset indicator.

If indicator shows RED shortly after installation of clean primary elements and elements have been cleaned 6 to 8 times, change elements.

If new primary elements were used, and indicator shows RED, service secondary elements.

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¹Never service air cleaner elements while engine is running.

Servicing Secondary Elements

1. Remove covers and primary elements. Remove secondary elements.

2. Cover air inlet openings.

3. Clean and inspect elements. Use new gaskets. Uncover air inlets.

4. Install secondary elements. Tighten nuts to 20 ± 5 lb. ft. (2,8 ± 0,7 mkg).

5. Install primary elements and covers.

If indicator shows RED shortly after cleaning, change secondary elements.

Cleaning Air Cleaner Elements

Pressure Air - 100 PSI (7 kg/cm²) Maximum

1. Direct air inside element along length of pleats.

2. Direct air outside along length of pleats. Direct air inside along length of pleats.

3. Check element.

Water - 40 PSI (3 kg/cm²) Maximum

1. Direct water inside element along length of pleats.

2. Direct water outside along length of pleats. Rinse element.

3. Air dry thoroughly. Check element.

Detergent

1. Wash in warm water and non-sudsing household detergent.

2. Rinse with clean water (40 psi max. 3 kg/cm²). See above.

3. Air dry thoroughly. Check element.

Checking Element

1. Insert light inside clean and dry element. Check and discard element if pinholes or tears are found.

2. Wrap and store good elements in a clean dry place.

Do not clean elements by bumping or tapping.

Have spare elements on hand to use while cleaning used elements.

Do not use elements with damaged pleats, gaskets or seals.

(37)Fuel System

Service When Fuel Pressure Gauge Registers OUT with Engine Running.

1. Remove bowl and element.

2. Wash element and bowl in clean kerosene.

3. Install element and bowl.

4. Start engine and check for leaks.

If fuel pressure gauge still registers OUT, change final fuel filter.

Final Fuel Filter

1. Remove filter.

2. Clean filter base gasket surface. Lubricate new filter gasket with clean diesel fuel.

3. Install new filter. Tighten filter until gasket surface contacts base, then tighten additional 1/2turn.

4. Prime fuel system.

5. Start engine and check for leaks.

Priming Fuel System

1. Move governor control to off position. Open vent valve.

2. Unlock priming pump plunger and operate pump until ...

3. Flow of fuel from drain line is free of air bubbles. Lock pump plunger and close vent valve.

(38)Cooling System

Use clean water that is low in scale forming minerals - not softened water.

Add AVSpare Rust Inhibitor to coolant except when using permanent type antifreeze containing rust inhibitors.

Never add coolant to an overheated engine. Allow it to cool first.

Whenever draining and refilling the cooling system, always recheck the coolant level after the engine reaches normal operating temperature. Maintain coolant level 1/2 inch below bottom of fill pipe.

Check specific gravity of antifreeze solution frequently in cold weather to assure adequate protection.

Cleaning Cooling System

1. Run engine long enough to warm coolant. Loosen filler cap to relieve pressure.

2. Remove filler cap. Open valve and allow coolant to drain.

3. Close drain valve and fill system with cleaning solution. ⁽¹⁾

4. Start engine and operate for 1/2 hour.

5. Stop engine and open valve. Flush system with clean water until draining water is clear.

6. Close drain valve and fill system with neutralizing solution. ⁽²⁾

7. Start engine and operate for 10 minutes.

8. Stop engine, open drain valve and flush system.

9. Close drain valve and add coolant to proper level.

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⁽¹⁾2 lb. Sodium Bisulphate (NaHSO₄) per 10 gal. water. (Mix 25 grams per 1 liter of water).

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⁽²⁾1/2 lb. Sodium Carbonate Crystals (Na₂CO₃, 10 H₂O) per 10 gal. water. (Mix 6 grams per 1 liter of water).

NOTE: Most commercial cooling system cleaners may be used.

(39)Bucket Teeth - Replace Tip

1. Drive pin out.

2. Slide tip off.

3. Check plug. Metal part of plug must be toward pin hole.

4. Install tip in either digger or runner position.

5. Slide tip over adapter to align pin holes and install pin.

(40)Ripper Tip - Replace

1. Drive pin out.

2. Slide tip off

3. Check plug. Metal part of plug must be toward pin hole.

4. Install tip in either digger (left) or runner (right) position.

5. Slide tip over shank to align pin holes and install pin.