824 & 834 WHEEL TRACTORS When Required Caterpillar

(36)Engine Air Intake System

Service filter elements when indicator shows RED.

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Never service air cleaner with engine running.

Servicing Primary Element

1. Remove air cleaner filter housing covers.

2. Remove primary elements.

3. Clean inside of air cleaner housing. Clean covers.

4. Clean and inspect elements. See page 29.

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NOTICE
Always inspect primary element before and after cleaning with a light bulb inside the element. Discard if any tears, rips or damage is evident.

5. Install clean elements and covers.

If indicator shows RED shortly after installation of a primary element which has been cleaned approximately 6 times, change to another clean element.

NOTE: The primary element should be replaced after being cleaned a maximum of 6 times. Replace the element once a year even though it has not been cleaned 6 times.

If indicator still shows RED shortly after the installation of the clean primary element, change the secondary element.

Replace the secondary element at the time the primary element is cleaned for the fourth time.

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NOTICE
Always replace the secondary element. Do not attempt to reuse by cleaning.

Servicing Secondary Element

1. Remove covers and primary elements.

2. Remove and discard secondary elements.

3. Cover inlet openings.

4. Clean inside of air cleaner housing.

5. Uncover air inlet openings. Install new secondary elements. Tighten nuts to 20 ± 5 lb. ft. (2,8 ± 0,7 mkg).

6. Install clean primary elements. Install clean covers.

Cleaning Air Cleaner Elements

Pressure Air - 30 PSI (2 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. 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, air dry thoroughly and check.

Detergent

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

2. Rinse with clean water, 40 PSI maximum (3 kg/cm²), see above.

3. Air dry thoroughly and check.

Checking Element

1. Insert light inside clean and dry element and check. Discard element if tears or rips are found.

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

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When using pressure air, wear safety face shield and protective clothing. Use 30 PSI (2 kg/cm2) maximum pressure air for cleaning purposes.

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NOTICE
Do not clean elements by bumping or tapping. Do not use elements with damaged pleats, gaskets or seals.

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

(37)Fuel System

Primary Fuel Filter

Service when fuel pressure gauge registers OUT with engine running.

1. Close fuel supply valve.

2. Loosen nut and remove case and element.

3. Wash case and element in clean solvent.

4. Insert element in case. Install case and element.

5. Open fuel supply valve.

6. Start engine and check for leaks.

NOTE: Change final fuel filters if fuel pressure gauge still registers OUT with engine running.

Primary fuel filter location on earlier machines.

Final Fuel Filters

1. Close fuel supply valve and remove filters.

2. Clean gasket surfaces of filter bases.

3. Lubricate gaskets of new filters with diesel fuel.

4. Install new filters. Tighten until gasket surface contacts base. Tighten additional 1/2 to 3/4turn more.

5. Open fuel supply valve and prime fuel system. See page 31.

6. Start engine and check for leaks.

Priming Fuel System

1. Open system vent valve.

Vent valve location on earlier machines.

2. Unlock priming pump plunger and operate pump.

3. Stop when fuel flow is free of bubbles.

4. Lock priming pump plunger and close vent valve.

(38)Fuel Tank

1. Open fuel tank drain valve. Allow moisture and sediment to drain. Close valve.

2. Remove filler cap. Remove ring and screen.

3. Disassemble cap and wash cap, element and screen in clean solvent.

4. Install clean filler screen.

5. Lightly oil element. Assemble and install filler cap.

(39)Brake Accumulator

To check accumulator nitrogen precharge pressure see item (33) on page 23.

(40)Transmission

Oil warm, machine level and engine running. Maintain oil level at FULL mark.

(41)Front And Rear Differentials And Final Drives

1. Operate machine on level ground for a few minutes.

2. Lower equipment, stop engine and set parking brake.

3. On 824 Tractors, position each wheel with the fill plug horizontal to the axle.

On 834 Tractors, position each wheel with the drain plug down.

4. Maintain lubricant level to bottom of fill plug openings.

(42)Cutting Edge And End Bits

1. Lower dozer arms on blocks.

2. Stop engine.

3. Move hydraulic controls to help relieve pressure.

4. Remove cutting edge bolts and remove cutting edge.

5. Reverse or replace cutting edge.

6. End bits are not reversible. Replace if necessary.

7. Replace skid plate on C blade if necessary. Remove rear cover to gain access to bolts.

(43)Ripper 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 (left) or runner (right) position.

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

(44)Cooling System

Cleaning the Cooling System

NOTE: If machine is to be stored or shipped to an area with below freezing temperatures, and for information concerning draining the cooling system, refer to item (35) on page 26.

1. Drain coolant as outlined in item (35).

2. Close radiator drain valve and install all drain plugs. Fill system with cleaning solution. ⁽¹⁾

3. Start engine and run for 1/2 hour. Stop engine and drain cleaning solution (see item (35)).

4. Flush system with clean water until draining water is clean. Do not run engine while flushing.

5. Close radiator drain valve and install all drain plugs. Fill system with neutralizing solution. ⁽²⁾

6. Start and run engine for 10 minutes. Stop engine and drain system (see item (35)).

7. Flush system with clean water until draining water is clear. Do not run engine while flushing.

8. Close radiator drain valve and install all drain plugs. Add coolant slowly, 5 U.S. gallons (3.8 litres) per minute or less, to proper level.

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⁽¹⁾2 lb. Sodium Bisulphate (NaHSO₄) per 10 gallons water (25 grams per litre).

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⁽²⁾1/2 lb. Sodium Carbonate Crystals (Na₂CO₃ · 10 H₂O) per 10 gallons water (6 grams per litre).

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Use all cleaning solutions with care.

NOTE: Most commercial cooling system cleaners may be used.