657 WHEEL TRACTOR-SCRAPER When Required Caterpillar

(53)Air Cleaners And Intake Systems

Tractor:

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Never service air cleaners with engine running.

Service air cleaners when RED band in indicator locks in visible position.

Servicing Primary Element

1. Remove covers and primary elements.

2. Clean inside of air cleaner housings.

3. Clean and inspect elements. See page 40.

4. Install clean elements and covers.

5. Reset filter indicator.

If indicator shows RED shortly after installation of clean primary element, and element has been cleaned 6 to 8 times, install new element.

If new primary element was used, and indicator shows RED, service secondary element.

Servicing Secondary Element

1. Remove covers and primary elements.

2. Remove secondary element.

3. Cover air inlet openings.

4. Clean inside of air cleaner housing.

5. Inspect precleaner tube openings for dirt.

6. If cleaning is needed, remove precleaner and clean with pressure air or wash in warm water.

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

7. Dry and install precleaner and cap.

8. Uncover air inlet openings and install new elements.

9. Install primary elements and covers.

10. Reset filter indicator.

Scraper:

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Never service air cleaner with engine running.

Service air cleaners when RED band in indicator locks in visible position.

Servicing Primary Element

1. Remove inlet pipe. Remove hood. Remove covers and primary elements.

2. Clean inside of air cleaner housing. Clean and inspect element. See page 40.

3. Install clean elements and covers.

4. Reset filter indicator.

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

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

Servicing Secondary Element

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

2. Cover air inlet openings.

3. Clean inside of air cleaner housings.

4. Inspect precleaner tube openings for dirt. Remove and clean if necessary.

5. Uncover air inlet openings and install new elements.

6. Install primary elements and covers.

7. Reset filter indicator.

8. Install hood and inlet pipe.

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 nonsudsing 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 pinholes or tears are found.

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

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When using pressure air for cleaning, wear safety glasses and protective clothing. Maximum pressure should be below 30 PSI (2 kg/cm2).

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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.

(54)Cooling Systems

Whenever draining and refilling the cooling system, always recheck the coolant level when the engine reaches normal operating temperature.

Stop engine. Remove cap slowly to relieve pressure. Maintain coolant level 1/2 inch (1 cm) below the bottom of the fill pipe.

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

Never add coolant to an overheated engine, allow engine to cool first.

Add AVSpare Corrosion Inhibitor. Follow recommendations given on container.

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

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Inhibitor contains alkali, avoid contact with skin and eyes.

NOTE: If machine is to be stored in, or shipped to an area with below freezing temperatures, refer to Item 45 on Page 31.

Cleaning the Cooling System

1. Run engines until coolant is at operating temperature. Park machine on level ground and stop engines.

2. Turn filler caps slowly to relieve pressure, then remove caps.

3. Open tractor radiator drain valve and allow coolant to drain.

4. Open scraper radiator drain valve and allow coolant to drain.

5. Close drain valves and fill systems with cleaning solution. ¹

6. Start engines and run for 1/2hour. Stop engines and drain cleaning solution.

7. Flush systems with clean water until draining water is clear.

8. Close drain valves and fill systems with neutralizing solution. ²

9. Start and run engines or 10 minutes. Stop engines and open drain valve.

10. Flush systems with clean water.

11. Close drain valves and add coolant to proper level.

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¹2 lb. Sodium Bisulphate (NaHSO₄) per 10 gal. water (25 grams per liter).

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²1/2 lb. Sodium Carbonate Crystals (Na₂CO₃· 10 H₂O) per 10 gal. water (6 grams per liter).

NOTE: Most commercial cooling system cleaners may be used.

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Use all cleaning solutions with care.

(55)Fuel Systems - Tractor

Primary Filter

Service primary element when fuel pressure gauge registers OUT with engine running.

1. Loosen nut and remove case and element.

2. Wash case and element in clean solvent.

3. Install element and case.

4. Start engine and check for leaks.

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

Final Fuel Filter

1. Remove used filters.

2. Clean filter bases. Make sure all of old seals are removed.

3. Coat seal of new filters with clean diesel fuel.

4. Install new filters by hand.

5. When seals contact bases, tighten 3/4 turn more.

6. Prime system, start engine and check for leaks.

Priming Fuel System

1. Move accelerator to off position and open vent valves.

2. Unlock priming pump plunger and operate pump.

3. When fuel flows free of air bubbles, lock plunger and close vent valve.

Scraper

Primary Filter

Service primary element when fuel pressure gauge registers OUT with engine running.

1. Loosen nut and remove case and element.

2. Wash case and element in clean solvent.

3. Install element and case.

4. Start engine and check for leaks.

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

Final Fuel Filter

1. Remove used filters.

2. Clean filter bases. Make sure all of old seals are removed.

3. Coat seal of new filters with clean diesel fuel.

4. Install new filters by hand.

5. When seals contact bases, tighten 3/4 turn more.

6. Prime system, start engine and check for leaks.

Priming Fuel System

1. Move governor control to OFF position.

2. Open vent valve. Unlock priming pump plunger and operate pump.

3. When fuel flows free of air bubbles, lock plunger and close vent valve.

Fuel Tank Caps - (Tractor and Scraper)

1. Remove tractor fuel tank cap.

2. Remove scraper fuel tank cap.

3. Disassemble caps and wash in clean solvent.

4. Reassemble caps and oil elements lightly.

5. Install caps.

(56)Transmissions

Machine level, scraper lowered, parking brakes set, transmission oil warm and engine running at low idle.

Tractor:

Maintain oil level between ADD and FULL mark on dipstick.

Scraper:

Maintain oil level between ADD and FULL mark on dipstick.

(57)Ejector Guide Rollers

1. To adjust loosen roller shaft clamp bolt.

2. Rotate shaft to position roller.

3. Rollers are properly adjusted when ejector operates freely without dragging or binding.

4. Tighten shaft clamp bolt.

(58)Ejector Carrier Rollers

1. To adjust, loosen roller shaft clamp bolt.

2. Rotate shaft to position roller.

3. Rollers are properly adjusted when ejector operates freely without dragging or binding.

4. Tighten shaft clamp bolt.

(59)Differential And Final Drives

Operate machine on level for a few minutes. Stop machine, lower scraper and set parking brake.

Tractor Differential:

Maintain lubricant level between ADD and FULL marks on dipstick.

Scraper Differential:

Maintain lubricant level between ADD and FULL marks on dipstick.

NOTE: If level is above FULL mark do not drain. Operate machine on level to permit lubricant level to equalize between differential and final drives. Recheck level.

Final Drives:

1. Position wheels so drain plugs are at bottom.

2. Maintain lubricant level to bottom of fill plug opening.

(60)Cutting Edges

Earlier Machines:

Later Machines:

1. Block bowl and apron before changing cutting edges or routing bits.

With two edges to each section, double wear can be obtained from each edge by rotating. Remove bolts and rotate 180°. Install bolts.

By exchanging sides, the end sections can be used four times. Remove bolts and exchange sides. Rotate 180° when necessary. Install bolts.

(61)Routing Bits

With two edges to each bit, double wear can be obtained from each bit. Remove bolts and install on opposite side. Install bolts.

NOTE: After removing cutting edges or routing bits, clean contact surfaces. Tighten bolts to torque values given on chart for ground engaging tools on page 50.

(62)Hydraulic Cylinder - Bail Cylinder Only

1. Lower bail. Remove bolts and slide flange away from shims.

2. Cut and remove 1 shim.

3. Install flange and bolts.

4. Test cylinder for leaks.

5. If leakage still exists, remove one more shim. (DO NOT remove more than 2 shims.)

6. Install flange and bolts. Test for leaks.

7. If leakage still occurs, see your AVSpare dealer.

(63)Cushion Hitch Accumulator

Check accumulator nitrogen precharge pressure when ride becomes stiff and cushion hitch cylinder has no movement. See your AVSpare dealer for checking procedures and pressure.

(64)Scraper Starter Pinion Housing

Remove fill plug. Maintain oil level to plug opening. Clean and install plug.