825, 826 & 835 COMPACTORS When Required Caterpillar

(30)Cleaner Bar Outer Support Bearing

1. Remove fill plug.

2. Maintain oil level to plug opening. Clean and install plug.

(31)Transmission

Machine must be level, parking brake applied, engine at low idle and transmission in NEUTRAL. Maintain oil level at FULL mark on the gauge.

(32)Front And Rear Differentials And Final Drives

Operate machine a few minutes before checking. Stop engine, lower blade and apply parking brake. Check on level ground.

NOTE: Rear differentials can only be checked at final drive.

1. Position final drives with fill plugs horizontal to axle.

2. Remove fill plugs slowly.

NOTE: If lubricant level is above fill plug openings, do not allow lubricant to drain to level of plug openings. Install fill plugs.

3. If lubricant level is below plug openings, add lubricant to level of plug openings.

4. Remove front differential fill plug. Maintain lubricant level to bottom of fill plug opening. Add lubricant if necessary.

5. Clean and install fill plug.

(33)Brake Accumulator

Check nitrogen precharge pressure, see Item (27) on Page 26.

(34)Air Intake System

Service filter elements when indicator shows RED.

Show/hide table

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 31.

Show/hide table

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.

Show/hide table

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 Maximum (2 kg/cm²)

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.

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 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.

Show/hide table

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

Show/hide table

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.

(35)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 in fuel pressure gauge still registers OUT with engine running.

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 3/4 turn more.

5. Open fuel supply valve and prime fuel system.

6. Start engine and check for leaks.

Priming Fuel System

1. Open system vent valve.

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.

(36)Fuel Tank

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

2. Remove filler cap.

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

4. Remove filler screen and clean.

5. Install filler screen.

6. Lightly oil element. Assemble and install cap.

(37)Cutting Edge And End Bits

1. Raise and block blade. Stop engine.

2. Remove cutting edge and/or end bits. Clean contact surfaces.

3. Reverse or replace cutting edge.

4. Replace end bits if worn. End bits are not reversible.

5. Install end bits and/or cutting edge. Tighten nuts to 565 ± 85 lb. ft. (78 ± 12 mkg).

6. Start engine, raise blade and remove blocks.

7. Retorque bolts after a few hours of operation.

(38)Tamping Tips - Early

1. Drive out retaining pin. Examine pin and use new one if damaged.

2. Clean mounting surfaces and place foot on base.

3. Drive retaining pin in place.

Later

1. Replace tips when worn down to bolt heads.

2. Loosen nuts and remove bolts and tips.

3. Clean mounting surface.

4. Install new tips.

5. Tighten nuts to 545 ± 60 lb. ft. (75 ± 8 mkg). Retorque after a few hours of operation.

(39)Cleaner Bar

Check clearance between scraper edges and wheel. Correct clearance is 1/2 inch (12 mm). When clearance reaches 1 inch (25 mm), adjust scrapers.

To Adjust:

1. Loosen nuts and slide scraper forward to proper clearance.

2. Tighten nuts to 500 ± 50 lb. ft. (69,2 ± 7 mkg).

3. Reverse or replace scraper if proper clearance cannot be reached. Remove bolts and retainer.

4. Clean mounting surfaces and install scraper, retainer, bolts and nuts loosely. Position bevel face up.

5. Slide scraper to correct clearance of 1/2 inch (12 mm).

6. Tighten nuts to 500 ± 50 lb. ft. (69,2 ± 7 mkg). Retorque nuts after a few hours of operation.

(40)Chopper Blades - Early

Replace chopper blades when required to prevent wear or damage to drum.

Later

(41)Cooling System - Cleaning

NOTE: If machine is to be stored or shipped to an area with below freezing temperatures, and for information concerning draining and filling the cooling system, refer to Item (28) on Page 27.

1. Drain coolant as outlined in Item (28).

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 (28)).

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.

6. Start and run engine for 10 minutes. Stop engine and drain system (see Item (28)).

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 per minute (3.8 litres per minute) or less, to proper level.

---

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

---

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

NOTE: Most commercial system cleaners may be used.

Show/hide table

Use all cleaning solutions with care.