420E, 430E, 432E, 434E, 442E, AND 444E BACKHOE LOADERS
SAFETY.CAT.COM 420E, 430E, 432E, 434E,442E, AND 444EBACKHOE LOADERSMaintenance IntervalsExcerpted from Operation & Maintenance Manual (SEBU7687-08) 2009 CaterpillarAll Rights Reserved
SEBU7687-08143Maintenance SectionMaintenance Interval Schedulei03740480Maintenance Interval ScheduleSMCS Code: 7000Ensure that all safety information, warnings andinstructions are read and understood before anyoperation or any maintenance procedures areperformed.The user is responsible for the performance ofmaintenance, including all adjustments, the use ofproper lubricants, fluids, filters, and the replacementof components due to normal wear and aging. Failureto adhere to proper maintenance intervals andprocedures may result in diminished performance ofthe product and/or accelerated wear of components.Use mileage, fuel consumption, service hours, orcalendar time, WHICH EVER OCCURS FIRST,in order to determine the maintenance intervals.Products that operate in severe operating conditionsmay require more frequent maintenance.Note: Before each consecutive interval is performed,all maintenance from the previous interval must beperformed.Note: If Cat HYDO Advanced 10 hydraulic oil isused, the hydraulic oil change interval will change.The normal interval of 2000 hours is extended to3000 hours. S·O·S services may extend the oilchange even longer. Consult your Caterpillar dealerfor details.When RequiredBattery - Recycle .Battery or Battery Cable - Inspect/Replace .Bucket Cutting Edges - Inspect/Replace .Bucket Tips - Inspect/Replace .Cab Interior - Clean .Engine Air Filter Primary Element - Clean/Replace .Engine Air Filter Secondary Element - Replace .Engine Air Precleaner - Clean .Engine Compartment - Clean .Fuses - Replace .Oil Filter - Inspect .Radiator Core - Clean .Window Washer Reservoir - Fill .Window Wipers - Inspect/Replace .Windows - Clean .Engine Air Filter Service Indicator - Inspect . 160Engine Oil Level - Check . 161Fuel System Water Separator - Drain . 171Hydraulic System Oil Level - Check . 176Loader Bucket, Cylinder, and Linkage Bearings Lubricate . 176Seat Belt - Inspect . 181Stabilizer - Clean/Inspect . 182Stabilizer and Cylinder Bearings - Lubricate . 183Swing Frame and Cylinder Bearings - Lubricate . 183Tire Inflation - Check . 183Transmission Oil Level - Check . 186Wheel Nut Torque - Check . 188Every 50 Service Hours or WeeklyCab Filter (Fresh Air) - Clean/Inspect/Replace .Cab Filter (Recirculation) - Clean/Inspect/Replace .Fuel Tank Water and Sediment - Drain .Parking Brake - Check/Adjust .150151171178Every 250 Service HoursEngine Oil Sample - Obtain . 162Every 250 Service Hours or MonthlyAxle Breathers - Clean/Replace .Belts - Inspect/Adjust/Replace .Differential Oil Level (Front) - Check .Differential Oil Level (Rear) - Check .Extendable Stick Pads - Inspect/Adjust .Final Drive Oil Level (Front) - Check .Final Drive Oil Level (Rear) - Check .Power Sideshift Stabilizer Wear Pads - Inspect .Sideshift Stabilizer Wear Pads - Inspect/Adjust .145147156156163168169179182146146148149151Initial 500 Hours (for New Systems, RefilledSystems, and Converted Systems)158159160160172178180188188188Every 500 Service Hours or 3 MonthsEvery 10 Service Hours or DailyBackhoe Boom, Stick, Bucket, and Cylinder Bearings- Lubricate . 145Backup Alarm - Test . 146Braking System - Test . 148Cooling System Coolant Level - Check . 153Cooling System Coolant Sample (Level 2) Obtain . 154Cooling System Coolant Sample (Level 1) Obtain .Differential Oil Sample (Front) - Obtain .Differential Oil Sample (Rear) - Obtain .Drive Shaft Spline - Lubricate .Engine Oil and Filter - Change .Final Drive Oil Sample (Front) - Obtain .Final Drive Oil Sample (Rear) - Obtain .Fuel System Filter and Water Separator Replace .Fuel System Secondary Filter - Replace .Hydraulic Oil Sample - Obtain .Hydraulic System Oil Filter - Replace .Transmission Oil Filter - Replace .Transmission Oil Sample - Obtain .153157157157162169169169170173175185187
144Maintenance SectionMaintenance Interval ScheduleSEBU7687-08Every 1000 Service HoursEngine Valve Lash - Check . 163Every 1000 Service Hours or 6 MonthsDifferential Oil (Front) - Change .Differential Oil (Rear) - Change .Final Drive Oil (Front) - Change .Final Drive Oil (Rear) - Change .Rollover Protective Structure (ROPS) - Inspect .Transmission Magnetic Screen - Clean .Transmission Oil - Change .Wheel Bearings (Front) - Lubricate .155156167168181184184187Every 2000 Service HoursEngine Crankcase Breather - Replace . 161Every 2000 Service Hours or 1 YearHydraulic System Oil - Change . 174Receiver Dryer (Refrigerant) - Replace . 180Every YearCooling System Coolant Sample (Level 2) Obtain . 154Every 3000 Service Hours or 2 YearsCooling System Water Temperature Regulator Clean/Replace . 155Every 3 Years After Date of Installation orEvery 5 Years After Date of ManufactureSeat Belt - Replace . 181Every 6000 Service Hours or 3 YearsCooling System Coolant Extender (ELC) - Add . 153Every 12 000 Service Hours or 6 YearsCooling System Coolant (ELC) - Change . 151
SEBU7687-08145Maintenance SectionAxle Breathers - Clean/Replacei02436158Axle Breathers - Clean/ReplaceSMCS Code: 3278-070-BRE; 3278-510-BREi02968284Backhoe Boom, Stick, Bucket,and Cylinder Bearings LubricateSMCS Code: 6501-086-BD; 6502-086-BD;6503-086-BD; 6511-086-BD; 6512-086-BD;6533-086-BD; 7562-086-BDIllustration 210g01216797The front axle breather is located on the top right side of thedifferential housing.Illustration 212g01194613Position the backhoe into the service position thatis shown above. Lower the bucket to the ground.Relieve the hydraulic pressure.Illustration 211g01216798The rear axle breather is located to the left of the differentialhousing.1. Clean the area around the breathers. Remove thebreather from the front axle.2. Wash the breather in clean nonflammable solvent.Wipe the breather dry and check the breather fordamage.3. Install the clean breather back into the axle.Replace the breather if the breather is damaged.Note: Make sure that the slot in the breather isparallel to the axle housing.Illustration 213g01194615Apply lubricant to the grease fitting (1) for the rod endof the stick cylinder.Apply lubricant to the grease fitting (2) for the headend of the boom cylinder and the head end of thestick cylinder.Apply lubricant to the grease fitting (3) for the rod endof the boom cylinder.Apply lubricant to the grease fitting (4) for the boompivot. There is one grease fitting on each side of themachine.
146Maintenance SectionBackup Alarm - TestSEBU7687-08There is a total of 21 grease fittings.i00080741Backup Alarm - TestSMCS Code: 7406Turn the engine start switch key to ON in order toperform the test.Apply the service brake. Move the transmissiondirection control lever to REVERSE position.Illustration 214g01194617The backup alarm should immediately sound.The backup alarm will continue to sound until thetransmission direction control lever is moved to theNEUTRAL position or to the FORWARD position.i00993589Battery - RecycleSMCS Code: 1401-561Always recycle a battery. Never discard a battery.Always return used batteries to one of the followinglocations:Illustration 215g01491621Apply lubricant to the grease fitting (5) for the bucketpivot pin.Apply lubricant to the grease fitting (6) for the link.Apply lubricant to the grease fitting (7) for the rod endof the bucket cylinder.Apply lubricant to the grease fitting (8) for the headend of the bucket cylinder.Apply lubricant to the grease fitting (9) for the pivotpin for the stick. A battery supplier An authorized battery collection facility Recycling facilityi01833495Battery or Battery Cable Inspect/ReplaceSMCS Code: 14011. Turn the engine start switch to the OFF position.Turn all switches to the OFF position.Apply lubricant to the grease fitting (10) for the pivotpin. There is one grease fitting on each side of themachine.2. Disconnect the negative battery cable from theframe.Apply lubricant to the grease fitting (11) for the pivotpin.Note: Do not allow the disconnected battery cable tocontact the frame of the machine.Apply lubricant to the grease fitting (12) for the headend of the thumb cylinder.3. Disconnect the negative battery cable at thebattery.Apply lubricant to the grease fitting (13) for the rodend of the thumb cylinder.4. Inspect the battery terminals and inspect thebattery cables. Keep the terminals clean and keepthe terminals coated with petroleum jelly.Apply lubricant to the grease fitting (14) for the pivotpin on each side of the thumb.
SEBU7687-08147Maintenance SectionBelts - Inspect/Adjust/Replace5. Perform the necessary repairs. Replace the cableor the battery, as needed.7. Recheck the belt deflection. If the amount ofdeflection is incorrect, repeat Step 4 to Step 6.6. Connect the negative battery cable at the battery.8. Install the engine access panel.7. Connect the battery cable to the frame of themachine.9. Remove the engine access panel on the right sideof the machine.8. Install the engine start switch key.i03316203Belts - Inspect/Adjust/ReplaceSMCS Code: 1357-025; 1357-040; 1357-510If new belts are installed, check belt adjustmentafter 30 minutes of operation. For multiple belt driveapplications, always replace the belts in matchedsets. Replacing only one belt of a matched set willcause the new belt to carry more load because theolder belts are stretched. The additional load on thenew belt could cause the new belt to break.Illustration 217g011788331. Install the lift cylinder brace. Refer to Operationand Maintenance Manual, “Lift Cylinder Brace Connect and Disconnect” for more information.10. Inspect the condition of the alternator beltsand the adjustment of the alternator belts. Thealternator belts should deflect 10 mm (0.38 inch)under 110 N (25 lb) of force.2. Remove the engine access panel on the left sideof the machine.11. Loosen the mounting bolt (3). Loosen theadjusting locknut (4).12. Move the alternator until the correct tension isreached.13. Tighten the adjusting locknut (4). Tighten themounting bolt (3).14. Recheck the belt deflection. If the amount ofdeflection is incorrect, repeat Step 11 to Step 13.15. Install the engine access panel.16. Start the engine. Raise the loader arms to themaximum height.Illustration 216g011787733. Inspect the condition of the air conditioner belt andthe adjustment of the air conditioner belt. The airconditioner belt should deflect 10 mm (0.38 inch)under 110 N (25 lb) of force.4. Loosen the adjusting locknut (1). Loosen the twocompressor bracket mounting bolts (2).5. Move the compressor until the correct belt tensionis reached.6. Tighten the adjusting locknut (1). Tighten the twocompressor bracket mounting bolts (2).17. Remove the pin and replace the brace for theloader lift arm to the stored position on the loaderlift arm.18. Lower the bucket to the ground.
148Maintenance SectionBraking System - TestSEBU7687-08i00651426Braking System - TestSMCS Code: 4251; 4267; 7000Service Brake Holding Ability TestCheck the area around the machine. Make surethat the machine is clear of personnel and clear ofobstacles.Test the brakes on a dry, level surface.Fasten the seat belt before you test the brakes.The following tests are used to determine if theservice brake is functional. These tests are notintended to measure the maximum brake holdingeffort. The brake holding effort that is required tosustain a machine at a specific engine rpm variesdepending on the machine. The variations are thedifferences in the engine setting, in the power trainefficiency, and in the brake holding ability, etc.Test the brakes on a dry, level surface.Fasten the seat belt before you test the brakes.The following tests are used to determine if theparking brake is functional. These tests are notintended to measure the maximum brake holdingeffort. The brake holding effort that is required tosustain a machine at a specific engine rpm variesdepending on the machine. The variations are thedifferences in the engine setting, in the power trainefficiency, and in the brake holding ability, etc.1. Start the engine. Raise the bucket slightly.2. Engage the parking brake.3. Move the transmission control lever to THIRDSPEED FORWARD.Note: The parking brake indicator light should comeon and the parking brake alarm should sound.4. Gradually increase the engine speed to high idle.The machine should not move.1. Start the engine. Raise the bucket slightly.2. Apply the service brake. Release the parkingbrake.3. Move the transmission control lever to THIRDSPEED FORWARD.4. Gradually increase the engine speed to high idle.The machine should not move.If the machine begins to move, reduce the enginespeed immediately and engage the parking brake.5. Reduce the engine speed to low idle. Move thetransmission to NEUTRAL. Engage the parkingbrake. Lower the bucket to the ground. Stop theengine.If the machine begins to move, reduce the enginespeed immediately and apply the service brakepedal.5. Reduce the engine speed. Move the transmissionto NEUTRAL. Lower the bucket to the ground.Stop the engine.NOTICEIf the machine moved while testing the brakes, contactyour Caterpillar dealer.Have the dealer inspect and, if necessary, repair theparking brakes before returning the machine to operation.i01920076NOTICEIf the machine moved while testing the brakes, contactyour Caterpillar dealer. Have the dealer inspect and,if necessary, repair the service brake before returningthe machine to operation.Secondary Brake Holding AbilityTestCheck the area around the machine. Make surethat the machine is clear of personnel and clear ofobstacles.Bucket Cutting Edges Inspect/ReplaceSMCS Code: 6801Personal injury or death can result from bucketfalling.Block the bucket before changing bucket cuttingedges.
SEBU7687-08149Maintenance SectionBucket Tips - Inspect/Replace1. Raise the bucket. Place a block under the bucket.2. Lower the bucket to the blocking.Check the bucket tips for wear. If the bucket tip has ahole, replace the bucket tip.Do not block up the bucket too high. Block upthe bucket so that the bucket is high enough toremove the cutting edges and the end bits.3. Remove the bolts. Remove the cutting edge andthe end bits.4. Clean the contact surfaces.5. Use the opposite side of the cutting edge, if thisside is not worn.6. Install a new cutting edge, if both edges are worn.Illustration 2197. Install the bolts. Tighten the bolts to the specifiedtorque.8. Raise the bucket. Remove the blocks.g012726711. Drive the pin out of the bucket tip from the retainerside of the bucket tip. Remove the bucket tip andthe retainer.9. Lower the bucket to the ground.10. After a few hours of operation, check the boltsfor proper torque.i02540747Bucket Tips - Inspect/ReplaceSMCS Code: 6805Personal injury or death can result from the bucketfalling.Block the bucket before changing bucket tips.Illustration 220g01272854(1) Retaining washer(2) Retainer(3) Adapter2. Clean the adapter and the pin.3. Fit retainer (2) into retaining washer (1). Installthis assembly into the groove that is in the sideof adapter (3).Illustration 218g00101352(1) This tip is usable. (2) This tip should be replaced. (3) This tiphas been overworn.
150Maintenance SectionCab Filter (Fresh Air) - Clean/Inspect/ReplaceIllustration 221g012728594. Install the new bucket tip or the rotated bucket tiponto the adapter. To allow greater penetration orless penetration, the bucket tip may be rotated by180 degrees.SEBU7687-08Illustration 222g012577281. Open the filter cover that is located on the rightfender.5. From the other side of the retainer, drive thepin through the bucket tip, the adapter, and theretainer.6. After you drive the pin, make sure that the retainerfits snugly into the pin groove.i02502577Cab Filter (Fresh Air) Clean/Inspect/ReplaceSMCS Code: 7342-040; 7342-070; 7342-510NOTICEDo not clean the elements by bumping or tappingthem.Inspect the elements after cleaning. Do not use anelement with damaged pleats, gaskets or seals.When cleaning with pressure air, use 205 kPa (30 psi)maximum to prevent element damage by too much airpressure.When cleaning with pressure water, use 280 kPa(40 psi) maximum to prevent element damage.Illustration 2232. Remove the filter element.3. Clean the filter element with compressed air orpressure water. Direct the air or the water alongthe pleats of the element. You can also washthe element with clean water and nonsudsinghousehold detergent.4. Rinse the filter element thoroughly with clearwater.5. Allow the filter element to air dry. Inspect theelement for damage. If the filter element isdamaged, replace the filter element.6. Install the filter element.Clean the filter element weekly, but clean the filterelement daily when there is a reduction of aircirculation.g012008157. Install the filter cover.
SEBU7687-08151Maintenance SectionCab Filter (Recirculation) - Clean/Inspect/Replacei02502545i02510458Cab Filter (Recirculation) Clean/Inspect/ReplaceCooling System Coolant (ELC)- ChangeSMCS Code: 7342-040; 7342-070; 7342-510SMCS Code: 1353; 1395The recirculation filter is located to the left of theoperator's seat.Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relievethe pressure.NOTICEMixing ELC with other products will reduce the effectiveness of the coolant.This could result in damage to cooling system components.Illustration 224g012518901. Remove the cover that is over the recirculationfilter. Remove the filter element.2. The filter element can be cleaned by usingcompressed air. Use a maximum air pressure of205 kPa (30 psi). Direct the air from the clean sideto the dirty side.3. Look through the filter toward a bright light. Inspectthe element for damage. Inspect the gaskets fordamage. Replace damaged filters.4. Install the filter element.Note: Clean the filters more often in dusty conditions.i01404606Cab Interior - CleanSMCS Code: 7301-0701. Use high pres
SAFETY.CAT.COM 420E, 430E, 432E, 434E, 442E, AND 444E BACKHOE LOADERS Maintenance Intervals Excerpted from Operation & Maintenance Manual (SEBU7687-08)
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(11) Provided a 420E IT Backhoe Loader, attachments, tools, engineer equipment records and forms, and references, change attachments per the TM 10996A-OR/A. (1345-HEOP-1004k) (12) Provided a 420E IT Backhoe Loader, engineer equipment records and forms, and with the aid of references, c
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