Caterpillar 279C Repair Manual, MBT00001-UP (Incl. Wiring)

$89.95 USD · one-time payment

Model: 279C
Type: Compact Track Loader
Serial: MBT00001-UP
2886 Pages·38 MB·Searchable PDF·English·Print-Ready
  • ✓ Wiring Diagrams
  • ✓ Hydraulic Schematics
  • ✓ Torque Specs
  • ✓ Multi-Level Bookmarks (3-level navigation)
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Caterpillar 279C machine ECM J1 connector schematic with numbered pins and wire identifiers
Caterpillar 279C Repair Manual, MBT00001-UP (Incl. Wiring)
$89.95

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This is the factory Caterpillar service set for the 279C Compact Track Loader, serial prefix MBT00001-UP, with the 3044C engine. You get two downloads: the 2886-page repair book and a separate schematics zip for chasing wires and hydraulic lines. Inside the book: full disassembly and assembly for the hydrostatic piston pumps and motors, the work tool piston pump, tilt and lift cylinders, the 3044C top to bottom (head, pistons, crank, injection pump), plus undercarriage work - idlers, recoil springs, rollers, tracks. Testing and adjusting sections give real numbers: main relief at 23000 kPa, lift pressure at 24500 kPa, charge pressure specs, flow tests. Torque charts, ECM troubleshooting, and the cab air conditioning system are all in here too.

What's Inside This Repair Manual

SystemPagesKey Topics
Air Inlet and Exhaust System1-47Turbocharger, Exhaust Manifold, Air Cleaner, Inlet Manifold, Muffler, Exhaust Temperature
Basic Engine48-372Cylinder Head, Pistons and Connecting Rods, Crankshaft, Balancer, Rocker Shaft, Connecting Rod Bearings, Bearing Clearance, Flywheel
Cooling System373-471Water Pump, Water Temperature Regulator, Engine Oil Cooler, Radiator and Hydraulic Oil Cooler, Gear Motor (Fan, Demand)
Electrical and Starting System472-952Electronic Control Module (ECM), Alternator, Glow Plugs, Electric Starting Motor, Wiring Harness (Open Circuit), Wiring Harness (Short Circuit), Electrical Connector
Engine Arrangement953-1019Engine Design, Engine Performance, Testing and Adjusting Procedures
Frame and Body1020-1033Machine Frame and Mounting, Engine Enclosure, Lift Arm Cylinder and Mounting
Fuel System1034-1142Fuel Injection Pump, Fuel Injector, Fuel Injection Nozzle, Fuel Injection Lines, Fuel Priming Pump and Primary Filter (Water Separator), Governor Control, Air in Fuel
Hydraulic System: Systems Operation, Testing and Adjusting1143-1365Work Tool Hydraulic System, Control Valve (Work Tool), Piston Pump (Work Tool), Gear Pump, Electrohydraulic System, Gear Motor (Fan), Operational Checks, Visual Inspection
Hydraulic System: Troubleshooting, Specifications, Disassembly and Assembly1366-1786Piston Pump, Gear Pump (Charge), Tilt Cylinder, Control Manifold (Quick Coupler), Control Manifold and Solenoid (Work Tool Positioner), Accumulator Manifold, System Pressure
Implements1787-1805Lift Arms, Bearings and Mounting
Lubrication System1806-1850Engine Oil Pump, Engine Oil Relief Valve, Engine Oil Bypass Valve, Crankcase Breather, Engine Crankcase Pressure (Blowby), Excessive Engine Oil Consumption
Machine Arrangement1851-1868Service Intervals, Symptom Troubleshooting, Heating and Air Conditioning Service Publications
Operator Station1869-2390Electrohydraulic Control (Joystick), Air Conditioner and Heater, Refrigerant Compressor, Refrigerant Condenser, Refrigerant Receiver-Dryer, Refrigerant Expansion Valve
Power Train2391-2725Piston Pump (Hydrostatic), Piston Motor (Hydrostatic), Hydrostatic System Troubleshooting, Pump Mounting, System Pressure, Operational Checks
Service Equipment and Supplies2726-2742Required Tools, Manifold Gauge Set (Refrigerant), Cab Pressurization and Filtration System, Fuel Priming Pump and Primary Filter (Water Separator)
Torque Specifications2743-2792Metric (ISO) Fasteners, English (SAE) Fasteners, Ground Engaging Tool (G.E.T.) Fasteners, Straight Thread O-Ring Fittings, Hose Clamps, Bulkhead Nuts
Undercarriage2793-2877Idler, Recoil Spring and Track Adjuster, Track Roller, Sprocket, Axle (Front), Axle (Rear), Track
Work Tools2878-2886Bucket, Work Tool Mounting, Quick Coupler

Quick Reference Specifications

SpecificationValuePage
Main relief valve - all standard flow models23000 ± 700 kPa (3335 ± 102 psi)p. 1288
Main relief valve - High Flow XPS models23000 ± 1000 kPa (3335 ± 145 psi)p. 1288
Lift pressure24500 ± 700 kPa (3553 ± 102 psi)p. 1299
Rack back pressure27600 ± 700 kPa (4003 ± 102 psi)p. 1300
Tilt pressure24500 ± 700 kPa (3553 ± 102 psi)p. 1300
Auxiliary pressure - High Flow XPS31000 ± 700 kPa (4496 ± 102 psi)p. 1300
Pilot accumulator precharge900 ± 100 kPa (130 ± 15 psi)p. 1303
Pilot pressure3500 ± 200 kPa (500 ± 30 psi)p. 1307
Charge pressure at low idle2750 ± 200 kPa (400 ± 30 psi)p. 1352
Charge pressure at high idle3300 ± 200 kPa (480 ± 30 psi)p. 1352
Hydrostatic pump pressure at ports MB and MC38300 ± 2000 kPa (5555 ± 290 psi)p. 1352
High pressure cutoff28000 + 1500 - 0 kPa (4060 + 218 - 0 psi)p. 1348
Standby pressure2900 ± 300 kPa (420 ± 44 psi)p. 1341
Load sensing pressure20600 ± 700 kPa (3000 ± 100 psi)p. 1344
Charge pump minimum flow36.8 L/min (9.72 US gpm)p. 1327
Work tool pump minimum flow54.3 L/min (14.34 US gpm)p. 1333
High Flow XPS auxiliary circuit flow121 ± 5 L/min (32 ± 1.3 US gpm)p. 1335
Lift cylinder raise speed3.1 ± 0.5 secp. 1351
Lift cylinder maximum drift, 1829 mm bucket in 1 min3 mmp. 1351
Engine high idle / low idle2800 ± 50 rpm / 1100 ± 50 rpmp. 1351
BrandCaterpillar
Model279C
Machine TypeCompact Track Loader
Manual TypeRepair Manual
LanguageEnglish
FormatSearchable PDF (Digital Download)
Pages2,886
File Size38 MB
Serial RangeMBT00001-UP
Wiring DiagramsYes
Hydraulic SchematicsYes
Torque SpecificationsYes
Bookmarked / IndexedYes