First thing to know: this is Caterpillar's own family publication, titled D3C, D4C and D5C Series III Hystat Track-Type Tractors, so it covers all three machines, serial prefixes 5HS00001-Up, 7PS00001-Up and 6CS00001-Up. It is a compiled SIS service set built from the real Cat modules: Specifications SENR1249/SENR1252, Systems Operation SENR1250/SENR1253, Testing and Adjusting SENR1257, Disassembly and Assembly SENR1251/SENR1255, plus the 3046 engine supplement SENR1248. You get the full hydrostatic drive coverage a Hystat owner actually needs: charge pressure targets, relief valve tests, speed sensing and underspeed valve adjustment, along with the 3046 engine, Nippondenso fuel system, implement hydraulics, undercarriage and the Hystat hydraulic and electrical schematics.
What's Inside This Caterpillar D3C, D4C, D5C Series III Repair Manual
| System | Pages | Key Topics |
|---|
| Air Inlet and Exhaust System | 2-47 | Turbocharger, Inlet and Exhaust Manifolds, Air Cleaner |
| Basic Engine | 48-373 | Cat 3046 Engine, Cylinder Head, Crankshaft, Pistons, Flywheel |
| Cooling System | 374-433 | Water Pump, Thermostat, Radiator |
| Electrical and Starting System | 434-1353 | Denso Alternators, Starting System, Batteries, Product Link, EquipmentManager, Air Conditioning R134a |
| Engine Arrangement | 1354-1427 | Engine Mounting and Arrangement |
| Frame and Body | 1428-1449 | Frame, Body Panels |
| Fuel System | 1450-1721 | Nippondenso Fuel System, Injection Pump, Injectors, Priming |
| Hydraulic System | 1722-2016 | Implement Hydraulics, Pumps, Valves, Cylinders, Testing and Adjusting |
| Implements | 2017-2037 | Blade and Implement Linkage |
| Lubrication System | 2038-2085 | Engine Oil Pump, Oil Filter |
| Machine Arrangement | 2086-2117 | Machine Arrangement and Layout |
| Operator Station | 2118-2513 | Cab, Controls, Seat, Air Conditioning |
| Power Train | 2514-2912 | Hydrostatic Drive, Charge Pressure Relief, Crossover Relief, Pressure Override Relief, Speed Sensing Valve, Underspeed and Overspeed Valves, Hydrostatic System Test and Adjust, Parking Brake |
| Schematic | 2913-2946 | Hystat Hydraulic Schematic, Electrical Schematic, Graphic Symbol Legends |
| Service Equipment and Supplies | 2947-3018 | Service Tooling and Supplies |
| Steering and Braking System | 3019-3023 | Steering and Brake Controls |
| Torque Specifications | 3024-3072 | Metric ISO Fasteners, English SAE Fasteners, Fittings, Plugs, Hose Clamps |
| Undercarriage | 3073-3222 | Track, Idlers, Rollers, Track Tension |
| Work Tools | 3223-3240 | Work Tool Mounting |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Charge pressure startup target | 2650 +/- 225 kPa (385 +/- 35 psi) | |
| Minimum charge pressure before engine start | 1500 kPa (220 psi) | |
| Charge circuit maximum fill pressure | 4000 kPa (580 psi) | |
| Parking brake release pressure threshold | 200 kPa (30 psi) | |
| Hydraulic system capacity | 58.6 litres (15.5 US gal) | |
| Hydraulic oil type | 10W | |
| Hydraulic oil test temperature | 40 to 55 C (104 to 131 F) | |
| Hydraulic oil temperature limit | 99 C (210 F) | |
| Charge pump filter fill volume | 7.6 to 11 litres (2.0 US gal) | |
| Speed and direction lever hold time | 90 +/- 30 seconds | |
| Cover bolt torque | 55 +/- 10 N m (40 +/- 10 lb ft) | |
| Footrest and guard bolt torque | 100 +/- 20 N m (75 +/- 15 lb ft) | |
| Oil filter part number | 102-2828 | |
| Engine fitted | Caterpillar 3046 with Nippondenso fuel system | |
