Every one of the 426 pages in this Daewoo Solar 75-V shop manual PDF (OEM 023-00066AE) goes toward one goal: putting your 75-V track excavator back to factory spec. Inside: a full hydraulic schematic with standard and option circuits, a complete electrical schematic, and step-by-step rebuild procedures for the Rexroth main pump, travel motor, swing motor, cylinders, and main control valve. You also get standard torque tables, troubleshooting charts for every hydraulic component, and full track assembly and swing bearing service. Fill the hydraulic system to 150 liters (93 in the reservoir), and pull grade 8.8 M8 bolts to 21 Nm. Your excavator is down; forum guesses won't lift it. Bookmarked and text-searchable: type the spec, land on the page, start wrenching.
What's Inside This Daewoo Solar 55-V PLUS, 75-V, 75-V PLUS Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-46 | - |
| Specifications | 47-70 | Specifications for Solar 75V S0202025K |
| General Maintenance | 71-98 | General Maintenance Procedures S0302000, Standard Torques S0309000 |
| Upper Structure | 99-120 | Counterweight S0403005K, Fuel Tank S0405015K, Swing Bearing S0407000 |
| Lower Structure and Chassis | 121-150 | Track Assembly S0505075K |
| Engine and Drive Train | 151-172 | Air Conditioner S0605015 |
| Accumulator | 175-180 | General Description, Specifications, Charge Pressure, Volume, Diaphragm Operation, Serial Number Range |
| Center Joint (Swivel) | 181-188 | General Description, Troubleshooting, Disassembly, Assembly, O-Ring Replacement |
| Cylinders | 189-228 | Theory of Operation, Special Tools, Disassembly, Assembly, Piston Nut |
| Travel Motor (with Gearbox) | 229-240 | Components, Characteristics, Axial Piston Motor, Counter Relief Operation, Braking, Two Speed Transmission |
| Swing Motor | 241-246 | Motor Operation, Valve Casing, Relief Valve, Troubleshooting, Pressure Difference |
| Main Pump (Rexroth) | 247-298 | General Description, Axial Piston Pump Operation, Regulator and Flow Control, Disassembly and Assembly, Wear Limits and Adjustment, Troubleshooting |
| Control Valves (Pilot, Main, Travel) | 299-358 | Pilot Control Valve, Main Control Valve, Travel Control Valve, Disassembly, Assembly, Troubleshooting, Specifications |
| Hydraulic Schematic (Solar 75-V) | 359-366 | General Description, Standard Schematic, Option Schematic, Circuit Diagrams |
| Electrical System | 367-402 | Electrical System S0802095K, Electrical Schematic (Solar 75V) S0892096K |
| Attachments | 403-426 | Boom and Arm S0902025K, Bucket S0904000 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Standard Torques | S0309000 | p. 3 |
| Hydraulic System Capacity | 150 liters (39.6 U.S. gal) | p. 58 |
| Hydraulic Reservoir Capacity | 93 liters (24.6 U.S. gal) | p. 58 |
| Tightening torque for M8 bolts (hardness grade 8.8) | 21 Nm (16 ft lb) | p. 8 |
| Shipping Weight | 8 metric tons (17,643 lb) | p. 58 |
| Fuel Tank Capacity | 110 liters (28.5 U.S. gal) | p. 58 |
| Main Relief Pressure (normal operation) | 280 kg/cm² (3,982 psi) | p. 65 |
| Solar 75-V (S/N 1001 thru 1153) | ||
| Engine Power (S/N 1001 thru 1153) | 54 ps @ 1,900 rpm (53.26 hp) | p. 61 |
| Solar 75-V (S/N 1154 and Up) | ||
| Engine Power (S/N 1154 and Up) | 55.3 ps @ 1,900 rpm (54.5 hp) | p. 61 |
| Solar 75-V | ||
| Counterweight Weight | 860 kg (1,896 lb) | p. 103 |
| R134a Gas Weight (Air Conditioner) | 750 ±20 grams (26 ±0.7 oz) | p. 163 |
| Pilot System Charge Pressure (Accumulator) | 10 kg/cm² (142 psi) | p. 180 |
Daewoo Solar 55-V PLUS, 75-V, 75-V PLUS Common Problems This Manual Covers
Daewoo Solar 75-V pulls to one side when tracking, one travel motor slow or weak
Swap the travel hoses side to side at the center joint to isolate motor versus valve. Test circuit pressure; main relief should hold 280 kg/cm² (3,982 psi), the spec on page 65. If pressure checks good, pull the travel control valve (it weighs 7.8 kg, 17 lb) and inspect the damper spools per the procedure starting on page 299.
Manual Section: Control Valves (Pilot, Main, Travel) p. 299Boom drifts down with levers in neutral, joystick response feels spongy and delayed
Check the pilot control valve. Inspect spool return springs and seals for wear, then reassemble and torque the M14 mounting bolts to 1,240 kg•cm (90 ft lb), the spec on page 304. If drift continues, test the boom holding valve and cylinder piston seals; internal cylinder leakage shows up as steady drift under load. Cylinder service starts on page 189.
Manual Section: Control Valves (Pilot, Main, Travel) p. 299All hydraulic functions slow and weak at full throttle, oil runs hotter than normal
Verify oil level first; the reservoir holds 93 liters (24.6 U.S. gal). Install a gauge and test main relief pressure; it should hold 280 kg/cm² (3,982 psi), the spec on page 65. Low pressure on every circuit points to the Rexroth main pump, so check the DR and FR control adjustments before opening it up.
Manual Section: Main Pump (Rexroth) Control Valve Adjustment and DisassemblyHydraulic oil dripping from center of undercarriage, tracks creep slowly in neutral
Inspect the center joint for external leakage at the seal carrier, then pressure test it per the swivel procedure starting on page 181; the circuit sees full system relief of 280 kg/cm² (3,982 psi). Replace every O-ring during reassembly, never reuse them. Seal bypass inside the joint also feeds travel creep, so check neutral pressure at the travel spools.
Manual Section: Center Joint (Swivel) p. 181Coolant temperature gauge pegs hot right after cold startup, overheat warning stays on
Test the coolant temperature sensor before condemning the cooling system. Disconnect the sender and measure resistance with the engine warm; at 50°C the sensor should read above 188.2 ohms, the spec on page 385. Out of range, replace the sender. Reads correct, trace the gauge circuit against the wiring diagram on page 398 and check the panel grounds.
Manual Section: Electrical System p. 367Frequently Asked Questions
What fluids and capacities does this machine require?
The Solar 75-V excavator requires 110 liters (28.5 U.S. gal) for its fuel tank, 150 liters (39.6 U.S. gal) for the hydraulic system, and 93 liters (24.6 U.S. gal) for the hydraulic reservoir. These capacities are listed in the general specifications for the machine. p. 58
What torque specifications are listed?
The manual provides extensive torque specifications for standard metric fasteners (M4-M30, grades 8.8, 10.9, 12.9), standard U.S. fasteners (grades 1, 5, 8), Type 8 phosphate coated hardware, hose clamps, and split flanges. For example, an M8 grade 8.8 metric fastener requires 21 Nm (16 ft lb) of torque. Specific torque values for components like the Pilot Control Valve and Main Pump (Rexroth) are also detailed. p. 89
What is the recommended precharge pressure for the accumulator in the brake system?
The recommended precharge pressure for the accumulator in the brake system is 30 kg/cm² (427 psi). This specification applies to models like the Mega 200-V (Tier I & II) and Solar 140W-V/160W-V. p. 178
What is the standard clearance for steel tracks?
Steel tracks should have a standard clearance of 20 - 35 mm (0.78 - 1.38 in). This measurement is taken between the rolling surface of the track roller and the contact surface of the crawler. p. 126
What is the maximum allowable drift for the turntable during the Swing Deceleration Force Test?
During the Swing Deceleration Force Test, the maximum allowable turntable drift past the stop point should be less than 1200 mm (47-1/4"). This applies to both Power Mode and Standard Mode operations. p. 68
What format is this manual in?
Immediate download of the complete 426-page searchable Shop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this Daewoo Solar 75-V?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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