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Part of the Case Repair Manuals.
This 614-page Case CX15B, CX18B Service Manual (OEM #87743532) breaks down every hydraulic, electrical, and engine system across both mini excavator models. Inside: full wiring diagrams with harness lay-out and connection charts, hydraulic diagrams specific to the CX15B and CX18B, and a dedicated troubleshooting section covering hydraulic faults, electrical faults, and engine starting trouble. You also get pump, control valve, and slewing motor teardown procedures, plus torque tables for screws, hoses, and fittings. Tighten the 1/8-inch hydraulic line O-ring fitting to 16.7 Nm, and replace the travel motor and cylinder rod seal rings rather than reusing them, exactly as the factory calls for. No more guessing which wire goes where on a machine this small. It's bookmarked by section, so you can jump straight to the hydraulic or electrical diagrams from your phone and get back under the machine.
What's Inside This Case CX15B, CX18B Manual
| System | Pages | Key Topics |
|---|---|---|
| General & Specifications | Machine Description, Technical Specifications, Special Tools, And the Standard Maintenance Time Table | |
| Maintenance | General Maintenance and Procedures, Maintenance Standards, And Inspection Procedures | |
| Engine | Engine Removal and Installation, Disassembly, Assembly, And Inspection, And Engine Specifications | |
| Hydraulic System | Hydraulic Pump, Control Valves, Cylinders, Travel and Swing Circuits, And Hydraulic Troubleshooting and Pressure Checks | |
| Electrical System | Wiring, Sensors, Controllers, And Electrical Troubleshooting | |
| Main Components & Removal | Major Component and Main-Component Removal and Installation | |
| Working Attachment | Boom, Arm, And Bucket Working-Attachment Overview, Removal, And Installation | |
| Upper Frame & Travel System | Upper Frame and Swing, Undercarriage, Tracks, And Travel System | |
| System Troubleshooting | System-Level Troubleshooting Across the Hydraulic, Electrical, Engine, And Travel Systems |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Travel motor seal ring replacement | Replace the seal ring with a new one | p. 367 |
| Hydraulic line O-ring fitting torque (1/8 inch) | 16.7 Nm (12.31 lbf·ft) | p. 377 |
| Cylinder rod seal ring replacement | Replace the seal ring | p. 367 |
| Engine oil filter element type | Paper filter element | p. 474 |
| Engine Displacement | 952 ml (0.030 gal) | p. 32 |
| Engine Power | 11.2 kW / 2100 rpm | p. 32 |
| Tightening Torque for 1/4" Hose Fitting | 36.3 (26.77) Nm (lbf-ft) | p. 377 |
| Engine Oil Capacity | 1.8 l (0.48 U.S. gal) | p. 474 |
| Cooling System Capacity | 50 l (13.21 U.S. gal) | p. 474 |
| CX15B | ||
| Hydraulic Pump (CX15B) Working Pressure | 210 (2988) MPa (psi) | p. 139 |
| Machine Weight (Canopy) | 1480 kg (3256 lb) | p. 33 |
| CX18B | ||
| Machine Weight (Cab) | 1780 kg (3916 lb) | p. 33 |
Case CX15B, CX18B Common Problems This Manual Covers
Case CX15B travel motor malfunction under load after cold weather
Inspect the travel system on page 355. Drain the hydraulic fluid and check for air entrapment. Replace the seal ring with a new one according to page 367. Torque the 1/8 inch hydraulic line O-ring fittings to 16.7 Nm (12.31 lbf-ft) on page 377.
Manual Section: Travel System p. 355Engine overheating and excessive black smoke during heavy operation
Drain and inspect the cooling system. Refill the coolant to the 50 l (13.21 U.S. gal) capacity listed on page 474. Check the engine oil level and verify it meets the 1.8 l (0.48 U.S. gal) requirement. Inspect and replace the paper filter element.
Manual Section: Engine p. 461Visible oil leakage from hydraulic cylinders and main pump pressure low
Inspect the main hydraulic components. Check the cylinder inner diameter and verify it measures between 76.00 to 76.03 mm (2.992 to 2.9933 in) as shown on page 511. Tighten all 1/4 inch hose fittings to 36.3 (26.77) Nm (lbf-ft) according to page 377 to stop leaks.
Manual Section: System Troubleshooting p. 421Engine knocking or rotation trouble upon start with heavy vibration through the upper frame
Disassemble the main engine components following page 461. Measure the crankshaft runout limit and ensure it does not exceed 0.06 mm (0.0024 in) as specified on page 517. Replace the paper filter element and refill the engine oil to exactly 1.8 l (0.48 U.S. gal) on page 474.
Manual Section: Engine p. 461Frequently Asked Questions
What are the torque specifications for hydraulic cap screws on the CASE CX18B Series 2 mini excavator?
The manual provides general torque specifications for screws and nuts based on their nominal size and class (page 63). For specific hydraulic components, it lists torque values during installation. For example, for pump installation, screws (8) should be tightened to 85.3 Nm (62.91 lbf·ft), and screws (10) to 49 ÷ 54 Nm (36.16 ÷ 39.82 lbf·ft). p. 269
What are the replacement specifications for Hydraulic filter cartridges?
The manual specifies that the hydraulic oil tank filter (item 55) should be replaced. The standard maintenance time for this replacement is 0.1 hours. No further detailed specifications for the filter cartridge itself (e.g., part number, dimensions, material) are provided. p. 78
What are the replacement specifications for Travel motor seals?
The manual lists "Seal ring" as a component of the travel motor (items 14, 19, 20 on page 385). However, it explicitly states that "THE DOCUMENTATION REGARDING DISASSEMBLY AND ASSEMBLY PROCEDURES IS MISSING" for the travel motor, so detailed replacement specifications for the seals are not available. p. 385
What is the engine oil capacity for the CASE CX15B/CX18B mini excavator?
The engine oil capacity for the CASE CX15B/CX18B mini excavator is 1.8 liters (0.48 U.S. gallons). This is specified in the technical specifications for the engine's lubrication system. p. 473
How will I receive this Case CX15B, CX18B Service Manual?
Instant PDF download. You get the full 614-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this Case CX15B, CX18B manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Are there hydraulic schematics in this Case CX15B, CX18B manual?
Yes, this Case CX15B, CX18B Service Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
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