Wrenching on a Kobelco SK16 or SK17? This 600-page Kobelco SK16, SK17 Shop Manual PDF covers both hydraulic excavators front to back, from crawler frame to a full engine service section. Inside you get hydraulic circuit diagrams for the control valve, pilot valves, slewing and travel motors, plus wiring diagrams for the whole electrical system and a dedicated troubleshooting section. Page after page of disassembly and assembly procedures walk you through the cylinders, upper frame, and swivel joint. Torque the 1/4-inch flare-type hydraulic hoses to 3.0 ± 0.5 kg·m and the travel pilot valve to 3.0 ± 0.2 kgf·m before you crack a single fitting. No more chasing hydraulic faults on guesswork. This bookmarked PDF opens on any device; grab your tablet, walk out to the machine, and start wrenching.
What's Inside This Kobelco SK16, SK17 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Precautions for Repairs | 9-11 | Preparation Before Disassembling |
| Escaping Procedure in Case of Emergency | 12 | When Cab Door Does Not Open |
| International Unit Conversion System | 13-16 | Derived Units Bearing Peculiar Designations |
| Components Name | 17 | - |
| Machine Dimensions | 18-19 | - |
| Specifications and Performance | 20 | Speed and Gradeability |
| Machine & Components Weight (Dry) | 21 | - |
| Transportation Dimensions and Weight | 22 | Loading Machine on a Trailer |
| Buckets (Not Specified) | 23 | - |
| Crawler Shoes | 24 | - |
| The Machine Lifting Procedures | 25 | - |
| Attachment Working Ranges | 26-27 | - |
| Lifting Capacities | 28-32 | - |
| Engine Specifications and Performance | 33-34 | Engine Model, Rated Output, Torque, Fuel Consumption, Valve Clearance |
| Attachment Dimensions and Maintenance Standards | 35-50 | Boom Dimensions, Arm Maintenance, Bucket Specifications, Dozer Blade, Swing Bracket |
| Tools and Torque Specifications | 51-58 | Torque Specifications, Capscrews, Nuts, Special Spanners, Screw Locking Compounds |
| Standard Maintenance Time Table | 59-66 | Maintenance Time Estimation, Attachment Maintenance, Upper Slewing Structure, Travel System |
| Maintenance Standards and Test Procedures | 67-82 | Engine Speed Measurement, Hydraulic Oil Pressure, Travel Performance, Slew Performance, Crawler Tension |
| Hydraulic System Operation and Components | 83-199 | Hydraulic Circuit Diagrams, Control Valve, Pilot Valve, Slewing Motor, Travel Motor, Electrical System |
| Whole Disassembly and Assembly | 200-341 | Disassembly Procedures, Assembly Procedures, Cylinder Maintenance, Upper Frame, Swivel Joint |
| Travel System | 342-393 | Crawler, Slide Plate, Lower Roller, Front Idler, Idler Adjuster, Sprocket, Travel Motor, Slewing Bearing, Adjustable Crawler Frame Width (SK17) |
| Troubleshooting | 394-423 | Incapable of Travel Operation, Traction Force Fault, Hydraulic Circuit Diagnosis, Electrical Troubleshooting |
| Engine Service Manual (Yanmar 3TNE74, Attached in Full) | 424-600 | Engine Specifications and Performance, Fuel System, Lubrication, Cooling, Disassembly and Reassembly, Maintenance Standards |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for hydraulic hose (30° flare type) 1/8 | 1.5 ± 0.2 kg·m | p. 54 |
| Tightening torque for hydraulic hose (30° flare type) 1/4 | 3.0 ± 0.5 kg·m | p. 54 |
| Tightening torque for Pilot Valve (Attachment) | 4.2 ± 0.3 kgf m | p. 135 |
| Tightening torque for Pilot Valve (Travel) | 3.0 ± 0.2 kgf m | p. 138 |
| Shaft idle turning torque | 0.6 ~ 1.2 kgf·m (4.3 ~ 8.7 lbf·ft) | p. 277 |
| Tightening torque for lower roller capscrews | 11.7 kgf·m | p. 351 |
| Tightening torque for slewing bearing capscrews | 11.7 kgf·m (85 lbf·ft) | p. 366 |
| Travel motor fixing socket bolt M10 tightening torque | 5.6 kgf·m (41 lbf·ft) | p. 365 |
| Travel motor reduction gear oil volume | 330 cc (20 cu·in) | p. 365 |
| Slewing Speed | 9.0 rpm | p. 20 |
| Engine Output Rating | 15 PS / 2,000 rpm | p. 20 |
| Hydraulic Oil Capacity | 22 liters | p. 21 |
Kobelco SK16, SK17 Common Problems This Manual Covers
Kobelco SK16 pulls to one side, left track weak or slow during straight travel
Check pilot pressure to both travel spools first, then swap the travel lines at the swivel joint to isolate the weak side. Test main relief pressure against the 210+5 kgf/cm2 (2990+71 psi) setting shown on page 143. If the fault follows the swivel joint, replace its seals using the disassembly procedures starting.
Manual Section: Hydraulic System Troubleshooting p. 143Hydraulic oil weeping at hose fittings near the swivel joint and pump area
Wipe the fittings dry, run the machine, and find the exact weep point. Retorque 30 degree flare fittings to the chart values on page 54: a 1/4 hose takes 3.0 plus or minus 0.5 kg·m. Replace any hose with abrasion through the outer cover; never chase a leak by overtightening past the chart.
Manual Section: Tools and Torque Specifications p. 54Bucket and boom slow or jerky, attachment barely moves at full throttle
Verify high idle reaches 2,150 ± 50 rpm under load before condemning the pump (performance inspection standard, page 70). Check pilot valve output next, then confirm main relief pressure holds the 210+5 kgf/cm2 setting listed on page 143. If relief pressures check good, follow the pump troubleshooting steps for low discharge volume and pull the pump for inspection.
Manual Section: Hydraulic Pump Troubleshooting p. 143Travel motor whining or grinding noise from the final drive after long travel runs
Drain the reduction gear oil and inspect it for metal particles. Refill with 330 cc (20 cu·in) of gear oil per the spec on page 365. If the noise continues, remove the travel motor after backing out the M10 fixing socket bolts, inspect the reduction gearing for wear, and torque the bolts to 5.6 kgf·m on reassembly.
Manual Section: Travel System and Engine Service Manual p. 365Hydraulic oil overheating and power fading after work in dusty or muddy conditions
Clean the cooler cores and check hydraulic oil condition; milky or dark oil means drain the system and refill all 22 liters (5.8 gal) with fresh oil and a new filter. Measure travel and slew performance against the test procedures starting on page 67. Inspect hoses and the pump area for stains while the machine cools.
Manual Section: Maintenance Standards and Test Procedures p. 67Frequently Asked Questions
What is the hydraulic pressure specification for the main relief valve on the SK16 and SK17?
The main relief valve pressure for the SK16 and SK17 is set to 210 +10/0 kgf/cm² (2990 +148/0 psi). This specification is found in the performance inspection standard table on page 70. p. 70
What are the replacement specifications for hydraulic hose fittings and connectors?
For O-ring type joints, the tightening torque for a 1/4 inch thread is 2.7 kgf-m (20 lbf-ft), 3/8 inch is 7.5 kgf-m (54 lbf-ft), 1/2 inch is 11 kgf-m (80 lbf-ft), and 3/4 inch is 16.5 kgf-m (120 lbf-ft). For 30-degree flare type joints, the 1/4 inch torque is 3.0 kgf-m (22 lbf-ft), 3/8 inch is 5.0 kgf-m (36 lbf-ft), 1/2 inch is 8.0 kgf-m (58 lbf-ft), and 3/4 inch is 12.0 kgf-m (87 lbf-ft). p. 244
What is the specified tightening torque for the cylinder head bolts on the 3TNE74 engine?
The specified tightening torque for the cylinder head bolts on the 3TNE74 engine is 6.0-6.5 kgf-m (M9 x 1.25). p. 513
What is the correct valve clearance for the intake and exhaust valves on the engine?
The valve clearance for intake and exhaust valves in cold condition is 0.15 to 0.25 mm for all models. p. 458
What is the engine oil capacity for the SK16 and SK17?
The engine oil volume for the SK16 and SK17 is 3.5 liters (0.9 gal) maximum and 2.0 liters (0.53 gal) effective. p. 33
Is this Kobelco SK16 Shop Manual a digital download?
This is a 600-page scanned PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print this Kobelco SK16 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Reviews
There are no reviews yet.