Need the factory rebuild specs for your Kobelco SK22 mini excavator? This 404-page shop manual (OEM #S5PFC101E) covers the SK22 PFC1 and SV22 from engine teardown through hydraulic pump overhaul. Inside: hydraulic circuit schematics tracing full flow paths for boom, arm, bucket, swing, travel, and blade systems, plus wiring diagrams covering the engine start/stop circuit, LCD monitor alarms, and battery charging. A thorough troubleshooting section walks you through non-breakdown phenomena, low engine output, overheating, smoke emission, and hydraulic malfunctions, backed by a complete error code list and torque tables for every major fastener. Torque the hydraulic pump mounting bolts to 116-138 N·m; travel motor bolts get 67-79 N·m. Your machine is down and the clock is running. Download now, search any spec by keyword, and get back to work.
What's Inside This Kobelco SK22 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 2-12 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 14-34 | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List, Specifications for Attachment, Periodic Inspection and Servicing, Fuel |
| Service Standards | 36-63 | Machine Performance Standards, Engine Nominal/Allowable Values, Undercarriage Wear Limits, Control Lever Play, Hydraulic Cylinder Torques, General Bolt Tightening |
| Engine | 64-197 | Safety Statements, Cylinder Head Disassembly, Fuel System Components, Cooling System Maintenance, Lubrication System Checks, Starter Motor Servicing, Alternator Troubleshooting |
| Electric System | 199-216 | Electrical Equipment Layout, LCD Monitor & Alarms, Engine Start/Stop Circuit, Battery Charging, Error Code List |
| Hydraulic System | 218-309 | System Outline, Circuit Operation (Boom, Arm, Bucket, Swing, PTO, Blade, Travel), Hydraulic Pump Disassembly, Control Valve Repair, Pilot Valve Troubleshooting |
| Adjustment and Repair | 310-373 | Engine Removal/Reinstallation, Undercarriage Components, Control Linkage Adjustment, Swing Bearing Service, Hydraulic Pump/Control Valve/Swing Motor/Swivel Joint Removal |
| Troubleshooting | 374-403 | Non-Breakdown Phenomena, Engine Low Output, Overheating, Smoke Emission, Starter Motor/Battery Issues, Hydraulic System Malfunctions, Travel Equipment Problems |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel motor mounting bolts torque | 67 to 79 N·m | p. 55 |
| Hydraulic pump mounting bolts torque | 116 to 138 N·m | p. 55 |
| Battery voltage - 5 hrs rate capacity | 12-45 V - Ah | p. 24 |
| Battery holding rod torque (Nut M8, For lock nut) | 23 to 27 N·m | p. 53 |
| Starter motor nominal output | 12 - 1.4 V - kW | p. 24 |
| Starter motor pinion coming out voltage | ≦8 V | p. 26 |
| Air filter element filtration area | 0.9 cm² | p. 23 |
| Air filter element maximum air intake restriction for replacement | 0.90 psi (6.23 kPa; 635 mmAq) | p. 74 |
| Fuel filter element filtration area | 432 cm² | p. 23 |
| Hydraulic suction filter filtration accuracy | 125 u | p. 20 |
| Hydraulic return filter filtration accuracy | 15 u | p. 20 |
| Overall length (Transportation position) | 3775 mm | p. 16 |
Kobelco SK22 Common Problems This Manual Covers
Kobelco SK22 starter motor does not turn, engine cranks slowly or nothing happens when key turned p. 199
Check battery voltage first — the spec calls for a 12V/45Ah unit (page 24). Clean and tighten both terminals; corrosion is the number-one culprit on small excavators. Test the starter relay and inspect the fuse block in the electric system panel. Verify pinion engagement voltage is at or below 8V (page 26). If voltage and relay check out, pull the starter motor and bench-test the solenoid before condemning the unit.
Manual Section: Engine Start/Stop CircuitHydraulic implement moves slowly, bucket lacks digging force, or all functions feel weak simultaneously p. 389
Check hydraulic oil level — tank capacity is 20 L (page 20). Inspect the return filter; replacement intervals are first service, then every 500h or 1000h/year (page 30). The return filter filters at 15 microns and the suction strainer at 125 microns — a clogged suction screen starves the pump. If flow and filter condition are good, measure system relief pressure against the 21 MPa set point (page 18). Refer to the hydraulic troubleshooting charts for step-by-step pressure testing.
Manual Section: Hydraulic System Troubleshooting (Charts)Engine overheats under load or coolant temperature alarm triggers during normal digging cycle
Inspect the radiator core and cooling fan for debris packing — a blocked core is the fastest path to thermal shutdown on a mini excavator. Check coolant level and condition. Verify engine oil is filled to capacity (3.9 L, page 32); low oil accelerates heat buildup. Confirm the engine reaches rated speed of 2200 rpm under load (page 22) — a fuel restriction or dirty air filter can force the engine to lug and overheat. Replace the air filter if intake restriction exceeds 6.23 kPa (page 74).
Manual Section: Engine Troubleshooting (General)Machine pulls left or right while travelling, cannot travel straight on flat ground p. 397
Check track tension and inspect both undercarriage sides for packed debris around rollers and idlers. Confirm travel motor mounting bolts are torqued to 67–79 N·m (page 55). If hardware is sound, pull up the travel equipment troubleshooting chart (page 397) and verify flow to each travel motor independently. Unequal pressure between left and right circuits points to a pilot valve restriction or control valve spool issue rather than a mechanical problem.
Manual Section: Travel Equipment Troubleshooting (Charts)Battery drains overnight or won't hold a charge after normal operating hours p. 199
Inspect battery terminals and the holding rod nut, torqued to 23–27 N·m (page 53). Check the battery spec: this machine uses a 12V/45Ah unit (page 24). Test charging system output with a multimeter at the battery while the engine runs — a failing alternator is the common culprit when the battery checks good standalone. Review the electric system error code list (page 212) for battery charge fault codes before condemning parts. Clean any oxidation from ground straps back to the frame.
Manual Section: Electric SystemPilot valve controls feel heavy, handle sticks or won't return to neutral after releasing joystick
Remove the operator console armrest and inspect the pilot valve body for external leaks and the rubber boot for cracks — torn boots allow contamination into the pilot circuit. Check pilot circuit cut-off valve set pressure against the 3.5 MPa spec (page 63); low pilot pressure causes sluggish or non-returning handles. Refer to the pilot valve troubleshooting index for the full diagnostic sequence covering no movement, lack of speed, and neutral-return failures.
Manual Section: Pilot Valve TroubleshootingFrequently Asked Questions
What does the service diagnostic menu show on a Kobelco excavator?
The manual does not describe a specific 'service diagnostic menu'. However, in the event of machine failure, the LCD monitor displays icons and error codes corresponding to the failure, along with warning and/or caution lamps. The LCD screen also shows operational parameters like clock, hour meter, fuel meter, and engine water temperature.
How do I troubleshoot a Kobelco excavator that will not start?
To troubleshoot a non-starting excavator, refer to the 'Starter Motor Troubleshooting' flowchart on page 29. Initial checks include verifying the shift lever is in NEUTRAL, the battery is fully charged, and terminals are clean. Further steps involve checking the solenoid switch, starter motor operation, pinion and ring gear meshing, engine oil viscosity, and if the engine turns when the starter motor is replaced.
Where are the start relay and anti-theft/anti-start relay on a Kobelco excavator?
The manual lists a 'Safety relay' (Ref. No. 12) and a 'Relay timer, stop solenoid' (Ref. No. 13) in the electric equipment list on page 68. The safety relay cuts off the connection between the safety relay S (2P coupler) and the starter motor S when the engine speed reaches the rated one, preventing overrunning. There is no mention of an 'anti-theft' or 'anti-start' relay.
How to read Kobelco excavator fault codes
In the event of machine failure, icons and error codes are displayed on the LCD screen, and warning/caution lamps flash. For specific details on error codes, refer to Section 5-5, which provides a list of codes, their descriptions, detection conditions, causes, and corrective measures.
How quickly can I access this manual after buying?
A 404-page Shop Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Are there hydraulic schematics in this Kobelco SK22 PFC1, SK22 manual?
Yes, complete hydraulic schematics with flow diagrams, valve configurations, and pressure specifications are included.
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