Kobelco SK135SR-1E Excavator Factory Shop Manual 2002-2003 (P/N S5YY0004E2, first edition)
Kobelco Models Covered & Key Technical Specifications
Models: Kobelco SK115SR-1E, SK135SR-1E, SK135SRLC-1E, SK135SRL-1E
Sub-models / Variants: LC (Long Crawler), L (Long), 1E, Dozer Blade variants
Model Years: 2002–2003
Serial Numbers: YV02-01701–, YY02-03001–, YH02-01301–, LK02-01041–, YV03-02194–, YY03-04464–, YH03-02077–, LK03-01107–
Technical Data:
- Engine: Isuzu BB-4BG1T, 4-cylinder, 4,329 cc displacement
- Power Output: 58.8 kW (80 PS) to 62.5 kW (85 PS) at 2,050 RPM
- Max Torque: 30.0 kgf·m (217 lbf·ft) to 32.4 kgf·m (235 lbf·ft) at 1,600 RPM
- Main Relief Pressure: 210 kgf/cm² (2,990 psi)
- Overload Relief Pressure: 280 kgf/cm² (3,980 psi)
- Fuel Tank Capacity: 139 liters
- Swing Speed: 11.4–11.7 rpm
- Travel Speeds: 1-speed (2.8–3.5 km/h) / 2-speed (5.1–6.0 km/h)
Kobelco Manual Features & Content Preview
- Official 993-page OEM publication (Book Code No. S5YY0004E2), first edition February 2002 with first revision December 2003
- Covers the 2002–2003 Kobelco SK115SR-1E, SK135SR-1E, SK135SRLC-1E, and SK135SRL-1E crawlers, including standard and dozer-blade equipped machine variants
- Documents key machine identification across 8 serial number ranges and includes 41 detailed specification and maintenance performance tables
- Details the technical foundations for the Mechatro control system and Isuzu BB-4BG1T engine performance baseline used in the initial 2002 launch series
Component and System Documentation
This OEM publication breaks down the complete technical framework of the SR-1E crawler series. It details essential specs and maintenance requirements needed in a professional shop environment. You get in-depth coverage of major machine systems. This includes the structural assembly, travel mechanisms, and hydraulic circuits. Dedicated sections outline the Mechatro control architecture and Isuzu engine specifications. The manual segments information cleanly into outline specs, maintenance schedules, system diagnostics, and installation procedures for optional attachments like hydraulic breakers.
Specification and Reference Data
Technical shop data focuses on precise tolerance charts, capscrew torque specifications, and fluid pressure thresholds. For example, the manual documents the standard hydraulic main relief pressure at 210 kgf/cm², along with a 139-liter fuel tank capacity for the SK135SR-1E. Shop mechanics can use the provided reference values for cylinder operating times and swing speeds to verify hydraulic performance against original factory standards. It also defines exact calibration sequences for the C-1 Mechatro controller and governor motor assemblies. Keep in mind that heavy machinery operates under extreme pressures. A certified technician must evaluate these systems prior to executing any major service work to ensure shop safety and equipment integrity.
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