2003–2012 Komatsu SK714-5, SK815-5, SK815-5 turbo Skid-Steer Loader Shop Manual (WEBM005600)

This Komatsu shop manual covers the 2003–2012 SK714-5, SK815-5, and SK815-5 turbo skid-steer loaders in the serial ranges listed above. It covers structure and function, testing and adjustment, removal and installation, and maintenance standards for workshop repair.

Search, navigation, and diagram detail: Most technical text is searchable, but the serial numbers and document code on the cover are not. Chapter and component bookmarks are included; the Main Menu link requires a separate file, and the cylinder-assembly bookmark opens one page late. Small wiring labels require zooming.

• Engine service: Compression and oil-pressure testing, valve-clearance and injection-timing adjustment, cylinder-head removal, and turbocharger removal and installation.

• Hydraulic testing: HST charge-pressure checks, AS valve calibration, main-relief adjustment, servo-control testing, hydraulic bleeding, and tank pressurization.

• Travel and axles: Travel-deviation adjustment, drive-chain tensioning, wheel-hub disassembly and shimming, and final-drive removal and installation.

• Work equipment: Boom and bucket-cylinder removal, cylinder disassembly and assembly, seal installation, and linkage inspection limits.

• PPC controls: Drive-pressure regulation, lever-clearance adjustment, and safety-sensor positioning, with standard and pattern-change control layouts.

• Electrical circuits: Engine, frame, cab, and lighting diagrams with connector views, wire codes, fuse ratings, and safety-control connections.

This manual suits workshop technicians equipped for hydraulic pressure testing, component lifting, and cylinder assembly.

Engine, Fuel System, and Cooling

The engine specifications distinguish the 4D88E-1FD in the SK714-5 and SK815-5 from the S4D84E-1FD in the turbo model. Separate procedures address the cylinder-head, muffler, and fuel-tank arrangements.

Engine repair coverage includes removal of the complete engine-pump group, injection nozzles, and injection pump, with timing checks and cylinder-head tightening sequences. A full bottom-end engine overhaul is outside this manual's scope.

Cooling-system procedures cover the coolant pump, radiator/oil-cooler group, and fan-belt adjustment. Starter and alternator removal are also documented.

HST Pumps, CLSS, and PPC Controls

The LPV40+40 tandem-piston pump sections cover Standard and High-Flow layouts. The SK815-5 and SK815-5 turbo use AS-valve and shuttle-valve controls; matching these layouts to the pressure tests helps you select the correct checks before hydraulic repair.

The Closed-center Load Sensing System (CLSS) section explains bucket self-leveling, pressure compensation, and series-to-parallel switching. Control-valve drawings distinguish the standard three-spool arrangement from the four-spool Super-Flow version for the SK815-5 and SK815-5 turbo.

The Hydraulic Circuit SK714-5 and Hydraulic Circuit SK815-5 – SK815-5 turbo drawings include hose and port connections. Control-valve procedures cover removal, installation, and main-relief adjustment; the unloading valve is nonadjustable.

Drive Chains, Wheel Hubs, and Loader Cylinders

Power-train section views trace the chain drive from the two-speed travel motors and final-drive reduction gears to the axles, with parking-brake construction explained separately. Wheel-hub repair includes bearing removal and shim-pack selection, with chain master-link positioning illustrated.

Boom and bucket-linkage procedures include pin, bushing, and clearance checks. Incorrect cylinder-assembly handling can damage new seals and sliding surfaces; the manual flags seal orientation and the required installation tooling.

Follow the manual's precautions for raised-boom and cab support, hydraulic-pressure release, and electrical isolation.

Wiring Diagrams and Safety Controls

Electrical Diagram (Engine Line) identifies the Yanmar engine circuits, while Electrical Diagram (Frame Line Optional) covers the additional attachment controls. Standard and optional cab circuits include harness layouts and component lists.

Internal Connection Control Panel views map the warning lamps and gauges. Safety-control wiring covers the seat switch, safety-bar sensor, parking brake, and second-speed controls.

Test Equipment and Repair Standards

The special-tool list specifies pressure gauges, adapters, tachometers, and the Yanmar TOL-97190080 compression-test kit. Reference tables provide tightening torques, fluid capacities, spring inspection criteria, and pin-and-bushing clearance limits.

Printable PDF and Included Pages

The ZIP contains one printable English PDF. This is a 248-page PDF, including one cover page, two revised-page lists, and 12 blank or intentionally blank pages; all are already included in the total.