2009–2010 Kawasaki Mule 4010 Trans Gas Factory Service Manual (P/N 99924-1407-01)

• Kawasaki service manual content for the Mule 4010 Trans Gas, KAF620R9F and KAF620S9F, supplied as a 539-page PDF.
• Engine procedures cover removal and installation, compression testing, cylinder-head disassembly, valve-seat repair, and valve-clearance inspection and adjustment.
• The belt-drive torque converter and transmission sections detail drive/driven pulley rebuilding, belt-deflection adjustment, case separation, and internal gear and shift-mechanism service.
• Final-drive coverage includes front differential teardown, LSD clutch-torque inspection, pinion-bearing preload, bevel-gear backlash, and tooth-contact adjustment.
• DFI troubleshooting combines service-code diagnosis with throttle-sensor adjustment, injector electrical checks, and fuel-pressure and flow-rate testing.
• Electric power steering (EPS) procedures include motor and torque-sensor diagnosis, ECU replacement, service-code clearing, and neutral-position registration.
• Cooling-section limitation: printed pages 4-15–4-16 are missing from this PDF, including the thermostat removal, installation, and inspection procedures.

Technical System Walkthrough

This factory reference outlines service parameters for the Mule 4010 Trans Gas across 18 primary chapters. The KAF620S is the camouflage version of the KAF620R, with the same controls, features, and specifications. California-specific canister inspection and fuel-vapor hose routing are covered separately.

The liquid-cooled, 2-cylinder OHV engine uses MIKUNI AC34 fuel injection and a DENSO ECU. Internal repair coverage extends to camshaft/crankshaft timing, piston and ring installation, cylinder boring and honing, and connecting-rod and crankshaft inspection. Valve-guide clearance is addressed with the wobble method. Oil-pump clearance checks and relief-valve inspection are covered in the lubrication chapter.

The valve-seat repair section flags a specific risk: overgrinding can sink a valve too far into the head, making clearance adjustment impossible and requiring cylinder-head replacement.

Drivetrain sections distinguish the converter from the high/low/reverse gearbox. Shift-cable adjustments cover range selection, 2WD/4WD engagement, and the differential lock. Shaft service includes propeller-shaft alignment and axle-joint boot replacement.

Chassis repair covers rack-and-pinion preload adjustment, MacPherson struts, and the De Dion rear suspension with leaf springs and shock absorbers. The Trans-specific frame material covers folding rear-seat hardware, cargo-bed removal, and bed-latch adjustment.

Hydraulic drum-brake procedures include master-cylinder cup replacement, wheel-cylinder service, and line bleeding. Cooling coverage includes water-pump mechanical-seal inspection and replacement, radiator-cap testing, coolant filling, and air bleeding.

DFI, EPS, and Electrical Diagnosis

DFI diagnosis goes beyond sensor reference voltages. It explains warning-light blink codes, identifies the Kawasaki Diagnostic System (KDS) connector, and covers ECU power/ground checks. Service Code 11 covers the main throttle sensor, subthrottle sensor, and subthrottle actuator or mechanism, with component-specific tests to separate the possible faults.

The fuel-pump section distinguishes diagnosis from internal repair: its built-in pressure regulator is not removable, and clogged internal filters call for pump-assembly replacement. The factory-set EPS motor and torque sensor are likewise serviced as part of the EPS unit, not rebuilt individually.

Neutral-position registration is documented for affected steering repairs and EPS ECU replacement. The EPS service-code clearing procedure differs from the DFI system, whose stored fault history cannot be erased on this model.

Charging-system testing, ignition-coil and crankshaft-sensor peak-voltage checks, and starter-motor disassembly support electrical fault tracing. Regional battery instructions distinguish U.S. and Canadian configurations.

Specification and Reference Data

Factory-standard torque tables, locking-agent callouts, fluid capacities, lubricant requirements, wear limits, and electrical test specifications accompany the service sections. The maintenance charts distinguish initial and regular service from calendar-based replacement requirements.

The vehicle wiring diagram is backed by the DFI System Wiring Diagram, EPS System Wiring Diagram, and ECU connector-terminal views. The Coolant Flow Chart and Engine Oil Flow Chart trace the circulation systems. A Transmission Sectional Figure shows the gearbox layout, while appendix drawings document cable, wire, and hose routing.

Special-tool references identify the Throttle Position Sensor Measuring Adapter 57001-1719 and Drive Pulley Puller Bolt 57001-1429 for the related sensor and converter work.

Prior to initiating any diagnostic work or maintenance on these systems, always observe standard workshop safety protocols and secure the vehicle properly, including support for the raised cargo bed.