John Deere 90 Skid Steer Loader Technical Manual TM1205

John Deere technical manual TM1205 for the old 90 skid steer loader. This is the real dealer repair book, from November 1978.

The 90 has a gasoline engine, the Onan NHC-MS3406C. It is an air cooled twin, 983 cc (60 cu in.), rated 23 hp (17.1 kW). Drive is hydrostatic.

Compatibility and quick facts

• Make: John Deere
• Model: 90 Skid Steer
• Book code: TM1205
• Engine: Onan NHC-MS3406C, gasoline, 23 hp
• Drive: Hydrostatic pump and motors, final drive
• Edition: Nov 1978
• Manual type: Technical manual (service and repair)
• Language: English
• Length: 138 pages
• Format: PDF, download link right after checkout

What is inside

• General specs, lubrication and periodic service
• Gasoline engine repair: separation, disassembly and assembly
• Fuel system: carburetor and governor
• Electrical repair: starter
• Power train: hydrostatic pump, hydrostatic motor, final drive
• Steering and brakes
• Hydraulic pump and cylinders
• Operation and tests: engine analysis, electrical, power train and hydraulic system testing, with fault diagnosis

Common questions

Does it cover the engine rebuild?
Yes. Section 25 covers engine separation, disassembly and assembly.

Is there a parts list?
No. It is a repair and test manual.