John Deere 655, 755, 756, 855, 856 and 955 Compact Tractor Shop Manual

Machines covered

This manual covers six John Deere compact tractors sharing a common layout but different engines: the 655 (Yanmar 3TN66UJ, 658 cc), 755 and 756 (Yanmar 3TNA72UJ, 879 cc), 855 and 856 (Yanmar 3TN75RJ, 955 cc), and the 955 (Yanmar 3TN84RJ, 1430 cc). All are 3-cylinder diesels; compression ratios range from 17.8:1 on the 855/856 up to 22.4:1 on the 655.

What this manual covers

This is an aftermarket-style shop manual indexed by paragraph number rather than John Deere's own section/group numbering, with a Condensed Service Data table up front comparing engine, tune-up, and sizing specifications across all six models side by side. Transmission options include a hydrostatic unit paired with a 2-speed range gearbox.

Table of Contents

• Front Axle System (Two-Wheel Drive) - front axle assembly and steering linkage
• Front Axle System (Four-Wheel Drive) - front axle/steering linkage, front drive spindle, final drive, differential and input, front wheel drive gear case, maintenance
• Steering System - steering control valve, steering cylinder
• Engine (Models 655, 755 and 756) - timing gears/housing, valve clearance and springs, valves/guides/seats
• Engine (Models 855, 856 and 955) - cam followers, camshaft, connecting rods, crankshaft/main bearings, crankshaft oil seals, cylinder head, flywheel, oil pan, oil pump, piston/rings/cylinder, piston pin, rocker arms/push rods
• Transmission - charge pump, hydrostatic unit, lubrication, range transmission, tests/adjustments, troubleshooting
• Rear Axle, Final Drive and Brakes
• Power Take Off - clutch/drive shafts, control valves, mid PTO, PTO inertia brake, rear output shaft
• Hydraulic Lift System - hydraulic pump, flow divider/selective control valves, rockshaft/housing, rockshaft control valve, relief valves, cylinder cover/piston, tests/adjustments, troubleshooting

Good to know

The 13-digit product identification number sits on a plate below the rear PTO output shaft, and the engine serial number plate is on top of the rocker arm cover - both called out on the manual's first page since model identification matters when four different engines share one chassis design.