Case D25, D29, D33 Tractor Repair Manual

Manuals: Service Manual

SECTION 00 — GENERAL INFORMATION

SECTION 10 — ENGINE

SECTION 18 — CLUTCH

SECTION 21 — TRANSMISSION

SECTION 25 — 4WD FRONT AXLE

SECTION 27 — DIFFERENTIAL AND REAR AXLE

SECTION 29 — HYDROSTATIC TRANSMISSION

SECTION 31 — POWER TAKE-OFF SYSTEMS

SECTION 33 — BRAKES

SECTION 35 — HYDRAULIC SYSTEM

SECTION 41 — STEERING

SECTION 44 — 2WD FRONT AXLE

SECTION 55 — ELECTRICAL

This repair manual provides the technical information needed to properly service the Case IH D25, D29 and D33 tractors. Use this manual in conjunction with the operator’s manual for complete operation, adjustment, and maintenance information.

Manual Extract: CYLINDER HEAD AND VALVE TRAIN COMPONENTS

The cylinder head incorporates the valve assemblies, rocker arms, rocker shaft, push rods, and lifters. A swirl chamber located between the injector assembly and the main combustion chamber of the cylinders provides improved starting and greater fuel efficiency. Initial combustion starts in the pre combustion chamber and as the expansion occurs a strong swirl pattern is created in the main combustion chamber for more complete combustion of the air-fuel mixture. The air intake manifold is separate from the cast aluminum valve cover on all these engines. The exhaust manifold is bolted on the left-hand side of the cylinder head on each of the models. Cylinder heads have integral valve guides. Standard size valves only are used.

CYLINDER BLOCK ASSEMBLY

The cylinder block assembly contains the pistons, connecting rods, crankshaft, timing gears, and engine oil pump. The crankshaft is supported on four main bearings. The front bearing is positioned in a bore in front of the block. The second, third, and fourth bearings are split liners located in holders bolted to the block. The camshaft is supported on two ball bearings located on each end of the block.