New Holland TT55, TT65 and TT75 Tier 3 Tractor Service Manual

Table of Content (Service Manual)

Contents
Introduction
Engine
Clutch
Transmission
Four Wheel Drive System
Front axle system
Rear axle system
Power Take off
Brakes and Controls
Hydraulic System
Steering
Wheels
Electrical System
Special Tool Index
Foreword

All maintenance and repair of this tractor described in this manual should be carried out with the upmost precaution. All instructions should be carefully observed and special equipment where indicated should be used.

Anyone who carries out service operations described without carefully observing these prescriptions will be directly responsible for any damage caused.
Notes for equipment
Equipment which NEW HOLLAND proposes and shows in this manual is: – Studied and designed expressly for use on NEW HOLLAND tractors.
– Necessary to make reliable repair.
– Accurately built and strictly tested to offer efficient and long-lasting working life.
Notice
The words “front”, “rear”, “right-hand side” and “left-hand side” refer to the different parts as seen from the operator’s seat oriented to the normal direction of movement of the tractor.
Engine – Static description

The engines are with 4 cylinders (TT75) and 3 cylinders (TT55), naturally aspirated in (TT65) 3 cylinder with turbo charger. Both engines feature cross flow cylinder heads, with the inlet and exhaust manifolds on opposite sides of the cylinder head. The fuel and air combustion process, takes place in the specially designed bowel in the crown of the pistons.

Cylinder head assembly

The cylinder head incorporates valves and springs, with the valve rocker arm shaft assembly bolted to the cylinder block through the cylinder head. Cylinder head retaining bolts are evenly spaced with a six-point pattern around each cylinder, this ensures an even clamping load across the cylinder head.

The intake and exhaust manifolds are bolted to the head. The intake manifold is mounted on the right-hand side of the engine, with the diesel injectors mounted outside the rocker cover. The exhaust manifold is mounted on the left side of the engine.