Massey Ferguson 1648, 1652, 1655 Tractor Manual

Model: Tractor 1648, 1652, 1655
Format PDF
Type: Workshop Manual
Publication No: 4283387M2

Massey Ferguson 1648, 1652, 1655 Tractors Workshop Manual – 955 Pages
Parts Catalog – 170 Pages

Manual Table of Content 

1. GENERAL INFORMATION
2. ENGINE
3. MAJOR COMPONENTS
4. CLUTCH
5. TRANSMISSION
6. HYDROSTATIC TRANSMISSION
7. REAR AXLE AND BRAKES
8. FRONT AXLE
9. HYDRAULIC SYSTEM
10. ELECTRICAL
11. HYDROSTATIC STEERING
12. CAB AND AIR CONDITIONING

Manual Extract – Nozzle And Nozzle Holder

The nozzle is composed of the nozzle body and needle valve. As the nozzle has to operate under very severe conditions (high temperature and high pressure) it is made of special material and manufactured with high precision. Especially the nozzle body and needle valve are processed as a pair, so they should be replaced at the same time. The nozzle should inject the highly pressurized fuel from the injection pump into the combustion chamber most adequately in spraying condition, spreading area, and time.
The nozzles employed in this engine are throttle type. The throttle type nozzle has a unique injection property the pressure rising due to combustion advances mildly. This also means smooth combustion, which results in comparatively silent operation with less diesel knocking.  Valve closes – needle valve rests on seat. Valve opens – needle valve is lifted up.