Diesel engines -- principles and technical requirements for disassembly

1. Disassembly principle

1. Understand and master the structure and working principle of diesel engine and its components.

2 when removing, consider the repair and assembly. For technical information and specifications of diesel engine, in the demolition must torque and related parameters for removing components recorded, such as fuel injection advance angle and valve clearance, unscrew the connecting rod bolt torque, remove the cylinder head nut torque, the components in the demolition of the former position, for assembly and exclusion fault.

3, do not arbitrarily expand the scope of repair.

4 follow the required disassembly principle

2. Safety technical regulations

The following rules shall be followed in order to ensure the smooth progress of the demolition work, to prevent personnel casualties, damage to tools and equipment, mechanical deformation, rust, disturbance, rework, etc.:

1 use tools appropriately. In the demolition must use a special tool of diesel engine, usually without wrench; in the tightening and remove screw torque should be appropriate, generally do not use extensions, to prevent the broken bolt; evenly in the demolition, to prevent excessive force caused by damaged parts.

2 prevent accidents and operations. Can not remove the hard part not removed, to understand the specific structure of the parts; remove not arbitrary expansion, according to the contents and items of repair, can not remove not down as much as possible; the detached parts should be placed orderly, not put together; long time cannot repair parts for rust treatment; remove the precision parts to put in pairs.

3, diesel generator disassembly general technology

It is not difficult to disassemble the diesel engine, but the cylinder head nut is generally required. For example, in the demolition of cylinder head nut, must be diagonally from the outside gradually dismantling, and divided into 2~3 times, do not wait for a nut after the demolition, and then split second. The correct method should be: one nut is loosened, then second screws, one by one in turn, disassembly.

1 disassembly of double headed screw. The double nut can be used when disassembling, and the utility model can not be disassembled under normal circumstances.

2 removal of rust nuts. The method first tight loose are detachable for rusty nuts, can also be used with uniform heating method to remove the torch.

3 disassembly of interference fit parts. Disassembly is usually performed with special tools.

4 mark, label. This is a very important work, removing the components (such as fuel injector, connecting rod, push rod, tappet rocker, inlet valve, exhaust valve, valve springs, valve lock and valve spring, a connecting rod nut, high-pressure tubing, various gaskets etc.) are labeled by the cylinder. The relative position between the various parts to explain what is the cylinder of the diesel engine, because in the process of operation, have certain differences in each cylinder wear.