Spare parts

40Mn2 Steel is to add manganese to ordinary structural steel to significantly strengthens the ferrite in the tissue. This will improve the strength and toughness of the steel. It’s chemical composition is as following. Chemical Composition of 40Mn2 Steel （%） C Si Mn P S Cr Ni Cu Mo W V Ti 0.41 0.24 1.51 0.029 0.005 0.15 0.01 0.03 0.01 0 0.003 0.004 40Mn2 steel is widely used in manufacturing crawler machine parts which working under heavy loads, such as Excavator and Bulldozer undercarriage parts, crankshafts and so on. It is a medium carbon manganese steel, which has high strength, plasticity and wear resistance. Its machinability and heat treatment process performance are also good. The physical property is as following. 40Mn2 Steel P hysical Property Yield Strenght ReL ( Mpa) Tension  Intensity (Mpa) Elongation A  (%) Cross-sectional Area Reduction Z ( %) General Loosen Center  Porosity 1015 1020 1060 1070 14 15 48 45 0/0 0/0 0.5/0.5 0.5/0.5 ​ Most of  Excavator t...

Track-chain  tension adjustment is the most controllable factor in undercarriage wear life. The accurate track sag of many crawler machines is 2 inches. Due to the complicated ground conditions, Track tension changes with many variations. You should clean out your tracks in daily life. ​ Cleaning track: Remove out between the track and the roller frame with a shovel, preferably when the packed material is still wet. During working, stuck and packed materials between mating components such as rollers, links, sprocket teeth, and bushings improve track tension degree. So tension needs to be adjusted any time packing in the track chain changes. When crawl machines go along, it should tighten the track up, so getting them cleaned out and adjusted is the important point to undercarriage life. To measure track-chain tension: * Roll the machine forward slowly and allow it to roll to a stop. * Center a track pin over the carrier roller. * Lay a straightedge or stretch a string over the trac...