A collection of technical information for users, buyers and maintenance staff of heavy machinery such as excavators, bulldozers and other big machinenery.
Downgrading of engines in construction machinery, DPF removal
How can we downgrade an engine to a lower Emission status i.e. from TIER V to TIER II ? Can we remove the DPF? Can we disable the Ad-Blue injection system? What happens if we remove the particle filter? Read here more about DPF removal from engines in construction machinery.
How to evaluate swing bearing play of an excavator?
Hydraulic excavators have a slewing ring. This is a large roller bearing with teeth attached to it. The upper carriage of the excavator can rotate endlessly on this bearing. This rotation is caused by a slewing gear. The slewing ring of the excavator is subject to normal wear and tear. Depending on how the machine is treated and maintained, the service life of a slewing ring is between 8,000 and 20,000 operating hours. The wear on a slewing ring can be measured to determine its condition. This measurement can be used to establish whether the values are still within the tolerance range or if the slewing ring will soon need replacing. This repair is extensive and expensive. Read more about replacing and measuring slewing rings of excavators and cranes here.
Track sag adjustment on excavator chains
Incorrect chain tension on excavator chains leads to excessive wear on chain links, bushings, and sprockets. Therefore, chain tension must be adjusted in accordance with the machine manufacturer’s maintenance instructions. Read more about how to adjust the track tension on an excavator.
Torque Stall Test for Heavy Equipment
Experienced engineers know ways to check the performance and condition of heavy equipment whoch is equipped with a torque converter. Many wheel loaders, bulldozers and articulated or rigid trucks have a torque converter in the power train from engine to wheel. With a single test it is possible to find out about the performance of engine, brakes, transmission and torque converter. Read more about the so-called torque-converter stall test.
The advantages of crawler loaders
Over the last couple of years the crawler loaders came a bit out of sight. That is astonishing as the machine has a couple of advantages that can make it a good substitute for wheel loader or track excavator applications. Of course these machines make only sense for some specific kind of jobs. But in these jobs the tracked loaders can deliver a great performance at reasonable cost. Read more about crawler loader advantages.