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 III or 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. Read here what the DPF in a heavy machine is and what it is necessary for?
Problems in hydraulic systems due lack of maintenance
Hydraulic systems in construction equipment are exposed to demanding operating conditions and high mechanical stress. Insufficient maintenance, contaminated hydraulic oil, clogged filters, cavitation, and the mixing of different hydraulic oils can lead to increased wear, corrosion, and system malfunctions up to a costly event such as a hydraulic pump break-down. Regular maintenance, adherence to oil and filter replacement intervals, and continuous monitoring of oil condition are essential to maximize component life and prevent costly downtime. Read more…
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. Are your racked machines have increased wear on components? Read here about how to extend the life of your tracked excavators or bulldozers. If you wish to know exactly what the condition of your tracked machine undercarriage is you can measure it and estimate the remining life time.
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.
Operating Heavy Machinery in high ambient temperatures
Increasing global temperatures are challenging for humans and also for machinery. Get her some info about the best practice for use of machinery in high ambient temperatures.
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.
How to verify the real working hours of heavy machinery
When purchasing used construction equipment, especially machinery with multiple previous owners, accurately determining its operating hours can be challenging. Over time, machines may undergo component replacements, have their hour meters swapped out, or even be assembled from parts of other machines. The main components, such as engines, hydraulic pumps, and transmissions, typically have a lifespan of 10,000 to 20,000 operating hours, and replacing them can be costly. Knowing how many hours each component has operated is essential.
How can I check if my excavator hydraulic pump is working well?
In the event that the hydraulic excavator does not have enough power or even when buying an excavator, it is useful to check whether the hydraulic pump has enough power. Normally, however, you do not have any equipment for measuring pressure with you. Don’t forget that pressure alone is not a criterion for sufficient power. You would also have to measure the volume of the oil flow.
How to measure engine blow-by
A combustion engine operates by burning fuel in a cylinder, where a piston moves up and down. The piston is sealed towards the cylinder by piston rings. However, a certain amount of exhaust gas escapes from the combustion chamber into the crankcase housing, which is referred to as “blow-by.” A visual representation of this can be found at diesel.net. So the question now is how to measure engine blow-by or estimate the volume.
Free Daily Ckecklist for Heavy Machinery
You can download here a free daily pre-shift checklist for heavy machinery operators. Get machines safely started without causing damage to the system. Keep an overview about the maintenance status.
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