Check the cylinder block we produce with overhaul engine repair.
Check and promotional block is performed for reuse.
Engine cylinders are made as one, without using sleeves.
When damaged or wear, the cylinders are not repaired.
Before removing the pistons assembled with connecting rods, we measure the protrusion value of each piston.
Using the measurement of the piston speakers, you can determine the possibility of grinding the upper surface of the cylinder block, if necessary.
Remove the engine as indicated in the article – Removal and installation of the engine Cummins ISF2.8 Gazelle NEXT
We disassemble the engine
Initial check
In front of the cleaning or further disassembly of the cylinder block, we examine it by checking the absence of damage (cracks, traces of abrasion, etc.), which can exclude the possibility of reuses.
Special attention is paid to the following positions:
- - covers and beds of indigenous bearings;
- - cylinders;
- - the upper plane of the cylinder block;
- - the surface of fastening the inlet of the water pump;
- - surfaces for gaskets in the front and rear of the cylinder block.
cleaning and checking the usability of the block
Check all the plugs on the lack of signs of damage or leaks.
If you need to thoroughly clean the cylinder block before reloading due to a large number of foreign particles or contamination, remove all the corresponding plugs.
Make sure that all channels of lubrication and cooling systems are cleaned.
Brush with non-metallic bristle and clean solvent cleaning the holes for lubrication in the cylinder block.
Thoroughly clean all sealing surfaces from the residues of the old gasket.
Remove the block from the stand
Clean the cylinder block in flushing container
Remove the cylinder block from flushing capacity.Clean the cylinder block ferry and enclosed air.
After cleaning the cylinder block, re-check it on the absence of signs of cracks, abrasion and color changes that will eliminate its reuse.
To detect cracks, use the buccin detection kit (Catalog number 3375432).
Special attention to the following positions:
- - covers and beds of indigenous bearings;
- - cylinders;
- - the upper plane of the cylinder block;
- - the surface of fastening the inlet of the water pump;
- - surfaces for gaskets in the front and rear of the cylinder block.
Check out all the threaded holes for the bolts for the absence of thread damage.
Fortors can be used to repair threaded holes.
The following repair kits are provided:
- Catalog number 3377905 - for carving american standard
- Catalog number 3377903 for metric thread.
Fortors can not be used to repair the threaded holes under the bolts of the covers of the indigenous bearings.When damaged, the cylinder block is replaced.
Check the surface of the cylinders for the absence of glossy sites.
On the surface of the cylinder, crosstalky lines, which are at an angle of 20-5 degrees relative to the upper plane of the cylinder block should be noticeable.
All measurements of the cylinder block must be carried out when it lies on a flat surface with installed indigenous bearing caps.
If the cylinder block is located on the stand and / or cover of the indigenous bearings are not installed, measurements can be inaccurate due to deformation. (This refers to the diameters of cylinders, holes for indigenous bearings, etc.).
Install the covers of the indigenous bearings without liners. Tighten the bolts of the native bearings.
Tightening torque - 80 nm.
Diameter Bed Bearing:
- - cervix 1 and 5 - 79,982 -3,1489 - 80.008 +3,1499 mm;
- - Shays 2, 3 and 4 - 79,977 -3,1487 - 80,013 +3,1501 mm.
If the diameters of the bed of indigenous bearings do not correspond to the norm, check the installation and orientation of the covers of the indigenous bearings.
If the covers of the indigenous bearings are installed correctly, the cylinder block is replaced.
We measure the length of the bolts of the native bearings, for possible use when assembling.
The length of the rod bolt of the root bearing must be no more - 119.25 +4.695 mm
Check out the non-plane of the cylinder block using the precision line and the probe.
Maximum non-reduction:
- - 0.075 +0.0030 - 0.010 +0.0004 mm, within the zone with a radius of 50 mm.
Check out the absence of small irregularities or defects. If they are presented, the upper surface of the cylinder block is grinding.
Grinding the upper surface of the cylinder block is allowed only if, after that, you can provide the required height of the piston speakers.
The use of repair pads after grinding the upper surface of the cylinder block is not provided.
If after such grinding it is impossible to provide the required height of the piston protrusion, the block of cylinders is replaced.
The diameter of the diameter of the cylinder is performed at a distance of more than 50 mm (1.97 inches) from the upper surface of the cylinder block to avoid reducing the accuracy of measurements.
When performing measurements, matting or boring of cylinders, all covers of indigenous bearings must be fixed by bolts, tightened with the required torque.
Check the surface of the cylinders for damage or excessive wear.
With the help of the dial nutomer (directory number 3376619), measure the diameter of the cylinder at 4 points that are 90 degrees from each other, in the extreme positions of the piston stroke.
- Diameter of boring: 93.99 -3,7004 - 94.01 +3,7012 mm;
- Deviation from roundness: 0.01 +0.0004 mm;
- Cause: 0.01 +0.0004 mm.
Block repair
Before repairing cylinders, it is necessary to close the oil canals and holes for pushers at the top of the cylinder block with waterproof ribbon.
Cylinder surface matting:
Matting provides the quality of the surface necessary for the normal operation of the piston rings.
Matting is allowed only when the sizes of cylinders still correspond to the norm.
Planting new piston rings in cylinders with a glossy surface will not be dense.
Use a round choning head (No. 3823612 according to the catalog) or a 300 - 400 rpm similar to the rotation frequency, which makes one cycle of movement in the vertical direction in a second.
Use high-quality haroning oil or a mixture of different SAE 30W and diesel fuel.
Vertical passages must be smooth and continuous over the entire height of the cylinder.
Check the cylinder hole after 10 passes.
The angle of applying crossed lines depends on the speed and speed of the vertical movement of the honing head.
Too high or too low movement speed will deviate this angle from the norm.
On the correctly matted surface of the cylinder, the cross-in-time lines, reaching at an angle of 20 - 25 degrees relative to the upper plane of the cylinder block, should be noticeable.
To remove a gloss, use a concentrated detergent solution in hot water to rinse cylinders.
Clean the cylinders immediately after matting.
Failure to follow this requirement can lead to the failure of the engine.
Rinse the cylinders until complete removal, cleaning agent.
Dry the cylinder block with compressed air.
Check the cleanliness of the cylinder surface, the rubbish of its white lint-free fabric, slightly moistened in the oil.
If there are abrasive material residues, continue cleaning to complete removal.
Rinse the surface of the cylinder solvent. Dry the cylinder block with compressed air.
When replacing the cylinder block or the use of the cylinder block, which was in stock, be sure to remove the engine and conservative oil from the surfaces of the cylinders, the places of installation of gaskets and beds of indigenous bearings before using it.