Cummins engine cylinder liner
Publish Time: 2022-03-13 Origin: Site
Before removing a Cummins engine cylinder liner , an initial check should be made to determine if they can be reused. What is such a check?
Check the inside of the sleeves for cracks, abrasions or gouges, and for deep vertical scratches that can be felt with a fingernail.
It is necessary to check the inner surface of the sleeves for the absence of polished spots.
Moderately polished areas in the wear area usually have a mirror surface with honing or etching marks, while highly polished areas in the wear area have a mirror surface without honing or etching marks.
Sleeves with a mirror polished surface or with signs of particle ingress due to broken parts should not be reused. Heavily worn cases have a notch on the inside near the top edge of the case.
Sometimes it happens that the sleeve is curved, its cross section is not round. Then, using a dial inside gauge, you need to measure the inner diameter of the sleeve in 4 places spaced 90 degrees apart, in the upper and lower zones of the piston stroke.
| Cylinder Liner Dimensions | ||||
| mm | in | |||
| Taper | 0.04 | MAX | 0.0016 | |
| Deviation from the correct round shape | 0.04 | MAX | 0.0016 | |
| Hole diameter | 114.04 | MAX | 4.4898 | |
If the surface of the sleeve indicates its unsuitability, the sleeve must be replaced. Honing or matting procedures are not suitable, as they will destroy the cross-hatching of the surface, which is necessary for the formation of an oil film. Do not remove or tamper with case seals that meet the test criteria.
Liner protrusion is the distance the liner protrudes from the surface of the cylinder block. Before removing the cases, this distance must be checked in the "uncompressed" state with a case protrusion gauge, part number 3164438.
| Cylinder liner protrusion | ||
| mm | in | |
| 0.026 | M�?N | 0.0010 |
| 0.122 | MAX | 0.0048 |
If the sleeve has been mounted correctly, but the protrusion of the sleeve is out of tolerance, it is necessary to machine the hole and add shims.
Now we will look at the procedure for removing the cylinder liner.
It is necessary to cover the crankshaft with a clean rag to protect its journals and oil holes from debris.
I would like to point out a very important point: to avoid damage to the cylinder block, it is necessary to install and use a liner remover (part number 3376015) in accordance with the instructions. It must not come into contact with the cylinder block casting at points (1), (2), (3) and (4) as shown in the figure.
It is necessary to install a liner puller in the center of the upper part of the cylinder block. Then turn the puller screw clockwise to move the sleeve out of place in the cylinder block. After that, remove the sleeve with both hands.
To avoid damage to the engine block of a Cummins engine, install and use a liner remover in accordance with the instructions. The puller plate must be installed parallel to the main bearing seats so that it does not overlap the outer diameter of the liners. A cylinder liner puller, P/N 3163745, can be used in place of the standard puller. A universal puller must be used with a puller plate, P/N 3822786.
The sleeve puller must be positioned in the center of the top of the cylinder block. Then turn the puller screw clockwise to dislodge the liner from its place in the cylinder block and remove the liner with both hands.
Make a mark with the cylinder number on each sleeve.