The crankshaft is removed and installed with the engine overhaul.

Preparatory operations

Removing the crankshaft

Remove the lids of the indigenous bearings.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

a) Check the presence of installation labels on the covers of the indigenous bearings and the cylinder block.

The numbering of the covers starts from the front of the engine.

b) Unscrew the bolts of the indigenous bearing cap, but do not remove them.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

c) Using 2 bolts as a lever, rally the indigenous bearing cover and remove it.Do not damage the bolt thread.

Remove the upper liners of the native bearings.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

Apply a label of relative location on the liner.

Tags we apply to analyze a malfunction.

Remove the crankshaft.

The crankshaft weighs more than 23 kg.It is better to shoot two or lifting mechanism.

Crankshaft cleaning and all parts

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

To clean the crankshaft, we use hot steam or hot soap water.

To clean the lubrication system channels, we use the ERS with a non-metallic brush.

After washing with enclosed air.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

You can not clean the thread by the tumper in the crankshaft holes.

We use fine-grained sandpaper paper for grinding processed surfaces.

If damage is detected, we replace the crankshaft.

Checking the crankshaft

Check the condition of the contact zone with the front axle of the crankshaft.

Check the condition of the contact zone with the crankshaft rear gland.

Check the status of connecting rod bearings.

Checking the gear of the crankshaft on the absence of point corrosion, abrasion or lack of teeth.

The rear crankshaft gear is not replaced.If it fails to remove scuffs using an abrasive bar (№3823258 according to the catalog) or its analogue, the crankshaft must be replaced.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

We check the neck of indigenous and connecting rod bearings in the absence of damage or increased wear. It is allowed to have minor scratches.

We measure connecting rod and native crankshaft.

Deviation from roundness is allowed 0.007 mm (0.0003 inches)

We measure, the diameter of the cranked crankshaft and write it.

Standard diameter of the crankshaft crankshaft 56,013 +2,323 - 58,987 -2,322 mm

We measure the diameter of the hole under the connecting rod crankshaft with the installed bearing and write it.

Standard hole diameter for crankshaft crankshaft in a connecting rod with an installed bearing: 62,37 -2,456 - 62,41 +2,257 mm

The gap in the bearing is equal to the difference between the diameter of the hole under the crankshaft in the connecting rod (with the mounted bearing) and the diameter of the crankshaft cranium.

The gap in the connecting rod bearing 3.357 -0.132 - 3,423 +0.135 mm.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

The gap in the bearing can be determined using a special probe when installing the crankshaft

If the clearance does not match the norm, replace the bearing or try installing another set of connecting rod bearings.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

Measure the diameter of the native crankshaft crankshaft and write it down.

Standard diameter of the root crankshaft 73,987 -2,9129 mm - 74,013 +2,9139 mm

Thereafter

We establish the cover of the indigenous bearings without a crankshaft with the upper and lower liners.

Tighten the bolts of the native bearings in stages:

  • - the first stage - 50 nm;
  • - second stage - 80 nm;
  • - Third stage - turn 90˚.

We measure the hole under the root neck with the installed bearing.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

We determine the clearance in the radical bearing.

The gap in the bearing is equal to the difference between the diameter of the hole under the root neck (with the installed bearing) and the diameter of the root crankshaft.

The clearance must be 0.041 -0.0016 - 0.105 +0.0042 mm

Also, the gap can be determined using a special plastic probe when assembling the engine.

We measure the length of the bolts of the native bearings, for possible use when assembling.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

The length of the rod bolt of the root bearing must be no more - 119.25 +4.695 mm

Checking the surface of the stubborn bearing on the absence of damage or wear:

Minor scratches are allowed.For grinding, we use fine-grained sandpaper.

The surface of the thrust bearing is located on the root crankshaft of the crankshaft number 4.

We measure the allowance for the stubborn bearing.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

The axial distance is 0.115 -0.0045 - 0.365 -0.0144 mm.

Setting the crankshaft

Lubricate the crankshaft with engine oil.

Making advantage of the absence of the upper liners of the indigenous bearings of dirt and extraneous particles, insert them into the cylinder block.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

When installing we combine the protrusions on the liners with protrusions in the beds of the indigenous bearings.

Install the liner of the kneading shaft stubborn bearing at the place of the indigenous bearing number 4

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

We apply the engine oil on the surface of the indigenous bearings and the stubborn bearing from the crankshaft.

Снятие и установка коленвала Cummins ISF2.8 Газель НекстСнятие и установка коленвала Cummins ISF2.8 Газель Некст

Ensure that the guide sleeves in the indigenous bearings covers are available.

Carefully put the crankshaft, preventing damage to the indigenous bearings and the shek.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

After making sure the lower liners of the low-incinerate bearings of the dirt and foreign particles on the reverse side of the lower liners, insert them into the covers of the indigenous bearings.

Be sure to align the protrusions on the liners with protrusions on the covers of the indigenous bearings.

We apply engine oil to the working surface of the indigenous bearings.

Make sure that there are no dirt and extraneous particles on the surfaces of the covers of the indigenous bearings between the lid and the cylinder block.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

On the covers of the indigenous bearings, there are rooms that correspond to the places of their installation, which were applied during the removal. Numbering begins from the front of the cylinder block.

The covers must be installed so that the numbers on them correspond to the beds of the bearings in the cylinder block.

The protrusions in bed and the lid of the root bearing should be on the same side.

Install the covers of the indigenous bearings. Be sure to align the guide sleeves on the indigenous bearing cover with the corresponding holes in the cylinder block.

Lubricate the thread and the bottom of the heads of the bolts of the indigenous bearings with clean engine oil.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

We establish the covers of the indigenous bearings in place, gently tapping in it with a plastic or rubber head.When the lid gets into place, install it bolts and tighten them.

Tightening torque is 50 nm.With the final moment, tighten the bolts after installing all covers.

After they installed and pre-tightened all the covers, we begin to finally delay:

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

Uniformly tighten the bolts in the sequence specified in the figure.We carry out each stage with all bolts before moving to the next step.

  • - the first stage - 50 nm;
  • - second stage - 80 nm;
  • - Third stage - turn 90˚.

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

We turn the crankshaft. The crankshaft must rotate freely after installing the indigenous bearing covers.

If the crankshaft does not rotate freely:

  • - Check if the crankshaft is hurt for one of the connecting rods;
  • - check the correct installation of the covers of the indigenous bearings;
  • - Check the absence of damage to the guide sleeves or the support surfaces of the indigenous bearing caps during installation;
  • - Check that the installation of indigenous bearings is installed.

Measure the axial play of the crankshaft using the dial indicator (Catalog No. 3824564).

Снятие и установка коленвала Cummins ISF2.8 Газель Некст

Axial left of a crankshaft 0.023 -0.0009 - 0.365 +0.0144 mm.

If the axial backlash does not correspond to the norm:

  • - If the axial play of the crankshaft is below the norm, check the absence of obstacles that limit its movement (oil pump, connecting rod, etc.);
  • - If the axial playback of the crankshaft is higher than the norm, check the surface of the knee-shaft resistant bearing.In addition, check the correct installation of the thrust bearing.

After that, we collect all the details in accordance with the assembly technology.