Weichai America Corp.
33
1.
With the engine crankcase (7) facing up, remove the main bearing bolts (8) and place them in
order to lift the crankcase (7).
2.
Lift the crankshaft (4), remove the front and rear thrust washers (2, 6); place the crankshaft on
the bracket (if placed too long, the crankshaft should be placed vertically).
4.4.4 Inspection
1.
Crankshaft main journal, connecting rod neck fillet whether there is a crack; crankshaft and
bearing joint inspection; check to clear the oil passage, whether there is a crack and other
anomaly.
2.
Check the main journal, connecting rod neck presence or absence of line-shaped grinding,
metal flaking and cracks.
3.
Check the crankshaft and seal with the wear and tear.
4.
Check the main bearing bolt thread failure.
5.
Crankshaft flange bolt holes for cracks.
6.
Crankshaft journal wear, crankshaft bending, distortion.
4.4.5 Installation
1.
Hang the crankshaft (4) on the support. Avoid knock bumps.
2.
Insert a cylindrical pin in the rear pin hole of the crankshaft (4).
3.
The oil pump gear is hot-mounted on the crankshaft and supplied to the assembly. To ensure
the good work of the oil pump gear, it is recommended to replace the crankshaft assembly
when replacing. In the case of special circumstances need to be replaced oil pump gear, be
sure to pay attention to gear heating temperature and placement distance: heating oil pump
gear (1) to (190 ~ 200)
℃
, and then push it into the front of the crankshaft (4). Ensure that the
gear outer end to the crankshaft front end of the size (26.5 ± 0.3) mm (special tooling
required).
4.
Check the crankshaft with or without knock bumps, if necessary, remove or replace. Purge the
oil chamber with compressed air to make the oil passage clean and open.
5.
Remove the oil from the underside of the cylinder block with detergent and wipe with a
towel.
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
