5-2 Lower Mechanism: Travel Drive Unit 4.) Assembling the housing (4) onto the flange (1-1) Check the following points. Then assemble housing (4) onto the flange (1-1) so that floating seal (2) on the flange (1-1) falls on floating seal (2) on the housing (4).
the the the the
Confirmation: a.Check that the sliding surface of the seal ring of the floating seal (2) is free from soil or dust. b.Apply lubricating oil for the reduction gear or hydraulic oil all around the sliding surface of the seal ring of the floating seal (1-2). c.When assembling the flange holder (1-1) on the housing (1-6), check that the shaft centers are aligned, and then proceed with the assembly.
Using a shim thickness adjusting jig, apply load of 3000 kgf on the end surface of the inner race of the angular bearing (3).
5-2.)
In this step, measure step dimension H between the inner race surface in the angular bearing (3) and the end surface of the flange (1-1).
5-3.)
Measure step dimension “h” for the holder (6).
5-4.)
Select the shim (5) and form a combination so that the shim thickness is appropriate for (H - h).
*1
*2
5-1.)
*3
5.) Selecting the thickness of the shim (5) According to the following procedure, select the shim thickness for pre-pressure adjustment.
*1 *2 *3
Note: a.Do not use the shim (5) that has been used once already. b.Perform this procedure securely. Failure of prepressure adjustment leads to breakage of the reduction gear during operation. c.Clean the surface subject to measurement and start measurement.
103
Press load 300 kgf Dimension H Dimension h
