2.Shuttle Circuit (hydraulic thumb

4.)Assembling the housing (4) onto the the flange (1-1)

Check the following points. Then assemble the housing (4) onto the flange (1-1) so that the floating seal (2) on the flange (1-1) falls on the floating seal (2) on the housing (4).

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.

5.)Selecting the thickness of the shim (5)

According to the following procedure, select the shim thickness for pre-pressure adjustment. 5-1.) 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).

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.

*1 Press load 300 kgf *2 Dimension H *3 Dimension h

*1

*2 *3

6.)Assembling the holder (6)

Fix the flange (1-1) in place, and erect pins (31) (four locations) on the flange (1-1).

Using grease, bring the shim selected under step 5.) to adhere to the holder (6), adjust so that pin hole rests on it with pin holes aligned, and then press fit the shim onto the holder.

Mount the washer (7) onto the holder (8), and tighten the bolt (8) with locktite applied around its neck at the specified torque.)

Note:

a.Check that the pin (31) is not down. b.The washer (7) is provided with a spike for resisting loosening. Install the washer with the spike on the washer side. c.Wash the thread section of the bolt (8) degrease it and apply locktite on the bolt. d.Clean the bore for the screw on the flange (1-1) and fully degrease it.

* Pay attention to the assembling direction for washer 7.

Assemble toward the direction shown in the figure on the right.