22
3.3.2
Instructions for replacing the tapered roller bearings of K53a-z/K53c-z/DKB-25-z/DKD-35-z
1.
Disconnect the hydraulic hoses.
2.
Remove the forks of the forklift truck.
3.
Take the box rotator from the forklift truck / tractor and put it on its back on a flat, stable surface.
4.
Take the pressure off the guide block (6) by loosening the pressure bolts.
5.
Support the rotating cylinder so it will no longer rest on the gear wheel of the fork carrier (9)
(use appropriate lifting equipment; the minimum lifting capacity must exceed the weight of the box rotator;
see technical data in chapter 2.1).
6.
Turn the adjusting bolts of the bearings in the locking plate (4) back one full stroke.
7.
Remove the locking plate after unscrewing the socket bolts. Prevent the fork carrier of the back plate from
unexpected movements.
8.
Pull the fork carrier from the shaft of the screwable fork positioner (3). Remove the tapered roller bearings
(14/15) from the shaft of the fork positioner and from the bearing housing of the fork carrier. Clean the
bearing housing and the shaft of the fork positioner, and check for wear and tear.
Contact the dealer after
detecting any wear. Also check the lubrication. The lubricant must be applied to the bearing bush via the
grease nipple and the opening on the shaft of the fork positioner. Clean the lubrication duct, if necessary.
9.
Push the new bearings around the shaft of the fork positioner and into the bearing housing, as shown in
figure 3.3.1.
10.
Return the fork carrier with the new sleeve bearing onto the back plate (1). Avoid any damage to the
bearings by means of good support and guidance. Make sure the fork carrier and the rotating cylinder are
repositioned correctly in relation to the back plate.
11.
Mount the locking plate using the socket bolts and secure firmly (100 Nm).
12.
Fasten the adjusting bolts of the bearings in the locking plate by hand and then turn back a quarter of a
stroke. Secure the socket set bolts using the lock nuts.
13.
Fasten the adjusting bolts of the adjusting strip (16) by hand and then turn back half a stroke.
14.
Return the guide block and put it under pressure using the pressure bolts (60 Nm). Secure the bolts using the
lock nuts.
15.
Put the box rotator back onto the forklift truck/tractor and return the forks.
16.
Lubricate the bearings, connect the hydraulic hoses, and check that the box rotator is working correctly.
Figure 3.3.1-Position of the tapered roller bearings