BI005074
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Use a torch to break the welds on the bushing retainers and remove the retainers.
d.
Apply maximum pressure with the grease gun to break the sleeve loose from the c e n tel' pin tIe b e a I' i n g. l{ e m 0 v e the sleeve assembly from the center pintle.
c.
I{emove the bushing retainer and bushing from the sleeve.
f.
Clean and inspect all parts. 1{ppair or replace all worn or damaged parts and reassemble in reverse of disassembly. disassemhly.
h CAUTION: When using the torch be . . sure to follow all safety measures to help prevent an accident or injury. H.
Remove the bushing holddown capscrews. Insert eight l"-UNC X 1;)" bolts in the tapped holes in the bushing. Tighten the bolts equally to force bushing from the center pintle bearing.
NOTE: It may be necessary to crib or jack under the revolving frame to align the frame with the center pintle and remove any side pressure on the bushing. 9.
Clean the bearing bore and the center pintle of any dirt or burrs. Screw four rod bolts ;j /4" X 17" lINC equally spaced. into the tapped hole,.; in the center pintle bearing. Set the bushing halves on the rod bolts and install full nuts on the rod bolts. Tighten the nuts equally to press the bushing into the center pintle bearing.
NOTE: Be sure the bore and outside diameter of the bushing halves are well lubricated. The bushing has a clearance of .032 to .039 inch to the center pintle and a clearance of .000 to .004 to the center pintle bearing. 10.
11.
When the bushing is within two inches of being seated, remove the rod bolts and insert the pight bushing holddown bolts. l.Jse the hold down bolts to finish seating the bushing. Install the bushing retainer and tack weld. Rein stall the rest of the rna terial in reverse of disassembly.
h CAUTION: Have an electrician verify . . that all electrical connections are made and that all electrical lines are meggered for shorts before power is restored to the machine. 12.
For parlier machines with a sleeve mounted cen tel' pin tIe bush ing proceed as follows for bushing replacement: a.
Follow steps 1 through 6 as listed for latest style center pintle bushing.
b.
1{emove the sleeve holddown bolts.
c.
Attach a grease gun and fittings, capable of 10,000 PSI with N2 grease, to the hydraulic pressure hole in the center pintle bearing.
SWING RACK Inspect the swing rack and pinion weekly to insure there are no bare n1l'tal spots or contact points, brokpn tooth ends, loose bolts or broken welds at back of rack. In particular, check for pitting. abrasion, scratching, spalling, and galling as shown in appendix under the topic, GEAH INSPECTION. All teeth should carry a good coating of protective lubricant. If during inspection a broken tooth is noted, shut down the machine immediately and do not operate the machine until the tooth has been repaired. For repair instructions for broken or cracked teeth, refer to appendix.
WARNING: Continued operation of the machine with one or more broken teeth in the swing rack could result in additional damage to the swing rack, swing pinions and swing machinery units. REPAIR Although uncommon, if complete cracking of a swing rack segment is noted, the rack segment can be replaced using the following proced ure. Prior to initiating the repair, contact the Bucyrus-Erie Service Departmen t so that the cause of the cracking can be traced. 1. Move the machine to a safe area with adequate space to perform the repair. 2. Swing the machine so the damaged rack segment lies behind a roller circle section not having an upper rail. Shut down the machine and tag the controls. ;L Hemove the roller circle section completely as
described under topic I{OLLER CIRCLE. Install ramps sloping down from the rail pad toward the damaged rack section (figure ;n.
BUCYRUS-ERIE COMPANY. 1985
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