1.0 HP-104 & HP-106 MAINTENANCE
The HP-104 and HP-106 hottap drilling machines have been designed for rugged service and require a minimum amount of maintenance. Reasonable care is necessary to keep the machine in top operating condition for an extended period of time. Following are recommendations for proper care and handling.
A. When the machine is not being used, the exposed end of the boring bar should be protected.
2.0 MACHINE DISASSEMBLY
A. Loosen socket head set screw on the bearing
and cap retainer. See Image 2.
B. Use an Allen wrench to loosen the set screw in the top of the bearing and cap retainer. See Image 3.Use an Allen wrench to loosen the set screw in the top of the bearing and cap retainer. See Image 3.
C. Using packing wrench provided, remove retainer
nut next to bearing at top of machine by
turning counter clockwise. See Images 4 and
1. When removing the retainer nut, you must take care that the brass pellet inside does not fall out . It is this pellet that, when the socket head cap screw is tightened, locks the feed tube and body tube together for plug setting operations.
D. Remove snap ring and three piece thrust bearing
at top of machine. See Images 6 and 7.
E. Remove boring bar through bottom of machine.
See Image 8.
H. Remove packing retainer nut, using packing wrench provided, from body tube by turning clockwise (threads are left handed). Remove packing. See Images 9 and 10.
3.0 MACHINE REASSEMBLY
A. Reassembly procedures are basically the reverse of steps A through H of paragraph 2.0, MACHINE DISASSEMBLY. However, the following additional information is provided and refers to various steps in the disassembly procedures.
1. Prior to assembly grease all parts.
2. Replace packing (step H). Replace packing with high temperature packing. Enough sections should be used to make a stack 1" high. The grooves should be greased and inserted one section at a time with the lip toward the bottom. See Image 11.
3. Inspect packing retainer nut (from step F). A nylon insert on the side serves as a lock washer. Inspect this insert for condition. Replace if necessary. A nylon pellet 1/4" in diameter and 7/32" long will be required.
4. Remember that the packing retainer nut has left handed threads. Turn counter clockwise to install. Make sure that boring bar will rotate without excessive torque by tightening firmly.
5. Install thrust bearing (from step D). Grease each bearing individually when replacing three piece thrust bearing at top of machine. Inspect snap ring. See Image 13.
6. Install retainer nut (step C). Replace brass pellet with a new one, before installing retainer nut. See Image 14. It is held in place by grease.
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