Kval 990-HQ, Service Manual

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Replacing Tooling in the Front Section
3-35
990-HQ Service Manual
Remove and Replace the Chisels
After lockout tagout and access has been obtained to the assemblies, follow these instructions to
remove and replace the chisels
1.
Ensure air pressure is turned off and pull back the head to get better access to the
chisel assemblies.
2.
Use a 7/16 “wrench to loosen and remove the bracket bolts (2 per chisel) that secure
the chisels.
3.
Remove the bracket.
Note: The bracket has a tight tolerance and is a tight fit. You may have to use channel
grips to remove the bracket.
4.
Slide out
Chisel
Remove Bolts with a
7/16 “wrench
Bracket
Orientation
of Chisel
Slide the old chisel out of the assembly. Note the orientation of the chisel
FIGURE 3-26.
Replacing the Chisels
5.
Slide in the new chisels.
6.
Tighten bolts back and forth until the bracket is tight.
7.
Inspect and verify the work. Clean the work area.
8.
If maintenance is completed, replace dust cover and tighten bolts.
Remove and Replace the Screwdriver Bits
To replace screwdriver bits on the Six-Shooter heads, follow the instructions below.
1.
Turn off all power to the machine. Follow proper lockout/tagout procedures as
detailed in the safety section of Chapter 1 of this manual.
2.
Disconnect air from Six-Shooter using the air-connect slide valves. Slowly slide the
valves back toward you; listen for air to be released.
3.
Pull the Six-Shooter assembly toward the machine-it will move slightly.
4.
Locate the back slide near the air valves (see images); push slide away from you.
This allows for movement of the Six-Shooter assembly away from the machine