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this difference becomes 0.0015 inches or more, then the efficiency of the rammer is
reduced to the point where one should replace the piston.
10. To check the throttle valve, clamp the handle assembly into the vise. Clamp onto
the sides to the handle. Unscrew and remove the throttle valve cap (2459). Remove
the spring (2458), and throttle valve (2456). Replace o-ring (594018) if cracked or torn.
11. The chisel bushing (2418 or 2419) requires a hydraulic press and special tools to
remove and install. Please feel free to return the tool to our Ohio facility to replace this
part.
1. Be sure all parts are clean and free of any abrasive.
2. Clamp the barrel assembly in the vise vertically with the front of tool down. Clamp
onto the flats on the front of the barrel (2423-2426).
3. Slide the piston (2420-2422) into the cylinder bore, (tapered side of piston goes
toward front of tool).
4. Place dowel pins (2433) into the blind holes at the end of the cylinder. (The blind
holes are those that are parallel to the axis of the part. The pins should bottom with a
shoulder in the bottom of the holes.)
5. Slip lower valve block (2429) over pins. (Be sure not to block the ports.)
6. Place the valve spacer (2431) over pins. (Be sure not to block the ports.)
7. Drop a valve (2432) into slot in valve spacer. Apply a few drops of light oil to valve.
8. Slide upper valve block (2430) over pins. (Be sure to align the port holes.)
9. Place filter screen (1350-312) onto top of upper valve block, centered on the block.
9. Screw on handle assembly by hand. Tighten handle using a large wrench.
10. Position tool in vise horizontally. Clamp onto the sides of handle (2465)
11. Slide lock ring (2415) over front of tool and mesh teeth with handle. (Turning the
ring until you find a position where the teeth mesh fully.)
12. Place split rings (2417) next to shoulder opposite lock ring.
13. Expand exhaust deflector (2416) and slide into position between lock ring and split
rings.
14. Install retainer (2427). Install retaining spring (2428) fully into slot of retainer.
Assembly
Note: Use of any parts other then
genuine Top Cat® parts voids any
and all warranties, and may result
in a hazardous situation and a
decrease in operating efficiency.
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