October 2006
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2
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Disassembly and Reassembly of the Cam Casing
Disassembly
1.
Remove the Rod Guide Bolts and Rod Guide Nuts.
2.
Remove the Rod Guides, Ratchet, Checker, Springs, and Rod Plate Spring.
3.
Remove the Cam Casing from the tool (left-hand thread).
•
On the URW-6, you must loosen the Gear Casing Lock Nut first and then remove the Connector, Cam,
Bearing, Spacer, Thrust Washers, and Thrust Bearing.
•
On the URW-8N & 9N, over-tightening the Handle Nut will keep the Casing from turning.
4.
Remove the Operating Rod, Cam Roller, Cam Roller Pin, Cam Roller Push Pin(s), and Spring(s).
5.
Thoroughly clean all parts.
Inspection of Parts for Wear
1.
Rod Guides:
The Ratchet should turn freely in the Rod Guides but should not move from side to side;
replace as needed.
2.
Ratchet and Checker:
The teeth should come to a point; replace if they are rounded off. The flats inside
of the Ratchet should not be pitted or grooved; replace as needed.
3.
Operating Rod:
The end of the Rod that contacts the Ratchet should come to a point; replace if it’s
rounded.
4.
Cam Roller and Cam Roller Pin:
The Cam Roller should be round and smooth; replace if it has flat spots
and pitting. The Cam Roller Pin should be inspected for shininess and grooving; replace as needed.
5.
Rod Plate Spring:
Inspect the Rod Plate Spring for cracks and wear from the Operating Rod; replace as
needed.
6.
Springs:
Check for the correct dimension of the Spring; replace as needed.
Reassembly
1. Install the Cam Roller Push Pin(s) and Spring(s) into the Cam Casing. Put a light coat of grease on both
parts.
2. Install the Cam Roller and the Cam Roller Pin into the Operating Rod. Now install the Operating Rod into
the Cam Casing making sure that the Cam Roller Push Pin gets under the Cam Roller Pin. Put a light coat
of grease on all parts.
3. Put a light coat of grease on the Operating Rod and install the Rod Plate Spring.
4. Install the Springs and Checker onto the Cam Casing.
5. Install the Ratchet and Rod Guides being sure to line up the slot in the Rod Guide with the notch on the
Checker. Install the Rod Guide Bolts and Nuts and tighten.
6. When installing the Cam Casing Assembly back onto the Gear Casing, the Cam Casing Assembly will have
to be shimmed to adjust the Operating Rod to the Ratchet.
