What type of oil is in the clutch of the CP772H

special gear oil for the clutch plates as they run in oil
get it from a service dealer that handles your make of bike
wrong oil and the clutch will slip , grab or not release

You can run what you do in your motor.

With bike upright, fill to bottom of clutch plates:

http://www.hdforums.com/forum/attachments/primary-transmission-driveline-clutch/24824-how-much-oil-in-the-primary-case-primary-case-oil-level.jpg

Here it is for you. Chicago Pneumatic CP772H Parts List and Diagram T024598 eReplacementPart...

I would definatly drop some oil in it but it sounds like you have a bad o-ring on the throttle.

Hello David?
Motorcycles have what is called wet clutches. The clutch is bathed in the engine oil(crankcase oil ) To ck the adjustment, squeeze the clutch lever enough to take up any slack. There should be at least 1/4 in freeplay. If no free play the clutch will slip. Too much free play and the clutch won't dis-engage.after verifying free play, Take this part with serious thought. Wet clutches do not like motor oil. It causes the clutch to slip. So, If you have changed oil or have added any and it was not motorcycle engine oil, It is more than likely your problem. You will need to drain the oil and filter and put the right type into the engine. The clutch has np separate oil supply. Lever adjustment should be at the clutch lever clamp. Now what is this 50/50? Good Luck-
Ned

The biggest problem I have seen with these is the hammer mechanism.Remove the front of the tool and disassemble hammers.Clean them good with solvent and using a paint brush re coat then with a special hammer grease that can be purchased at a local tool repair and supply store.Also check fwd and reverse seals while you have it apart.Check motor veins for wear.Check inlet screen and exhaust for debris.

1st would be adequate free play-No free play clutch is not fully engaged. 1/4 inch free play needed at clutch lever.

2nd would be oil type. Motor oil is a no no. Wet clutches hate regulat oi. Must use oil specific to the bike. Good luck

Did you do an oil change recently? Sometimes a motor cycles clutch shares the oil with the engine and a different kind of oil then the bike requires will cause the clutch to slip. This happens alot especially if someone switches to some types of synthetic oil when the bike had regular oil before the oil change.

GN4 honda oil

Repair kits, tuneup kits are for sale at;
http://www.hancousa.com/Products/CP/chicago_pneumatic.htm


A detail parts list is at;
http://www.hancousa.com/Products/CP/CP772H_parts.pdf

Another location for tune up kits is;
http://parts4tools.com/store/page5.html