11. Remove 5 blades (400-6), rotor (400-5) and key (400-10).
12. Remove front endplate (400-7).
13. Remove snap ring (400-46) from spindle with snap ring pliers.
13. Support the spindle assembly vertically on a suitable drill block. Press spindle
through front bearing (400-G-11) with an arbor press.
14. To check throttle valve unscrew throttle valve cap (869311).
15. Lift out valve spring (400-G-34) and throttle valve (400-G-29). Remove and replace
o-ring (844302) if cracked or worn.
Assembly
1. Be sure that all parts are clean and free of any abrasive.
2. Support bearing (400-G-11) on a suitable drill block.
3. Press spindle (400-G-14-TS) through bearing until it bottoms on shoulder.
4. Place retaining ring (400-46) into groove in spindle.
5. Slide front endplate (400-7) over spindle and onto front bearing.
6. Place key (400-10) into keyway in spindle.
7. Slide rotor (400-5) over spindle.
8. Place 5 blades (400-6) into slots.
9. Slip cylinder (400-2G) over rotor. (be sure the alignment pin is oriented away from
the front for the motor assembly.
10. Install rear endplate (404-19) locating cylinder pin in smaller hole of the rear
endplate.
11. Place bearing (404-9) in rear endplate. Tap in place with bearing driver (1100-803).
12. Place snap ring (592016) in spindle groove.
13. Place o-ring (594016), washer (404-38) and snap ring (404-39) into rear of end
plate.
13. Secure motor housing (402-132[A][S][AS]) in vise vertically with output of tool
toward upward direction. Clamp onto the flats toward the rear of the motor housing
14. Place o-ring (400-51), exhaust screen (402-134) and exhaust deflector (410-G-17-
S) onto motor housing.
15. Slide front motor assembly into motor housing. Install motor retainer (410-S-38-S)
and tighten.
16. Check the operating speed with a reliable tachometer. The speed must be at
or below the stamped speed on the tool.
17. Install all required guards and safety devices before returning tool to service.
