Disassembly/Assembly Instructions
(continued)
Spindle Disassembly:
1. Remove the (5) 95897 Cap Screws from the retainer.
2. Remove the 52091 Retainer.
3. Grip onto the spindle and pull evenly away from housing.
4. Remove 52089 Washer, 52147 Spacer and 50412 Felt Ring.
5. Secure 52131 Spindle into vise using wrench flats and remove 52118 Spindle Nut (right hand thread).
6. Remove 50505 Bearing.
7. Secure bevel gear into a soft jaw vise and press spindle through the gear.
8. Remove 02649 Bearing by pressing the 50497 Bearing Washer through the housing.
Note: Replace by pressing on outside diameter of the bearing.
Motor Reassembly:
Important: Be certain all parts are cleaned, properly greased and in good repair before reassembly.
1. Slide 52136 Front Bearing Plate with 52130 Front Bearing in place onto 07108 Rotor (see step 4).
2. Place 50509 Key onto rotor shaft.
3. Press bevel pinion into place. Secure 95998 Ring in place.
4. Place the correct number of shims from the 52141 Shim Pack between the front bearing and front bearing plate to achieve a .0015 inch spacing between
the front bearing plate and 07108 Rotor when forward pressure is applied to both the bearing plate and the rotor toward the bevel pinion.
5. Place the blades into rotor slots.
Note: Blades should be lightly lubricated with Dynabrade Air Lube P/N 95842 (or equivalent) before installation in rotor slots.
6. Place cylinder over rotor and blade assembly.
7. Place the 52140 Rear Bearing Plate (with 01266 Bearing pressed into place) over the rotor shaft and line-up short pin on cylinder with the small hole in the
rear plate and press into place.
8. Place the bevel pinion into a soft jaw vise and tighten the governor assembly (52171 Governor Cage) to 9.0 N•m (80 lb. in.) (left hand thread).
9. Place complete motor assembly into housing.
10. Tighten 02626 Adjustment Bushing into 52090 Adapter to 50 N•m (450 lb. in.). Add 2 drops of #271 loctite or equivalent to threads of bushing
before tightening.
11. Tighten 52123 Adapter into housing with 39.5 N•m (350 lb. in.).
12. Secure inlet bushing into vise. Replace 02631 Nut and 01746 O-Ring. Swivel 07141 Valve Body to desired throttle lever position. Tighten 02631 Nut to
45 N•m (400 lb. in).
13. Unroll 07136 Grip back into place.
Spindle Reassembly:
1. Press bevel gear into place on 52131 Spindle.
2. Press 50505 Bearing up against shoulder.
3. Tighten 52118 Spindle Nut to 34 N•m (300 lb. in.).
4. Place 52147 Spacer up against the bearing.
5. Mount 50412 Felt Ring over spindle nut and down inside 52147 Spacer.
6. Place 52089 Washer with the deeper counter bore toward the felt ring.
7. Slide the spindle assembly down into the housing lining up the small end of the spindle into the 02649 Bearing.
8. Place the correct number of shims from the 52148 Shim Pack checking for backlash (back and forth clearance in the gear teeth while pressing down
into the housing).
Note: Minimal backlash of the gear set is recommended.
9. Replace retainer. Line up 5 hole pattern and secure with (5) 95897 Screws.
Note: Always check tool RPM before mounting any wheel, disc or accessory with a tachometer while maintaining 90 PSI at the tool inlet under a no load
condition. If tool is operating at a higher speed than the RPM marked on the tool, the tool should be serviced to correct the cause before use.
Tool assembly is complete.
Important:
The regular maintenance of any air tool will contribute to greater efficiency of tool and will prolong tool life. The failure of quality pneumatic air motors can most
often be traced to an unclean air supply or the lack of lubrication. Air pressure easily forces dirt or water contained in the air supply into motor bearings
causing early failure. It often scores the cylinder walls and the rotor blades resulting in limited efficiency and power. Frequent drainage of water traps in air
lines is recommended. Each tool on each drop should also be equipped with a secondary air processing unit.This consists of an in-line Filter-Regulator-
Lubricator. All Dynabrade air tools must be used with a Filter-Regulator-Lubricator to maintain all warranties. Our warranty
obligation is contingent upon proper use of our tools and cannot apply to equipment which has been subject to misuse such
as unclean air, wet air or a lack of lubrication during the use of the tool.
Loctite® is a registered trademark of the Loctite Corp.
DYNABRADE, INC.,
8989 Sheridan Drive
•
Clarence, NY 14031-1490
•
Phone: (716) 631-0100
•
Fax: 716-631-2073
•
International Fax: 716-631-2524
DYNABRADE EUROPE S.àr.l.,
Zone Artisanale
•
L-5485 Wormeldange—Haut, Luxembourg
•
Telephone: 352 76 84 94
•
Fax: 352 76 84 95
© DYNABRADE, INC., 1996
PRINTED IN USA
DYNABRADE
®
