Assembly Instructions
- (Continued)
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
Please refer to parts breakdown for part identification.
12. Using 96243 Bearing Press Tool (ordered separately) press 02057 Bearing onto rotor and into 51923 Rear Bearing Plate until it is
seated. Important: Cylinder must fit snug between bearing plates. If too tight, rotor will not turn freely. Rotor must be lightly tapped at
press fit end until rotor spins freely while still maintaining a snug fit. A loose fit will not achieve the proper preload on motor bearing.
While pressing 02057 Bearing, make certain to contact inner race of bearing only.
13. Add one drop of Loctite
®
243 (or equiv.) to governor assembly male thread and screw governor assembly into place (LEFT HAND
thread) with a slotted screw head. Torque to 2 N•m (18 lb.-in.).
14. Install motor assembly into housing, making sure motor drops all the way into housing. Note: Align both 96445 Coiled Pins to slots in
insert and against 51924 Gasket.
15. Insert 95438 O-Ring onto 53620 Adapter and slide adapter into housing and over 54520 Bearing.
16. Place 96498 Wave Spring onto 53620 Adapter.
Note: On double planetary models, the ring gear replaces 53620 Adapter, 95438 O-Ring, and 96498 Wave Spring is installed in the
gear casing assembly.
Motor Assembly Complete.
Gear Casing Assembly:
1. Press Front 02552 Bearing onto front end of planetary carrier.
2. Apply one drop of Loctite
®
#243 to threads of 04032 Spindle Nut and thread onto planetary carrier. Torque to 17 N•m (150 lb.-in.).
3. Install gears with needle bearings and assemble onto planetary carrier using 53182 Gear Shafts.
4. Slip ring gear over carrier and gears, making sure notches face away from spindle nut.
5. Press 02552 Bearing onto rear of planetary carrier.
6. Slide planetary carrier assembly into gear casing. Align the ring gear notch with the set screw hole(s) and grease fitting(s).
7. Install 04014 Set Screw(s). Apply a small amount of Loctite
®
#567 to the threads before installing.
Note: On double planetary models, install needle bearings into planetary gear and slide 53678 Gear Shaft through planetary gear. Press
53678 Gear Shaft into planetary carrier holes. Place 96498 Wave Spring over pinion spline. Press 02552 Bearing over pinion spline,
trapping 96498 Wave Spring between 02552 Bearing and gears. Slide counter bored end of ring rear into tool housing and over 54520
Bearing of motor assembly. Install planetary gear assembly into 53694 Gear Casing. Align ring gear slot with set screw hole. Apply a
small amount of Loctite
®
#567 to the male thread of the housing and thread gear casing onto housing. Note: While threading on 53694
Gear Casing, place 04014 Set Screw with a small amount of Loctite
®
#567 on the male thread, and install once ring gear slot is aligned.
Torque gear casing to 35 N•m (310 lb.-in.).
Important: Align rotor spline to planetary gears and carefully thread gear casing onto housing making sure the output shaft turns freely.
8. Apply a small amount of Loctite
®
#567 Loctite to the male thread of the housing and thread gear casing onto housing.
Torque to 35 N•m (310 lb.-in.).
Important: Align rotor spline to planetary gears and carefully thread gear casing onto housing making sure the output shaft turns freely.
9. Thread arbor assembly onto spindle. Torque to 17 N•m (150 lb.-in.).
Gear Casing Assembly Complete.
Housing Assembly:
1. Secure housing using 51989 Repair Collar (see back cover for Optional Accessories) with inlet facing upward.
2. Install 51945 Valve Seat by aligning 3 male prongs with three deep slots on insert. Make certain valve seat is pressed flat against
base of pocket.
Note: Add a few drops of Dynabrade Air Lube (P/N 95842) to pocket walls before inserting 51945 Valve Seat.
3. Install 51944 Tip Valve as shown.
4. Slide 51942 Baffle into housing long end in first, and place 51941 Spring into shallow wall end of baffle.
5. Pre-assemble 51937 Inlet Bushing by sliding 51939 Silencer Plate, 51940 Spacer over male thread and set 96442 O-Ring into groove at
the base of thread. Slide 51943 Spring into bushing and up to the two 51938 Screens.
6. Apply one drop of Loctite
®
#243 (or equiv.) to 51937 Inlet Bushing thread.
7. Align small inside diameter of 51943 Spring to cone point on 51944 Tip Valve and thread 51937 Inlet Bushing and sub-assembly into
place. Torque bushing to 35 N•m (310 lb.-in.).
8. Slide 96443 O-Ring onto 51946 Valve Stem and slide sub-assembly until o-ring passes through housing hole. Make certain valve stem
assembly slides freely after the o-ring passes through the hole.
9. Remove housing from 51989 Repair Collar and replace repair collar onto the bench top with the part number identifier against the bench.
Align the throttle lever holes to housing pin hole and rest the housing and throttle lever onto the legs of the repair collar. Press 96444
Coiled Pin into lever hole and center into housing.
Tool Assembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important: Before operating, place 2-3 drops of Dynabrade Air Lube (P/N 95842) directly into inlet with throttle lever depressed. Operate
tool for 30 seconds to allow Air Lube to properly lubricate internal motor components. Motor should now be tested for proper operation at 90
PSIG max. If tool operates at a higher RPM than marked on the tool or if vibration and sound levels seem abnormal, the tool should be serv-
iced to correct the cause before use.
Loctite
®
is a registered trademark of Loctite Corp.
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
