Dynabrade 52672 Operating And Maintenance Manual - Page 6
Browse online or download pdf Operating And Maintenance Manual for Grinder Dynabrade 52672. Dynabrade 52672 8 pages. 1 hp slow speed die grinder 6" extension, governor controlled
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Important: Manufacturer's warranty is void if tool is disassembled before warranty expires.
Please refer to parts breakdown for part identification.
12. Press 02057 Bearing onto rotor and onto 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 onto 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.
Gear Casing Assembly:
1. Install 54520 Bearing into front end of 53695 Gear Casing.
2. Install gears with needle bearings and assemble onto planetary carrier by pressing retainer shafts into place.
3. Place 96498 Wave Spring at the base of 53695 Gear Casing.
4. Slide planetary carrier assembly into 53695 Gear Casing and through 54520 Bearing.
5. Apply one drop of Loctite
®
to threads of 51935 Coupling and thread onto planetary carrier. Torque to 17 N•m (150 lb.-in.).
6. Install ring gear over 54520 Front Motor Bearing, keeping 2 machined slots facing outward.
7. Apply a small amount of Loctite
Important: Align rotor spline into planet gears to allow carrier to spin freely.
8. When slots from ring gear line up with set screw hole. Apply a small amount of Loctite
9. Torque 53695 Gear Casing to 35 N•m (310 lb.-in.).
10. Place 51936 Coupling Insert into 51935 Coupling. Make certain insert radii aligns with radii in coupling base, to correct alignment remove
insert and rotate 90˚.
11. Press one 01007 Bearing on end of 51955 Extension Spindle that is further from the wrench flats, then repeat with second 01007 Bearing
on same end of spindle. Important: While pressing 01007 Bearings, make certain to contact inner race of bearing only.
12. Press 54520 Bearing onto end of spindle that is closer to wrench flats.
Important: While pressing 54520 Bearing, make certain to contact inner race of bearing only.
13. Secure 51955 Extension Spindle and apply Loctite
end to 17 N•m (150 lb.-in.).
14. On double bearing end, apply Loctite
15. Install 51956 Felt Ring over 50011 Collet Body.
16. Install 96512 Retaining Ring into groove inside 51952 Extension Handle.
17. Insert spindle assembly, with 50011 Collet Body first, into larger diameter end of 51952 Extension Handle.
18. Insert 51982 Bearing Spacer into larger diameter end of extension handle.
19. Pull 51936 Coupling Insert half way off of 51935 Coupling.
20. Apply small amount of Loctite
21. Align 51936 Coupling Insert onto 51935 Coupling 51952 Extension Handle.
22. Thread gear casing/housing assembly onto extension handle.
23. Secure front end of housing using 51989 Repair Collar (order separately) or a padded vise, align the vise jaws with machined flat on the silver ring.
Torque 51952 Extension Handle onto gear casing to 35 N•m (310 lb.-in.).
Gear Casing and Extension Assembly Complete.
Housing Assembly:
1. Secure housing using 51989 Repair Collar, (see back cover for Optional Accessories) with collet facing downward.
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 Vale Seat.
3. Install 51944 Tip Valve.
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 place 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 serviced to correct the cause before use.
Assembly Instructions -
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#567 to the male thread of the housing and thread 53695 Gear Casing over ring gear and onto housing.
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243 (or equiv.) to external threads then torque 51935 Coupling on single bearing
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#243 (or equiv.) to external threads and torque 50011 Collet Body to 17 N•m (150 lb.-in.).
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#567 (or equiv.) to external threads just above machined flats on 53695 Gear Casing.
(Continued)
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#567 to 04014 Set Screw and install to lock ring gear in place.
Loctite
®
is a registered trademark of Loctite Corp.