Disassembly/Assembly Instructions - .5 Hp/7°/Front Exhaust
Important: Manufactures warranty is void if tool is disassembled before warranty expires.
Please refer to parts breakdown for part identification.
1.
Secure air tool in a vise equipped with aluminum or bronze jaws.
2.
Remove collet cap and insert.
3.
With an adjustable pin wrench or
50791
Lock Ring Wrench, remove
04087
Lock Ring by turning counter-clockwise. Remove air control
silencer and fabric silencer.
4.
Pull motor assembly from housing.
5.
Reposition motor housing in vise so inlet bushing is pointing up.
6.
Unscrew
01494
Inlet Bushing turning counter-clockwise.
7.
Using needle nose pliers, remove
01468
Spring,
01472
Tip Valve and
01464
Seal.
8.
Resecure housing in vise so throttle lever and
12132
Pin are accessible.
9.
Using a 2.5mm diameter drift pin and a hammer, remove
12132
Pin from housing and remove throttle lever.
10.
Remove
95558
Retaining Ring and push
01469
Speed Regulator from Housing.
Optional:
To disassemble valve body from motor housing, peel back
01558
Collar to expose
01462
Lock Nut. Unscrew lock nut/valve body from housing
(left hand threads).
1.
Remove
50011
Collet Body from rotor shaft by inserting 3/16" hex wrench through collet body and into rotor shaft. Twist collet body from shaft.
2.
Remove
01008
Front Bearing Plate, cylinder, blades (4) and
01149
Spacer from rotor.
Note: 01007
Bearing,
01008
Front Bearing Plate and
01149
Spacer are a slip fit onto rotor.
3.
Press rotor from
01015
Rear Bearing. Press
01015
Bearing from
01014
Rear Bearing plate.
Motor Disassembly Complete.
Important:
Be sure parts are clean and in good repair before assembling.
1.
Place rotor in padded vise with a threaded spindle facing upwards.
2.
Slip
01010
Spacer onto rotor.
3.
Place a .002" shim into
01008
Front Bearing Plate as an initial spacing (
Note: 01121
Shim Pack contains .001" and .002" shims) and slip
01007
Bearing into plate.
4.
Install Bearing/Bearing Plate assembly onto rotor.
5.
Tighten
50011
Collet Body onto rotor (torque to 150 in. - lbs.).
6.
Check clearance between rotor and bearing plate by using a .001" feeler gauge. Clearance should be at .001" to .0015". Adjust clearance by repeating
steps 1-5 with different shim if necessary.
7.
Once proper rotor/gap clearance is achieved, install well lubricated
01011
Blades (4) into rotor slots. Dynabrade Air Lube P/N
95842
is recommended
for lubrication.
8.
Install cylinder over rotor. Be sure air inlet holes of cylinder face away from bearing plate.
9.
Press
01015
Rear Bearing into
01014
Rear Bearing Plate. Press bearing/bearing plate assembly onto rotor. Be sure that pin and air inlet holes line-up with pin
slot and air inlet holes in cylinder.
Important:
Fit must be snug between bearing plates and cylinder. If too tight, rotor will not turn freely. Rotor must then be lightly tapped at press fit end so
it will turn freely while still maintaining a snug fit. A loose fit will not achieve the proper preload of motor bearings.
10.
Secure motor housing in padded vise so motor cavity faces upwards.
11.
Install motor assembly into housing. Be sure motor drops all the way into housing.
12.
Insert air control silencer and fabric silencer into
04087
Lock Ring and install onto motor housing (torque 150 in. - lbs.).
13.
Motor adjustment must now be checked. With motor housing still mounted in vise, pull end of rotor and twist (10-15 lbs. force), rotor should turn
freely without drag. If drag or rub is felt, then increase preload or remove shim. Also, push end of rotor and twist (10-15 lbs. force), rotor should
turn freely without drag. If drag or rub is felt, then deload or add shim.
1.
Insert
01469
Speed Regulator Assembly into valve body. Secure with
95558
Retaining Ring.
2.
Secure valve body in vise with air inlet facing up and throttle lever accessible.
3.
Insert
01464
Seal into housing.
4.
Line-up the hole in the
01449
Valve Stem with the hole in the housing (looking past brass bushing). Using needle nose pliers, insert
01472
Tip Valve so
that the metal pin passes through the hole in the valve stem.
5.
Install
01468
Spring (small end towards the tip valve).
6.
Apply a small amount of #567 Loctite (or equivalent) to threads of
01494
Inlet Bushing and install into valve body (torque 23 N•m 200 lbs. in.).
7.
Install throttle lever and
12132
Pin. Remove valve body from vise.
Tool Assembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important:
Motor should now be tested for proper operation at 90 PSIG. If motor does not operate properly or operates at a higher RPM than marked on
the tool, the tool should be serviced to correct the cause before use.
Note:
Throttle lever is preset at the factory at an 11:00 o’clock position.
Loctite
®
is a registered trademark of Loctite Corp.
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