6
-
If inspection indicates a buildup of dust inside the cover, this build up may be removed by blowing compressed air
through the air slots.
-
If excessive brush sparking is observed through the air inlet slots, switch the machine off immediately to avoid
serious damage which can occur with prolonged operation.
LUBRICATION
Input a few drops of oil daily through the air inlet fitting with any industry approved air tool lubricant. Suitable oil is N
FO’s Air
Lube (10W/NR) or equivalent light machine oil (10W). A suitable air line filter and an in line lubricator are also strongly
recommended.
The drive R/A Air Motor Drive Case should be check for oil level at the filler screw oil port. A few drops of dear lube must be
added daily for satisfactory trouble free operation. A sample of the gear lube recommended is included and can be obtained
as Castrol AW-68, Dryden EP-68#2, or equivalent.
SECTION IV
ASSEMBLY AND DISMANTLING
The tool consists of three assemblies, the right angle drive air motor, and the shroud assembly. Normal maintenance
operation will require periodic inspection, lubrication and cleaning of the components. The right angle drive air motor
requires only periodic inspection. Lubrication as recommended for air motor. If a problem occurs during the warranty period,
the drive assembly should be returned for warranty inspection for repair or replacement.
DRIVE AIR MOTOR INSPECTION AND REPAIR
In the event that the Right Angle Drive Air Motor is beyond warranty (1 year) and the user wishes to recondition the Air Drive
Motor, the following steps should be taken to inspect and recondition the unit, if not returned to
Novatek
for service.
WARNING
Following reconditions of Right Angle Drive Air Motor it is critical to insure the no load speed of the
motor is approximately 5500 RPM +/- 100 RPM. Over or under torque of the air motor assembly will result in
deviations of rotational speeds. The no load speed must be checked following assembly each time the abrasive is
secured to the locking position.
A. Release the locking screw on back flange and unscrew using pink key and end wrench.
B. Place tool in vice, clamping across flats on throttle housing, unscrew lock ring. (Note: Left hand thread on angle
head casting, right hand thread on motor housing.)
C. Pull motor assembly out and unscrew throttle assembly from motor housing, ease out rear spacer, coupling and
front spacer.
D. To disassemble the motor, grip rotor spines in soft jaws of vice and unscrew nut for RA5 (left hand thread).
E. Displace cylinder to one side and insert stripped block between bearing housings.
F.
Using stripper plate, pass rear bearing housing into hole “A” so that the edge of the cylinder lodges on one side
and the stripper block on the other.
G.
Push rotor through from splined end. Pass rotor through hole “B” and press out from rear bearing housing.
H.
Remove space and vanes. To remove bearing from housings, place over hole “B” and push out with punch.
I.
To disassemble the angle head assembly, grip casting in soft jaws, unscrew bearing housing and withdraw whole
spindle assembly unit.
J.
Remove circlip. Remove bearing by sliding into slot “E” in stripper plate, support stripper plate either side of bearing
and press out.
K. Slide off circlip. Press off gear wheel and ease out woodruff key.
L. Press out spindle by placing blocks either side of bearing housing with thread in downward position.
M. Turn bearing housing over and press out bearing with punch.
N. The throttle unit can be disassembled by removing plug, O-ring and valve spring.
O. Withdraw valve stem and O-ring and with suitable punch, tap out lever pin and remove throttle lever.
NOTE: Stripping Tool Kit (part no. RPTA529) should be ordered and available prior to disassembly of the Air Drive
Motor. These special stripping or disassembly tools along with the following instructions are supplied for
customers who wish to carry out their own repairs. These repairs should only be undertaken if trained personnel
and approved speed testing equipment are available.
AIR POWERED UNITS
Summary of Contents for SRAT5A
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