Michigan Pneumatic Tool 750SS Series, Manual

Page: 25 / 28

25
Troubleshooting
Trouble Possible Cause
Solution
Low Power Restriction in Air Strainer
Screen /Muffler
Remove Inlet Bushing, Air Stainer Screen, and
Muffler. Clean with a suitable solvent in a well
ventilated work space. Replace Inlet Bushing, Air
Stainer Screen, and Muffler.
Low Power Worn and/or broken
Vanes
Remove the Motor Assembly. Discard the Vanes and
replace ALL SEVEN Vanes with new ones.
Low Power Worn/damaged Cylinder
Remove Motor Assembly. Inspect the inner diameter
of the Cylinder. If there is any scoring or a wear
marks, replace with a new one.
Low Power Debris in Motor
Assembly/Motor Housing
Completely disassemble tool. Clean all parts with
a suitable solvent in a well ventilated work space.
Reassemble tool using a Tune Up Kit (750SS-TK2).
Motor will not run Reverse Valve installed
incorrectly.
Remove the Back Cap. Remove the Reverse Valve and
turn 180 degrees. Re-install Reverse Valve and Back
Cap (see Assembly of the Reverse Valve, page 22).
Motor will not run Swollen Vanes
Remove the Motor Assembly. Discard the Vanes and
replace ALL SEVEN Vanes with new ones.
Motor will not run Motor is assembled
incorrectly
Remove Motor Assembly. Inspect the parts to be
sure they are installed correctly (see Assembly of the
Motor, page 21).
Motor runs
without actuating
Trigger
Worn Throttle Valve/
Throttle Valve Seat
Replace the Throttle Vave Seat and Throttle Valve
(see Assembly of the Motor Housing, page 20).
Tool runs, but will
not impact
Lack of grease in the
Impact Mechanism.
Inject 4-5 cc of grease into the grease fitting.
Tool runs, but will
not impact
Broken and/or worn
Impact Mechanism parts
Remove the Hammer Case and inspect all parts in
the Impact Mechanism. Replace all worn/and or
broken parts.
Tool runs, but will
not impact
Impact Mechanism not
assembled correctly
Remove the Hammer Case and inspect all parts in
the Impact Mechanism. Inspect the parts to be sure
they are installed correctly. Pay particular attention
to the orientation of the Hammers (see figure 23.1).
Tool is locked up Hammer Case Bushing
not installed correctly
Remove the Hammer Case. Using an arbor press, be
sure that the Hammer Case Bushing is pressed all of
the way into the Hammer Case until it bottoms out.