Elliott ET850 Series, Operating And Maintenance Instructions Manual

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18
ET850 Pneumatic Rolling Motors
MAINTENANCE INSTRUCTIONS
The ET850-1250 Gear Package Subassembly is a planetary gear set with a stepped planet gear. Slide
gears from the Gear Case, clean, and inspect for wear. Grease gears before reassembly into Gear
Case. To reassemble, ensure marked teeth are aligned opposite each other and match the scribed
lines on the Gear Case. Insert the Gear Package Subassembly into the Motor Case and insert Dowel
Pin.
Ensure adequate lubrication of all parts during reassembly.
Safety Check
After repair or replacement of parts, servicing or prolonged storage, the tool should be checked to
verify that the Directional Valve Subassembly is functioning properly. This test should be completed
without air pressure. With Trip Cover removed, push forward on the Lever Handle. The handle and
valve should move freely and the valve should return to the “OFF” position readily when handle is
released. Then, with handle pushed forward, depress the trip by hand, to simulate reaching preset
torque. The Spindle should move forward to simulate the shut off of air. When pulling the handle back,
the Valve should move into its reverse position before the Spindle inside moves. If the Spindle moves
with the Valve in the forward position, then the motor will engage forward instead of reverse when the
handle is pulled back, which will cause over-rolling of joints.