Thomas ProTough 300 Screener, Owner'S/Operator'S Manual

Page: 37 / 73

71 70
6. REPLACEMENT SCREENS
Screen Selection and Tips ........................................6.1
Application ......................................................6.1A
Selection ..........................................................6.1B
Tips ..................................................................6.1C
Ordering Information ......................................6.1D
Replacement Screen Information ..............................6.2
Bolt Assembly Torque (ft-lb)
The torque values in the table are based on the use of lubricated threads.
Size (mm) Grade 8.8 Iron Grade 10.9 Iron Grade 12.9 Iron Aluminum
6 5 10 9 4
7 9 14 18 7
8 17 25 29 14
10 33 50 50 25
12 60 85 95 40
14 90 133 145 65
16 140 200 210 100
18 200 285 290 135
20 290 400
Standard Metric Bolt Dimensions and Grades
Metric - M8 - 1.25 x 25
M8 - 1.25 x 25
Major thread diameter in millimeters
Distance between threads in millimeters
Length in millimeters
Grade markings
8.8 10.9 12.9
5.3 FASTENER TORQUE SPECIFICATIONS
Metric Bolt Markings and Torque Values
5. SPECIFICATIONS
Note:
*Tighten gradually in 3 steps: 245, 272, 306 (180, 200, 225)
**Tighten to specification. Start engine. Engage shaker. If screens rattle on frame,
shut off engine and tighten additional 7 Nm (5 lbs./ ft.) increments until they no longer
rattle on frame.
***Tighten as necessary to close gap and clamp tightly to shaker shaft. Remove
and discard bolt, lock washer and nut. Replace with new hardware and tighten to speci-
fication.