MTS Series 322 Load Frames - Manual (Page 74)

Series 322 Load Unit 74 Maintenance
Load Unit: Lubricate the Crosshead Locking Bolts
Lubricate the locking bolts in a manually locked crosshead whenever they begin
to be hard to tighten or sticky when loosened.
1. Remove the covers on the ends of the crosshead. The crosshead covers must
be removed to lubricate the crosshead locking bolts. Four 1/4-20 screws
(two top, two bottom) on each cover need 5/21 hex (not included). Hand
tighten when reinstalling the covers.
2. Position the crosshead at a comfortable working height.
3. Lock the crosshead following your normal crosshead locking procedure.
4. Remove a single locking bolt.
5. Clean the bolt threads with a stiff nylon brush. Use degreaser if necessary.
Dry the threads.
Then lightly lubricate the threads with Molykote G-n paste.
6. Reinstall the locking bolt, tightening it to a value specified in the following
table.
7. Repeat Steps 4, 5, and 6 until all the bolts have been lubricated.
L OAD U NIT R ATING T ORQUE
100 kN (22 kip) 190 N·m (140 lbf·ft)
250 kN (55 kip) 271 N·m (200 lbf·ft)
500 kN (110 kip) 271 N·m (200 lbf·ft)
Unscrew one
at a time
Clean and
lubricate