MTS Series 311 Load Frame - Manual (Page 53)

Cleaning the Columns
Series 311 Load Frame Maintenance 53
Cleaning the Columns
The crosshead locks can not securely clamp the crosshead to dirty or greasy
columns. You will need #1 grade kerosene, mineral spirits, or equivalent
petroleum-based solvent and lint-free cloths to perform this procedure.
The crosshead can slide down the columns.
Crosshead cleaning takes place in a crush zone where pinched fingers and
crushed hands can occur.
Do not position yourself in a crush zone. Always lock the crosshead after moving
it. Always turn off hydraulic pressure before cleaning the columns. Wait two
minutes for pressure to bleed off before starting work.
1. Ensure that the crosshead is locked.
2. Using a clean, lint-free cloth, clean the exposed surfaces of the columns
with #1 grade kerosene (or equivalent).
3. Turn on the system electrical power.
4. Apply high hydraulic pressure to the load frame.
5. If there is a specimen in the load frame, remove it.
6. Unclamp the crosshead and move it to expose the uncleaned section of the
columns.
7. Clamp the crosshead.
8. Turn the hydraulic pressure to the load frame off. Wait two minutes for the
pressure to bleed off before going on to the next step.
9. Clean the remaining sections of the columns.
CAUTION