Routine Maintenance Overview Checklist
318 Load Unit Maintenance
85
4. Use the Lock Control to lock the crosshead. Then torque the manual
crosshead locking bolts in the order shown in the following illustration.
5. Turn off hydraulic pressure.
6. Use the Lock Control to the unlock crosshead position to remove pressure
from the hydraulic locks. Wait two minutes for the pressure in the locks to
drop to zero before going on to the next step.
7. Tighten each lock’s cap screw until its piston bottoms out. Then loosen and
hand-tighten each cap screw.
8. Loosen each of the hydraulic locks’ cap screws 1/4 turn.
9. Turn on electrical power at the test controller if you have not already done
so.
10. Reset any active interlocks at the test controller.
11. Turn on high hydraulic pressure.
12. Return the Lock Control to the lock crosshead position to pressurize the
hydraulic locks.
13. Fully loosen the manual crosshead locking bolts. Then turn the Lock
Control to the unlock crosshead position.
Tighten
Bottom out
position
Loosen, then
hand tighten
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