Lull 6K Service Manual - Manual (Page 603)

Brakes
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 9-29
The version used in latter production is shown in Fig. 9-22. This version
includes a cylinder that is mounted vertically and has 600 pounds of spring
force when the rod is fully extended and 300 pounds of spring force when
the rod is fully retracted. It has a maximum hydraulic extend of 500 psi and
a 2” bore by 2.62” stroke single-acting spring retract.
Inspection
1. Inspection interval is every 100 hours of operation.
2. Check all hydraulic lines and fittings for leaks and damage.
3. Inspect hydraulic cylinder and mechanical linkages for condition and
wear.
4. Check condition of breather port on hydraulic cylinder.
5. Repair or replace items as needed.