Never disconnect hydraulic lines or fittings before venting pressure. Turn dipstick cap 1/4 turn
to safety notch to relieve pressure. Failure to follow this warning may result in serious injury
or death to personnel.
Cool bushings to -320°F (-195°C) by submerging bushings in liquid nitrogen.
If removed, submerge four bushings (Figure 8, Item 1), in liquid nitrogen to cool them. Apply threadlock sealant
and install four bushings.
Rod seal is installed with open end and lips toward the interior of cylinder. Rod wiper is
installed with lip toward the outside of cylinder. Use care to avoid nicking or scratching seal
lips. Failure to follow this caution may result in damage to equipment.
Coat all internal parts with clean hydraulic oil before assembling.
Install new rod seal (Figure 9, Item 4) and new rod wiper (Figure 9, Item 5) inside gland (Figure 9, Item 3).
Install new back-up ring (Figure 9, Item 2) and new o-ring (Figure 9, Item 1) on outside
diameter of gland (Figure 9, Item 3).
Figure 9. Boom Hoist Cylinder Assembly.