M977, M985, and M984E1 Crane Maintenance Instructions (Cont)
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful
vapors, and are harmful to skin and clothing. To avoid injury or death, keep away
from open fire and use in well-ventilated area. If adhesive, solvent, or sealing
compound gets on skin or clothing, wash immediately with soap and water.
Clean all metal parts in dry cleaning solvent.
Inspect each part for damage.
Replace damaged parts.
Inspect inner stator for thickness. If stator is under 0.225 in. (5.71 mm), replace stator.
Inspect outer stator for thickness. If stator is under 0.118 in. (2.99 mm), replace stator.
Inspect disc thickness. If disc is under 0.210 in. (5.33 mm), replace disc.
Inspect spring for length. If length is under 0.938 in. (23.8 mm), replace spring.
Install packing retainer (1) and
preformed packing (2) in cylinder
Install packing retainer (4) and
preformed packing (5) on cylinder
Install piston brake (6) in cylinder
Install preformed packing (7) and
packing retainer (8) on piston brake (6).
Leave one hole empty between every two springs.
(5) Install piston brake (4) and six springs (9) in cylinder
(6) Apply pipe sealing compound, and install elbow (11).