e.
Slide head (11) over end of piston rod (7), then install stop tube (5) and piston (4). Install nut (1).
f.
Insert the piston rod (7) assembly into the outer rod (19) and screw head (11) into outer rod.
4-17 MAINTENANCE OF HYDRAULIC BREAKOUT ASSEMBLY
4-17.1 Breakout Tong (Figure 4-40A).
4-17.1.1 Removal and Disassembly.
a.
Unhook the spring (5); then remove the tong assembly (6) by removing the outermost cotter pin (1) and drive pin
(2). Remove the tong links (3 and 4) by removing the other two cotter pins (1) and drive pins (2).
b.
By removing the four drive pins (7), you totally disassemble the tong assembly, except for the tong dies (11 and
13). Remove the dies by tapping up and sliding the dies out.
4-17.1.2 Cleaning and Repair.
Clean all parts with an approved cleaning solvent. Replace any part that is extremely worn or which is damaged
in such a way that the tongs do not function freely. The tong dies (11 and 13) teeth need frequent cleaning and
are also subject to wear during normal operation. The dies will need to be replaced frequently.
4-17.1.3 Assembly.
a.
Install the tong dies (11 and 13). Position the tong components as shown in the illustration, and attach the latch
(8) and jaws (10, 12, 14) to the arm by inserting the drive pins (7). Replace the latch spring (9).
b.
Assemble the tong assembly (6) and tong links (3 and 4) and insert the drive pins (2) and cotter pins (1). Install
the counterbalance spring (5).
4-17.2 Breakout Cylinder (Figure 4-41).
4-17.2.1 Removal and Disassembly.
a.
Disconnect hydraulic hoses. Remove cotter and clevis pins (1) from both ends. Remove the cylinder assembly.
b.
Remove the set screw (2) and ball (3). Unscrew the clevis (4) from the piston rod.
c.
Remove the nuts (5) and rod guides (9). Slide rod guide (6) from the tube (13) and off the piston rod. Remove
wiper (7) from the outside of the rod guide and remove seal (10), backup washer (11), and packing (12) from
inside the rod guide.
d.
Remove the bottom clevis (8) from the end of the tube. Remove backup washer (11) and packing (12) from the
clevis.
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