up washer (6), and "O" ring (7). From O.D. of gland
SUBSECTION 12 STEERING CYLINDER
disassemble "O" ring (11) and back up washer (10).
Check action of poppet valve (13).(if used) for leakage.
If not in good condition, replace with new piston
Some cylinders have a shuttle valve Incorporated in the
piston. The shuttle valve is held closed by the hydraulic
fluid force on the piston. At the end of the stroke the
shuttle contacts the end of the cylinder and is pushed
open allowing fluid to flow through the piston preventing
full hydraulic force at the end of the stroke. It acts as an
NOTE: Use only NEW piston rod seal components,
"unloading valve". The shuttle valve will not function as
piston rings and seal for satisfactory overhaul.
an unloading valve is the cylinder is too long for the
Lubricate all seals and "O" rings with light oil before
NOTE: Handle parts with care and have them clean.
Assemble "O" ring (7) to inside of gland (9), then leather
Wash parts in a suitable clean solvent and blow dry with
back up ring (6), steel spacing washer (5), and retaining
washer (3). Assemble seal (4) with sealing lip toward
inside. Assemble retainer washer (3) and secure oil seal
parts with retaining ring (2).
Drain oil from cylinder by moving piston rod in and out
Assemble back up ring (10) on O.D. of gland (9), then
from one extreme end of its travel to the other.
"O" ring (11). To prevent damage to rod seal (4)
assemble gland assembly to the rod (12) from the piston
Remove end plate (1).
end of the rod. Slide gland over rod toward threaded
end of rod.
Remove retaining ring (8). To remove ring (8), push
gland (9) into cylinder barrel (18) approximately 1/4",
Assemble seal (15) in piston ring groove of piston (14)
compress retaining ring (8) with a punch entered through
and piston rings (16) over seal.
knock out hole of cylinder barrel, and remove ring.
Assemble piston (14) to end of rod (12) with nut (17).
Pull on piston rod to remove internal parts from cylinder
Tighten to 60-65 foot pounds torque.
Slide piston (14) into cylinder barrel (18).
Remove gland (9) from piston rod, by sliding off piston
assembly into cylinder half way and slide gland (9) into
end of rod.
cylinder taking care to not damage "O" ring (11) as it
slides past retaining ring groove in end of cylinder.
Remove nut (17). (Hold rod by the two wrench flats
near outer thread end to prevent damage to finish on
Lock gland in place with retaining ring (8) in cylinder
Slide off piston (14) and remove piston rings (16) and
Check for bind by moving piston rod in and out full
With gland removed from rod remove sealing parts in
Assemble end plate (1).
gland by first removing retaining ring (2) then retainer
washer (3), oil seal (4), spacing washer (3), leather back