Cherry Aerospace G-689, Оригинальное руководство пользователя

Страница: 9 / 16

7
Upon re-assembly, reverse the above procedures. Be sure to install O-rings and back-up rings using seal guides, where
appropriate, to avoid cutting them. Always lubricate all O-rings. Just before placing the head sub-assembly onto the
handle, see Fill and Bleed Instructions.
•
Insert release piston sub-assembly (28) into rear cap (29), making sure index pin in release piston sub-assembly
(28) drops into recess in rear cap (29).
•
Insert shift screw (26) into the release piston sub-assembly (28). Slip index washer (32) onto button head cap
screw (33). Engage threads of button head cap screw (33) with shift screw (26) and firmly tighten. Then turn
button head cap screw (33) counterclockwise to retract shift stop (22) fully into release piston (26). Ensure that the
hex of the shift stop (22) is aligned with the hex of the release piston sub-assembly (28).
•
Install piston cap (8) onto piston (14), threading seal guide tool (680A114) on piston (14) to avoid damaging the O-
rings as piston cap (8) is threaded into place.
•
Hold shift piston (24) using the large hole in clamp wrench (680A48/49), being careful not to mar the smoothly
ground surfaces of the piston. Insert piston spring (23), and while compressing it, turn piston cap
sub-assembly (8 and 14) into place with clamp wrench (680A48/49) and firmly tighten.
•
Insert shift piston assembly (24) into front of head cylinder (13) and thread on rear cap (29). Insert the four piston
stops (7), choosing every other hole. Thread on front end cap (3). Place head assembly in smooth jawed
vise, clamping on hex of rear cap (29), with front end cap (3) upward. Using the end cap socket wrench (680A173)
and a handle extension, tighten front end cap (3) to 150-180 ft.-lbs. (203 to 244 Nm) torque.
•
Replace adjuster ring (35), socket head cap screw (34), adjuster knob (36), and then the other socket head cap
screw (34) onto the back of the rear cap (29).
•
Just before placing the head sub-assembly onto the handle, see Fill and Bleed Instructions. Also make sure to
place O-rings (40) on top of adapter (86), O-ring (87) and gasket (88) on the top of the handle, and that they are
properly oriented.
•
Tighten the five socket head cap screws (89) and one socket head cap screw (90) uniformly to prevent leakage
around the gasket. Be sure screw (90) is in the rear center hole.
•
Purge system of air using Cherry air bleeder (700A77) according to Fill and Bleed instructions.
H A N D L E S U B - A S S E M B L Y
For complete disassembly, disconnect tool from air line then use the following procedures.
•
Hold the tool upright and remove five socket head cap screws (89) and one (90) using a 5/32 hex key. As adapter
(86) is removed, hold upper portion of tool over a pan to catch oil which will run out. Drain oil from head and inside
of handle. Dispose of oil according to environmental regulations.
•
Remove gasket (88) and O-ring (87).
•
Remove six flat head screws (58) from base using a 3/16” hex key, and, using a screwdriver, carefully pry handle
base (57) out of handle (61). Remove spacer (54) and gaskets (53).
•
With the tool upright, remove retaining ring (62) from the top of the power cylinder (63). Use piston rod wrench
(530A86) to push power piston and rod sub-assembly (92) down.
•
Turn the tool upside down. The cotter pin (51) should now be accessible. Remove the cotter pin (51) and engage
the top of the power piston and rod sub-assembly (92) with piston rod wrench (530A86) and remove slotted nut
(50) using a 9/16" wrench. Unscrew power piston and rod sub-assembly (92) until it disengages from the air piston
(49).
•
Insert threaded end of power cylinder tool (530A88) into bottom of air piston (49). Using this as a handle, pull air
piston out of the bottom of the tool.
•
Thread seal guide (530A81) onto the end of power piston and rod sub-assembly (92) and push out through top.
•
Using packing plug wrench (530A83-3) together with a 1-1/4" socket wrench, remove packing plug (46) and lift out
the exposed O-Ring (45).
•
Insert power cylinder tool (530A88) into top end of power cylinder (63) and force power cylinder with O-rings (64)
out the bottom of the tool.