SkyTrak 6042 Service Manual - Manual (Page 311)

8.79 Model 6042 Legacy Origin 7/02
Hydraulic System
Disassemble the Extend/Retract Section
1. Carefully separate the extend/retract section
(Fig. 8-43, 32) from the mid-inlet/outlet section (53).
Avoid dislodging or losing the shuttle (52) from the
mid-inlet/outlet section.
2. Remove the o-ring (Fig. 8-43, 54) from between the
two sections.
3. Remove the shuttle (Fig. 8 -43, 33), spring (34) and
poppet (35) from the extend/retract section.
4. Remove the two socket head capscrews (Fig. 8-43, 37)
securing the cable retainer assembly (38) to the extend/
retract section (32).
5. Remove the retainer (Fig. 8 -43, 39), both
sleeves (40), another retainer (39), wiper (41) and
o-ring (42) from the cable retainer assembly (38).
6. Remove both socket head capscrews (Fig. 8-43, 43)
securing the end mechanism (44) to the extend/
retract section (32).
7. Remove the spool cap (Fig. 8 -43, 45), retainer (39),
spool end (46), spring seat (47), spring (48), another
spring seat (49), wiper (50) and o-ring (51) from the
end mechanism (44).
Disassemble the Mid-Inlet/Outlet Section
1. Remove the shuttle (Fig. 8-45, 72) from the mid-
inlet/outlet section (73).
2. Remove the shut-off plug (Fig. 8-45, 75).
3. Remove the remaining plugs (Fig. 8-45, 76, 78 and
80) and o-rings (77, 79 and 81).
d. Main Control Valve Parts Cleaning
Clean all components with a suitable cleaner, such as
triclorethylene, before continuing; blow dry.
e. Main Control Valve Parts Inspection
Inspect all parts and internal passageways for wear,
damage, etc. If inner surfaces of any component DO NOT
display an ultra-smooth, polished finish, or are damaged
in any way, replace the damaged part. Often, dirty
hydraulic fluid causes failure of internal seals, damage to
the polished surfaces within the component, and wear of
and/or harm to other parts.