SkyTrak 6036 Service Manual - Manual (Page 229)

Section 9 Hydraulic System
Model 6036/6036T S/N 9B0500 thru 14833 9-79
f. Assembly of Control Valve Sections
NOTE: Whenever a control valve has been
disassembled, it will be necessary to replace the
seal plates used between the sections. This valve
requires three (3) seal plate kits (5, Fig. 9.44) to
assemble the valve after service.
1. Lay the inlet section (8) down and install the
tie rods (3) vertically into the section. Hand
tighten until each rod bottoms out in the
threaded hole.
2. Open one seal plate kit (5) and verify the parts
included: seven (7) O-rings, one (1) shuttle
ball and one (1) seal plate.
NOTE: DO NOT use a shuttle ball between the
inlet and raise/lower sections nor between the
outlet and extend/retract sections.
3. Be sure the surface of the inlet section and the
seal plate are clean and free of foreign mate-
rial. Place the seal plate over the tie rods and
onto the inlet section. Install all O-rings except
the large elongated one.
4. Using “white lithium” grease, brush a thin layer
over the elongated O-ring groove and insert
the large O-ring so that it adheres to all sides
of the O-ring groove. A blunt tool may be
required for this procedure.
5. Verify that all mating surfaces of raise/lower
working section are clean and free of foreign
material. Slide working section (7) over the tie
rods taking care not to damage the surface of
the working section.
6. Open a second seal plate kit (5) and verify the
parts included: seven (7) O-rings, one (1)
shuttle ball and one (1) seal plate.
NOTE: DO NOT use a shuttle ball between the
inlet and raise/lower sections nor between the
outlet and extend/retract sections.
7. Be sure the surface of the raise/lower working
section and the seal plate are clean and free
of foreign material. Place the seal plate over
the tie rods and onto the working section.
Install all O-rings except the large elongated
one.
8. Using “white lithium” grease, brush a thin layer
over the elongated O-ring groove and insert
the large O-ring so that it adheres to all sides
of the O-ring groove. A blunt tool may be
required for this procedure.
9. Install the shuttle ball (11) on the raise/lower
working section.
10. Verify that all mating surfaces of the extend/
retract working section are clean and free of
foreign material. Slide working section (7)
over the tie rods taking care not to damage
thesurface of the working section. surface of
the working section.
11. Open a third seal plate kit (5) and verify the
parts included: seven (7) O-rings, one (1)
shuttle ball and one (1) seal plate.
NOTE: DO NOT use a shuttle ball between the
inlet and raise/lower sections nor between the
outlet and extend/retract sections.
12. Be sure the surface of the extend/retract
working section and the seal plate are clean
and free of foreign material. Place the seal
plate over the tie rods and onto the working
section. Install all O-rings except the large
elongated one.
13. Using “white lithium” grease, brush a thin layer
over the elongated O-ring groove and insert
the large O-ring so that it adheres to all sides
of the O-ring groove. A blunt tool may be
required for this procedure.
14. Verify that all mating surfaces of the outlet
section (4) are clean and free of foreign
material. Slide outlet section over the tie rods
taking care not to damage the surface of the
outlet section.
15. Install the four (4) large nuts (2) onto the tie
rods and hand tighten. Carefully lay the valve
onto the mounting pads and tighten the nuts to
15-17 lb-ft (20-23 Nm) torque using a cross
pattern in 2-1/2 lb-ft (6,10 Nm) increments.
16. Install all four (4) small nuts (1) onto the rods
and tighten to 15-17 lb-ft (20-23 Nm) torque
using a crossing pattern in 2 lb-ft (5 Nm)
increments.
17. Install manual handle or a 3/8 NC x 2" long
capscrew into the spool shift collars and shift
each spool. Check that each spool operates
freely to full “on” in both directions and returns
to neutral with spring force only.
18. Install fittings on the control valve as shown in
Fig. 9.43.