Komatsu 830E-AC Shop Manual page 715

7. For handling purposes, insert a 1/4"-20UNC
cap screw into the threaded end of the control
link pin (16).
8. Using a brass rod and hammer, tap on end
opposite the cap screw to remove control link
pin (16).
Maximum volume stop gland (14, Figure 5-24)
MUST be removed BEFORE further disassembly
of control piston.
9. Without disturbing jam nut (16, Figure 5-24),
unscrew gland (14) and remove stroke adjuster
as a complete assembly.
Valve Plate Group
NOTE: Valve plate (17, Figure 5-26) is a slight press
fit in the pump housing (20, Figure 5-24).
10. Support valve plate (17, Figure 5-26) from an
overhead crane (lifting lug holes are provided)
and remove four cap screws (20) from valve
plate.
11. Remove valve plate (17) from pump housing
(20, Figure 5-24) by tapping away from the
housing with a mallet until valve plate pilot
diameter disengages from the case 6.35 mm
(0.25 in.).
12. With the weight of the valve plate still sus-
pended from the overhead crane, slide valve
plate back until it disengages from driveshaft
and set valve plate aside. Care must be taken
not to damage the wear face of valve plate (17).
13. To further disassemble control piston assembly,
move control piston (11, Figure 5-25) into
sleeve (4) until control piston maximum stop pin
(8) contacts the sleeve. Use a large mallet to
drive piston and sleeve assembly outward from
the valve plate.
L05035
14. When all sleeve seals (5, 6, & 7) are clear of the
valve plate, re-extend control piston (11). While
tipping the assembly enough to clear the hole,
pull the assembly from the valve plate.
15. Remove pin (18) from control piston by pressing
or tapping it out through the hole on opposite
side. Control stop pin (8) can be removed and
control piston (11) slipped out of sleeve (4).
16. Remove cap screws (9, Figure 5-26) and
remove compensator block (13).
17. Remove cap screws (21) and cover plate (19).
Rotating Group
Rotating group weighs approximately 30 lbs.
Extreme care must be taken not to damage cylin-
der wear face of cylinder wear plate face, bearing
diameters or piston shoes. Assistance from oth-
ers and use of proper lifting techniques is
strongly recommended to prevent personal
injury.
18. To remove rotating group, firmly grasp the cylin-
der barrel (10, Figure 5-25) and pull assembly
outward until cylinder spline disengages from
driveshaft spline about 63.5 mm (2.5 in.). Once
clear, rotate cylinder barrel a revolution or two
to break any contact between piston/shoe
assemblies (13) and swashblock (25) wear
face.
19. Slide rotating group off the driveshaft and out of
the pump housing and place it on a clean, pro-
tective surface with piston shoes facing upward.
20. Mark each piston, its cylinder bore and location
in shoe retainer for ease of inspection and
assembly.
Steering Component Repair L5-31