Komatsu 830E-AC Shop Manual page 723

32. Pull free end of control link (17, Figure 5-25)
toward back of pump housing until the open
hole in the link lines up with open ports on sides
of pump case.
33. Install maximum volume stop gland (14, Figure
5-24) and adjusting screw (12) to hold swash-
block in place.
Valve Plate Group
34. Be sure driveshaft bearing (15, Figure 5-26) is
in place. Using assembly grease (to hold
desired position), place valve plate gasket (16)
in position on valve plate (17).
35. Support valve plate assembly from an overhead
crane (lifting lug holes are provided) in prepara-
tion for mating to the pump housing.
36. Assemble one control link retainer ring (14, Fig-
ure 5-25) and one control link washer (15) onto
the threaded hole side of the control link pin
(16). Then thread a 1/4 in - 20 UNC cap screw
into pin to ease holding.
37. Carefully maneuver valve plate assembly, sup-
ported by overhead crane, over driveshaft and
into pump housing so slot on control piston (11)
engages control link (17).
38. With hole in control piston lined up with hole in
the link, carefully insert control link pin (16).
Care should be taken during this next step to prevent
the washer and retaining ring from falling into pump
housing.
39. Install second control link washer (15) and con-
trol link retaining ring (14) onto pin.
L05035
40. Once assembled, remove cap screw from pin.
NOTE: Valve plate is a slight press fit into pump
housing. Make sure pilot diameter on valve plate (17,
Figure 5-26) is aligned with mating diameter on the
pump housing prior to assembly.
41. Insert four cap screws (20, Figure 5-26) and
alternately tighten until valve plate is drawn up
to the pump housing. Tighten cap screws
evenly to 330 N·m (244 ft lbs) torque.
42. Install O-ring (22) with backup ring (23) in seal
groove of control cover cap (24).
43. Insert bias control piston springs (1, Figure 5-
25) into control piston (11). Use four cap screws
(3, Figure 5-26) to fasten control cover cap to
back of valve plate (17). Tighten cap screws (3)
evenly to 187 N·m (138 ft lbs) torque.
44. Install cover plate (19) with new O-ring (18) and
cap screws (21).
45. Install O-rings (26, 27 and 28) in proper location
on top of valve plate. Install compensator (13)
to valve plate with cap screws (9) and tighten
securely.
46. Install 4-way valve (8), and relief valve (14).
47. Install 1.575 mm (0.062 in.) diameter orifice (30)
and plug (7) with new O-ring (6) in side of com-
pensator block as shown in Figure 5-26. Install
0.813 mm (0.032 in.) diameter orifice (10), plug
(7) and O-ring (6) in top of block.
48. Install remaining plugs with new O-rings.
49. Install unloader module (29) on compensator
block with new O-rings (25) and socket head
cap screws (31). Tighten cap screws to 9.8 N·m
(87 in. lbs) torque.
50. Install plugs (9 & 23, Figure 5-24) and O-rings
(10 & 15) in pump housing.
51. Measure pump rotation torque. Rotation torque
should be approximately 20.4 N·m (15 ft lbs).
Steering Component Repair L5-39