Komatsu 830E Shop Manual page 473

4. Use a long brass bar and a mallet (or an arbor
press), to install saddle and bearing assembly
into pump housing. Tap or press ONLY on the
area of the saddle that is exposed between the
saddle bearings (DO NOT tap on bearing sur-
faces). Saddle is fully seated when a distinct
metallic sound is heard when installing saddle
into pump housing.
5. Fasten control link (17, Figure 5-24) to swash-
block (25) using link pin (16) and two retaining
rings (14).
6. Be sure the two dowel pins (19), are pressed
into swashblock (25).
7. Insert swashblock (25) into pump housing (20,
Figure 5-23) until it engages in saddle bearing
and allow swashblock to settle to its lowest nat-
ural position.
8. Retain by installing two swashblock retaining
pins (19) and O-rings (18) in place. Once
pinned, make certain swashblock strokes
SMOOTHLY in the saddle by pulling firmly on
the free end of control link (17, Figure 5-24).
Driveshaft Group
NOTE: Be sure punch marks on cylinder bearing (26,
Figure 5-24) will face toward shaft end of pump.
9. Insert cylinder bearing (26) straight into pump
housing. Be sure bearing is positioned so bear-
ing retainer pins (17, Figure 5-23) can be
inserted in the case and into the bearing.
10. Install O-rings (18) on pins (17) and install pins.
11. An arbor press is required to install shaft bearing
(2) onto driveshaft (1). IMPORTANT - press
ONLY on the inner race of the bearing. Press
bearing until it contacts the shoulder on drive-
shaft.
12. Use a long 6 in. (153 mm) sleeve with an I.D.
slightly larger than the retaining ring I.D. and
press retaining ring (4) towards bearing until it
seats in the groove.
13. Place seal retainer (21) over seal (24) inside the
pump housing (20). Lubricate shaft seal with
clean hydraulic oil.
14. Install entire driveshaft assembly through the
front of the pump housing. A mallet will be
required to install the driveshaft through shaft
seal (2).
15. Once the driveshaft assembly is fully seated
within the pump housing, install snap ring (3).
L05026
Rotating Group
16. Mating surfaces should be greased. Place cylin-
der assembly on clean table with the valve plate
side down.
17. During disassembly, shoe retainer springs were
referenced to individual bores. Assemble rotat-
ing group by inserting shoe retainer springs (28,
Figure 5-24) into the same spring bores located
in cylinder barrel (10) that they came from.
18. Slide fulcrum ball (12) over the nose of the cylin-
der barrel (10).
19. Place shoe retainer (27) over fulcrum ball and
align holes in retainer with corresponding holes
(marked during disassembly) in the cylinder
barrel. Once aligned, insert piston/shoe assem-
blies (13) into corresponding (marked during
disassembly) holes completing the rotating
group.
The assembled rotating group weighs approxi-
mately (30 lbs.). Assistance from others and
proper use of proper lifting techniques is
strongly recommended to prevent personal
injury.
20. The rotating group can now be carefully installed
over the end of the driveshaft and into the pump
housing (20, Figure 5-23).
21. When installing the rotating group, support the
weight of the cylinder barrel (10, Figure 5-24) as
cylinder spline is passed over the end of drive-
shaft to avoid scratching or damage.
22. Push cylinder barrel forward until the cylinder
spline reaches the driveshaft spline. Rotate the
cylinder slightly to engage shaft splines.
23. Continue to slide cylinder barrel forward until it
encounters the cylinder bearing (26, Figure 5-
24). Lifting the driveshaft slightly helps cylinder
barrel (10) and cylinder bearing engagement.
Continue pushing cylinder forward until the pis-
ton shoes contact swashblock (25).
24. At this point, the back of the cylinder barrel
should be located approximately 0.25 in (6.3
mm) inside the back of the pump housing.
Steering Component Repair L5-29