Komatsu 930E-2, Руководство по ремонту

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Driveshaft Group
15. Remove shaft seal (26, Figure 6-13).
16. Check shaft bearing (2) for galling, pitting, binding
or roughness. Replace if necessary.
17. Check shaft and its splines for wear. Replace any
parts necessary.
Compensator Block and Unloader Module
18. Remove screws (17, Figure 6-16) and separate
unloader module (18) from compensator block
(10).
19. Remove 4-way valve (11) and compensator (16)
from compensator block. Remove all plugs and
orifices (9 & 15). Clean block in solvent; inspect all
passages and orifices for obstructions.
20. Remove unloader valve from block (18). Remove
plugs and clean block passages. If unloader is
inoperative, replace entire module.
Stroke Adjuster Assembly
21. Measure and record dimension “A” on stroke
adjuster assembly as shown in Figure 6-17.
22. Loosen Jam nut (4). Separate stem (1) from gland
(3). Remove and discard O-ring (2).
23. Inspect parts for damage or excessive wear.
24. Install new O-ring on stem and reassemble to
gland. Adjust stem to gland to dimension “A”
recorded in step 21. Tighten Jam Nut.
ASSEMBLY
The procedures for assembling the pump are basically
the reverse order of disassembly procedures. During
assembly, install new gaskets, seals, and O-rings.
1. Apply a thin film of CLEAN grease or hydraulic fluid
to sealing components to ease assembly. If a new
rotating group is used, lubricate thoroughly with
CLEAN hydraulic fluid. Apply fluid generously to
all wear surfaces.
Swashblock Group
2. Press or tap roll pin (22, Figure 6-14) into pump
housing (18, Figure 6-13).
3. Press new shaft seal (26) into saddle (20, Figure
6-14) using an arbor press. Install O-ring (21) into
the groove in the saddle.
4. Press four roll pins (23) into saddle (20) until they
bottom, then press saddle bearing (24) onto the
pins to locate the bearing in the saddle.
Extreme care should be used not to damage sad-
dle bearing surfaces while installing the saddle
into the pump housing.
5. 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 surfaces). Sad-
dle is fully seated when a distinct metallic sound
is heard when installing saddle into pump hous-
ing.
6. Fasten control link (17, Figure 6-14) to swashblock
(25) using link pin (16) and two retaining rings
(14).
7. Be sure the two dowel pins (19), are pressed into
swashblock (25).
8. Insert swashblock into pump housing until it en-
gages in saddle bearing and allow swashblock to
settle to its lowest natural position.
9. Retain by installing two swashblock retaining pins
(19, Figure 6-13) and O-rings (20). Once pinned,
make certain swashblock strokes SMOOTHLY in
the saddle by pulling firmly on the free end of
control link.
FIGURE 6-17. STROKE ADJUSTER ASSEMBLY
1. Stem
2. O-Ring 3. Gland
4. Jam Nut
L6-20 Steering Circuit Component Repair L06021