Komatsu 830E-AC Shop Manual page 517

5. For the four inner, 330 mm (13 in.) long cap
screws (6, Figure 2-3), tighten cap screws ini-
tially to 203 N-m (150 ft lbs) torque; then
advance cap screw head 90° using steps 6-a
through 6-c. Refer to Figure 2-6.
6. To tighten a cap screw 60° or 90°:
a. Mark a reference line on a corner of the hex-
agonal cap screw head or nut. Then mark
the position located 60° or 90° clockwise rel-
ative to the first reference line on the mount-
ing surface. Refer to Figures 2-5 or 2-6.
b. To ensure that the opposite end of the turn-
ing member (either the cap screw head or
nut remains stationary), scribe a reference
mark for this check across the side of the
cap screw (or nut) and the mounting surface.
c. Each corner of a hexagon represents 60°.
The turning members (either the cap screw
head or nut), is now tightened until the
marked corner is adjacent with the marked
reference line. Check to make sure that the
opposite end of the turning member has
NOT turned during the tightening procedure
as marked in Step 6-b.
NOTE: Do not exceed 4 RPM tightening speed.
Do not hammer or jerk wrench during the tighten-
ing procedure.
FIGURE 2-5. REFERENCE MARKS FOR 60°
ADVANCE (165 mm/6.5 in. Cap Screws)
H02026
7. Loosen the top two corner cap screws (1) and
the bottom outer four cap screws (8, the 4 bot-
tom cap screws with nuts).
8. Tighten the top, two corner 165 mm (6.5 in.)
cap screws to 95 N-m (70 ft lbs) torque, then
use the turn-of-the-nut method (Steps 6-a
through 6-c) to advance cap screw heads 60°.
Refer to Figure 2-5.
9. Tighten the bottom, outer four 330 mm (13 in.)
cap screws to 203 N-m (150 ft lbs) torque, then
use the turn-of-the-nut method (Steps 6-a
through 6-c) to advance cap screw heads 90°.
Refer to Figure 2-6.
NOTE: If for any reason, these fasteners need to be
checked for tightness after completing the above
procedure; loosen and inspect all 14 cap screws and
repeat entire process, starting with cleaning and
lubricating cap screws, washers, and nuts.
10. To finish the suspension installation, return to
Step 7 in the Installation procedure.
FIGURE 2-6. REFERENCE MARKS FOR 90°
ADVANCE (330 mm/13 in. Cap Screws)
Front Suspensions H2-7