Joining Alternator And Engine - Komatsu 930E-2 Shop Manual

Joining Alternator and Engine

When lifting alternator, attach hoist to lift eyes
only. The alternator weighs approximately 7,400
lbs. (3357 kg). Use a lifting device that can handle
the load safely.
1. Use the two top lift brackets provided on the
alternator for lifting. The top front lifting bracket
should be equipped with some method of adjust-
ing the alternator to keep it horizontal.
2. Carefully move alternator into place and engage
the engine drive ring (6, Figure 4-6) into the
alternator rotor drive (7) using shims "B", if re-
quired (refer to step 5.a. "Determining Shims").
3. Install flywheel housing adapter capscrews (2)
into alternator housing (1). Tighten to 175 ft. lbs.
(237 N.m) torque.
4. Install capscrews (5) through engine drive ring (6)
into the alternator rotor adapter (7). Rotate crank-
shaft to access and align holes. Tighten cap-
screws (5) to 175 ft. lbs. (237 N.m) torque.
5. Install alternator-to-cradle structure mounting
capscrews and washers (2, Figure 4-1) and
tighten to 525 ft. lbs. (712 N.m) torque.
6. Tighten engine-to-cradle structure mounting cap-
screws (5, Figure 4-1) to 345 ft. lbs. (465 N.m)
torque.
• Never pry on the engine crankshaft damper!
7. With magnetic base mounted on the front of the
engine and the dial indicator on the front of the
crankshaft, measure total crankshaft end-play:
Record Total Crankshaft End-play:
8. Compare the step 7 value to the measurement
taken before alternator was installed on engine.
C04023 03/01
FIGURE 4-6. ALTERNATOR TO ENGINE
1. Alternator Housing
2. Point Capscrew
3. Flywheel Housing
Adapter
4. Engine Flywheel Housing
The total Engine Crankshaft End-play (step 7)
must equal the original measurement or 0.020
in. (0.51 mm) (alternator end-play), whichever
is smaller.
If the end-play after the alternator and engine
are assembled is less than 0.020 in. (0.51 mm),
and less than the starting engine crankshaft
end-play, RESHIMMING IS REQUIRED.
9. Rotate the crankshaft one full revolution and listen
for any unusual noise caused by moving compo-
nents contacting stationary parts.
10. Install engine side cover, if removed. Install lock-
wire on all alternator mounting capscrews.
11. Install access cover on flywheel housing.
Power Train
MOUNTING
6. Engine Drive Ring
7. Alternator Rotor
"B" - Drive Shims
"D" - Housing Shims
C4-5