Hyster D010, Техника безопасности, техническое обслуживание и ремонт

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Crankshaft and Main Bearings Repair 600 SRM 496
Crankshaft and Main Bearings Repair
REMOVE
1. Remove bracket for cooling fan.
2. Remove six capscrews and plate from crankshaft
pulley. Remove six capscrews that hold crank-
shaft pulley to timing pulley.
3. Remove capscrew from timing pulley. Install spe-
cial tool on crankshaft to remove timing pulley.
Rotate tool until it touches front of crankshaft.
Hit tool with hammer to loosen timing pulley. Re-
move pulley, dowel pin, and tapered ring. Re-
move tool.
4. Remove oil pan and oil strainer.
5. Remove rear cover. Remove front cover with oil
pump.
6. Remove caps for connecting rods. Put identifica-
tion mark on each cap so they will be installed in
correct location.
7. Before removing crankshaft, measure clearance
between crankshaft and flange of center main
bearing. See Figure 26. Push crankshaft fully
forward before making measurement.
Maximum clearance is 0.30 mm (0.012 in.). If
clearance is greater than specification, replace
center main bearing or crankshaft.
1. CENTER MAIN BEARING
Figure 26. Crankshaft Clearance Measurement
8. Put identification marks on bearing caps. Loosen
capscrews for main bearing caps in steps. Then
remove capscrews, caps, and crankshaft.
INSPECT AND REPAIR
Crankshaft
1. Inspect crankshaft for wear, cracks, or other
damage. Replace crankshaft if it has cracks.
2. Use micrometer to measure diameter of journals
for crankshaft. See Figure 27. Make measure-
ment at several locations for each journal. Cor-
rect dimensions for journals are as follows:
Main Journal Diameter - 59.937 to 59.995 mm
(2.3597 to 2.3620 in.)
Connecting
Rod Journals - 50.940 to
50.955 mm (2.0055 to 2.0061 in.)
Rear Oil Seal Surface - 89.946 to 90.000 mm
(3.5412 to 3.5433 in.)
Front Oil Seal Surface - 33.961 to 34.000 mm
(1.3371 to 1.3386 in.)
If measurements are less than specifications,
grind crankshaft and install undersize bearings.
3. Check crankshaft for straightness. See Fig-
ure 27. Put front and rear journals in V blocks
and rotate crankshaft one complete turn. Maxi-
mum amount that dial indicator should indicate
is 0.03 mm (0.0012 in.).
4. Check oil passages crankshaft. Make sure pas-
sages are clean and have no restrictions.
Main Bearings
NOTE: Do not clean main bearings. If any bearings
are too dirty, replace all main bearings.
1. Inspect main bearings for damage. If any main
bearing is damaged, all main bearings must be
replaced.
2. To inspect main bearings for wear, measure
clearance between main bearings and crank-
shaft. See Figure 28.
a. Install crankshaft in cylinder block.
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