Suzuki SQ416 Service Manual page 51
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- Service manual (118 pages) ,
- Owner's manual (266 pages) ,
- Service manual (731 pages)
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6A2-6 ENGINE MECHANICAL (H25 ENGINE)
4, (b)
1. Lower crankcase
2. Bolt (10 mm thread diameter)
3. Bolt (8 mm thread diameter)
4. Long bolt (8 mm thread diameter)
1. Thrust bearing
2. Oil groove
INSPECTION
Crankshaft runout
Using a dial gauge, measure runout at center journal. Rotate crank-
shaft slowly. If runout exceeds its limit, replace crankshaft.
Limit on runout: 0.06 mm (0.0023 in.)
Crankshaft thrust play
2, (a)
Measure this play with crankshaft set in cylinder block in the normal
manner, that is, with thrust bearing and journal bearing caps
installed. Tighten crankcase bolts to specified torque in such order
as indicated in figure.
NOTE:
Tighten 10 mm thread diameter bolts first (following the order
shown in figure), then tighten 8 mm thread diameter bolts.
3, (b)
Tightening Torque
(a): 60 N
(b): 27 N
Use a dial gauge to read displacement in axial (thrust) direction of
crankshaft.
If its limit is exceeded, replace thrust bearing with new standard one
or oversize one to obtain standard thrust play.
Crankshaft Thrust Play
Standard: 0.11 – 0.31 mm (0.0044 – 0.0122 in.)
Limit:
Item
Thickness of
crankshaft
thrust bearing
Out-of-round and taper (uneven wear) of journals
An unevenly worn crankshaft journal shows up as a difference in
diameter at a cross section or along its length (or both). This differ-
ence, if any, is determined by taking micrometer readings. If any
one of journals is badly damaged or if amount of uneven wear in the
sense explained above exceeds its limit, regrind or replace crank-
shaft.
Limit on out-of-round and taper: 0.01 mm (0.0004 in.)
Out-of-round: A – B
Taper:
.
m (6.0 kg-m, 43.5 lb-ft)
.
m (2.7 kg-m, 19.5 lb-ft)
0.38 mm (0.0149 in.)
Thrust Bearing
Standard
2.500 mm
(0.984 in.)
a – b
Oversize
0.125 mm (0.0049 in.)
2.563 mm
(0.1009 in.)
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