3. If
the measurement is less than the allowable limit,
replace it.
BX1880 and BX2380
Setting load / Set-
ting length
Factory specifi-
cation
65 N / 27.0 mm
6.6 kgf / 27.0 mm
15 lbf / 1.06 in.
Allowable limit
55 N / 27.0 mm
5.6 kgf / 27.0 mm
12 lbf / 1.06 in.
BX2680
Setting load / Set-
ting length
Factory specifi-
cation
117.4 N / 31.0 mm
1
1.97 kgf / 31.0 mm
26.39 lbf / 1.22 in.
Allowable limit
100.0 N / 31.0 mm
10.20 kgf / 31.0 mm
22.48 lbf / 1.22 in.
6.1.13 Checking oil clearance between
rocker arm and rocker arm shaft
1. Measure the rocker
arm shaft O.D. with an outside
micrometer.
BX1880 and BX2380
Rocker arm shaft
O.D.
Factory specifi-
cation
10.473 to 10.484 mm
0.41233 to 0.41275 in.
BX2680
Rocker arm shaft
O.D.
Factory specifi-
cation
11.973 to 11.984 mm
0.47138 to 0.47181 in.
2. Measure the rocker
arm I.D. with an inside
micrometer, and then calculate the oil clearance.
BX1880 and BX2380
Rocker arm I.D.
Factory specifi-
cation
10.500 to 10.518 mm
0.41339 to 0.41409 in.
BX2680
Rocker arm I.D.
Factory specifi-
cation
12.000 to 12.018 mm
0.47244 to 0.47314 in.
3. If the oil clearance exceeds the allowable limit,
replace the
rocker arm and measure the oil
clearance again. If it still exceeds the allowable
limit, replace also the rocker arm shaft.
BX1880 and BX2380
Oil clearance be-
tween rocker arm
and rocker arm
shaft
Factory specifi-
cation
0.016 to 0.045 mm
0.00063 to 0.0017 in.
Allowable limit
0.15 mm
0.0059 in.
BX2680
Oil clearance be-
tween rocker arm
and rocker arm
shaft
Factory specifi-
cation
0.016 to 0.045 mm
0.00063 to 0.0017 in.
Allowable limit
0.10 mm
0.0039 in.
6.1.14 Checking push rod alignment
1. Place the push rod on V blocks.
2. Measure the push rod alignment.
3. If
the measurement exceeds the allowable limit,
replace the push rod.
Push rod align-
ment
Allowable limit
0.25 mm
0.0098 in.
 SERVICING
6. Servicing 3. ENGINE
BX1880,BX2380,BX2680,RCK60B-23BX,RCK54-23BX,RCK48-18BX,RCK60D-26BX,RCK54D-26BX
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