CHAPTER 2
8354/8404
I. Timing Gear
Item
Timing gear backlash
Idle gear side clearance
Clearance between
Idle gear shaft and idle
Idle gear shaft O.D
Idle gear bushing I.D
j. Piston Ring
Item
Piston pin-bore I.D
Clearance between
Oil ring and ring groove
Oil ring groove width
Oil ring width
Clearance between
2nd ring and ring groove
2nd ring groove width
2nd ring width
Top ring, oil ring end gap
2nd ring end gap
k. Connecting Rod
Item
Connecting rod misalignment
Clearance between
Piston and small end
bushing
Piston pin O.D
Small end bushing I.D
2-28
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
Factory Specification
0.0016 ~ 0.0043 in.
0.0079 ~ 0.0201 in.
0.025 ~ 0.066 mm
gear bushing
0.00098 ~ 0.00260 in.
37.959 ~ 37.975 mm
1.49445 ~ 1.49508 in.
38.000 ~ 38.025 mm
1.49606 ~ 1.49705 in.
Factory Specification
25.000 ~ 25.006 mm
0.98425 ~ 0.98448 in.
0.020 ~ 0.060 mm
0.00079 ~ 0.00236 in.
3.010 ~ 3.030 mm
0.11850 ~ 0.11929 in.
0.11693 ~ 0.11772 in.
0.00157 ~ 0.00315 in.
0.07992 ~ 0.08070 in.
0.07756 ~ 0.07834 in.
0.0098 ~ 0.01570 in.
0.0217 ~ 0.0276 in.
Factory Specification
0.014 ~ 0.038 mm
0.00055 ~ 0.00150 in.
25.002 ~ 25.011 mm
0.98433 ~ 0.98469 in.
25.025 ~ 25.040 mm
0.98524 ~ 0.98583 in.
0.04 ~ 0.11 mm
0.20 ~ 0.51 mm
2.97 ~ 2.99 mm
0.04 ~ 0.08 mm
2.03 ~ 2.05 mm
1.97 ~ 1.99 mm
0.25 ~ 0.40 mm
0.55 ~ 0.70 mm
-
Allowable Limit
0.15 mm
0.0059 in.
0.9 mm
0.035 in.
0.1 mm
0.0039 in.
-
-
Allowable Limit
25.03 mm
0.9854 in.
0.15 mm
0.0059 in.
-
-
0.15 mm
0.0059 in.
-
-
1.25 mm
0.0492 in.
1.25 mm
0.0492 in.
Allowable Limit
0.05 mm
0.0020 in.
0.15 mm
0.0059 in.
-
-
D615-W02 May-2003
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