Service and Repairs

14
Specifi cations
KohlerEngines.com 17 690 01 Rev. L
TORQUE SPECIFICATIONS
4,6
CH245/CH255 CH260/CH270 CH395 CH440
Muffl er
Exhaust Screw
M8
M10
24 N·m (212 in. lb.)
---
---
35 N·m (310 in. lb.)
Muffl er Shield Screw
M6 8 N·m (71 in. lb.)
M4 2 N·m (18 in. lb.) 3.5 N·m (31 in. lb.)
Spark Arrestor Screw M5 3.5 N·m (31 in. lb.)
Retractable Starter
Cover Screw 5.4 N·m (48 in. lb.)
Center Screw 10 N·m (89 in. lb.)
Rocker Arm
Stud 13.6 N·m (120 in. lb.)
Pivot Jam Nut 10 N·m (89 in. lb.)
Valve Cover
Fastener
8 N·m (71 in. lb.) 10 N·m (89 in. lb.)
CLEARANCE SPECIFICATIONS
4
CH245/CH255 CH260/CH270 CH395 CH440
Camshaft
Running Clearance 0.016/0.052 mm
(0.0006/0.0020 in.)
0.007/0.043 mm
(0.0003/0.0017 in.)
0.016/0.052 mm
(0.0006/0.0020 in.)
Bore I.D.
New 14.000/14.018 mm
(0.5512/0.5519 in.)
16.000/16.018 mm (0.6299/0.6306 in.)
Max. Wear Limit 14.018 mm
(0.5519 in.)
16.068 mm (0.6326 in.)
Camshaft Bearing Surface O.D.
New --- 13.975 mm
(0.5502 in.)
15.975 mm (0.6289 in.)
Max. Wear Limit --- 13.90 mm
(0.547 in.)
15.90 mm (0.626 in.)
Cam Lobe Profi le (minimum
dimension, measured from base
circle to top of lobe)
Intake - New
27.608 mm
(1.087 in.)
27.787 mm
(1.094 in.)
32.408 mm
(1.276 in.)
32.286 mm
(1.271 in.)
Max. Wear Limit 27.354 mm
(1.067 in.)
27.533 mm
(1.084 in.)
32.154 mm
(1.266 in.)
32.032 mm
(1.261 in.)
Exhaust - New 27.770 mm
(1.093 in.)
27.861 mm
(1.097 in.)
32.12 mm
(1.265 in.)
32.506 mm
(1.280 in.)
Max. Wear Limit 27.516 mm
(1.083 in.)
27.607 mm
(1.087 in.)
31.866 mm
(1.255 in.)
32.252 mm
(1.270 in.)
4
Values are in Metric units. Values in parentheses are English equivalents.
6
Lubricate threads with engine oil prior to assembly.