Service Manual

Camshaft Inspection
1. Check camshaft journal surfaces for damage or sei-
zure. If journal is seized, check cylinder head for pos-
sible damage. Also check for clogged oil holes in
cylinder head.
Journal
Figure 159
2. Check camshaft surface for irregular wear or dam-
age. Measure cam height (diameter of cam length). If
cam height is at the limit, replace the camshaft.
Cam Standard Value Limit
mm (in.) mm (in.)
Intake No.1 35.09 (1.3815) 34.59 (1.3618)
No. 2 35.07 (1.3807) 34.57 (1.3610)
No. 3 35.06 (1.3803) 34.56 (1.3606)
Exhaust No.1 35.15 (1.3839) 34.65 (1.3642)
No. 2 35.13 (1.3831) 34.63 (1.3634)
No. 3 35.19 (1.3854) 34.69 (1.3657)
Figure 160
Camshaft Installation
1. Insert camshaft from rear of cylinder head after apply-
ing a coat of engine oil to journals of camshaft. Install
camshaft thrust plate as shown. T
ighten bolt to specified
torque.
Camshaft thrust plate
Camshaft
U8EN061
Figure 161
2. Measure end play of camshaft. If it exceeds the limit,
replace camshaft thrust plate, camshaft, or both. Mea-
sure camshaft end play by inserting a feeler gauge be-
tween rear of camshaft thrust plate and No. 1 journal.
Standard value 0.06 – 0.14 mm (.0236 – .0551 in.)
Limit mm 0.3 mm (.118 in.)
Figure 162
Workman 3000/4000 Series
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Liquid Cooled Gas Engine
Liquid Cooled
Gas Engine