Yanmar 4LHA-HTP - Page 353

Chapter 2 Basic Engine
8. Camshaft and Tappets
.4LHA Serie:
(3) Measure the camshaft outer diameter and the camshaft
bearing inner diameter. Replace if they exceed the wear
limit or are damaged.
mm (in.)
Standard
Wear limit
Gear case side
Intermediate
Flywheel side
Wear limit
Camshaft journal outside dia.
56.91 - 56.94
(2.2406-2.2417)
56.91 - 56.94
(2.2406-2.2417)
56.91 - 56.94
(2.2406-2.2417)
56.80
(2.2362)
Camshaft journal bushing inside dia.
56.98 - 57.05
(2.2433-2.2461)
-
-
57.10
(2.2480)
Cylinder block bearing inside dia.
57.00 - 57.03
(2.2441 - 2.2453)
57.00 - 57.03
(2.2441 - 2.2453)
57.10
(2.2480)
Oil clearance
0 04 - 0 14
(0.0016-0.0055)
0.06-0.12
(0.0024 - 0.0047)
0.06-0.12
(0.0024 - 0.0047)
(4) Check the camshaft for circle runout
Support both ends of the camshaft with V-blocks,
place a dial gauge against the central bearing areas and
measure the circle runout. Replace if excessive.
mm(in.)
Standard
limit
Camshaft circle
runout (TIR)
0.02 or less
(0.0008)
0.05
(0.0020)
4LHA-HTE/-HTZE
-HTP/-HTZP
4LHA-STE/STZE
-STP/STZP
-DTE/DTZE
-DTP/DTZP
Camshaft
P/N
119171-14010
. 119195-14010
2-33