Yanmar 4LHA-HTP User Manual

Chapter 3 Fuel Injection Equipment
5. Automatic Advancing Timer
4LHA Seri
5-3 Timer disassembly
Timer assy
Box nut
(1) Remove the camshaft box nut.
(2) Use a timer extractor to remove the timer assembly.
(3) The retainers and weights can be removed when
you take off the circlip and plate tightening bolts
and separate the timer gear and timer hub.
Note: As the advancing angle has been set at the
factory, do not disassemble the timer unless
necessary.
54 Timer inspection
(1) Inspect the timer spring, and replace if there is
excessive settling or corrosion.
(2) Inspect the retainer guide groove of the timer
weight, retainer, and gear it comes in contact
with, and replace if wear is excessive or move-
ment is not smooth.
(3) Inspect the circlip, and replace if there is excessive
wear.
Note: Recheck advancing angle when replacing weight
or spring, and readjust as necessary with adjust-
ing shims.
Timer weight
Circlip
Timer spring
-Retainer
,—. Retainer guide
"OVA groove
- Timer gear
Plate tightening
bolt
Plate
5-5 Timer reassembly
(1) Fix the plate by the tightening bolts.
N(kgf)m
Tightening torque
22.6 ~ 26.5 (2.3-2.7)
(2) Mount the timer assembly on the fuel injectio
pump camshaft, and tighten the box nut with
socket wrench.
N(kgf)m
Tightening torque
122.6 - 132.4(12.5-13.5)
3-2-39

Yanmar 4LHA-HTP Specifications

General

Brand	Yanmar
Model	4LHA-HTP
Category	Engine
Language	English