Yanmar D10 Guide

D10 Engine
Safety, Operation, Maintenance
& Parts Manual
LT15 rev. C3.01
Safety is our #1 concern! Read and understand
all safety information and instructions before oper-
ating, setting up or maintaining this machine.
February 1998
Form #1098
!

ii D10doc041409 Table of Contents
Table of Contents Section-Page
ABOUT THIS MANUAL III
SECTION 1 OPERATION 1-1
1.1 Preparation For Starting .........................................................................1-2
1.2 Starting The Engine................................................................................1-5
1.3 Stopping The Engine ............................................................................1-11
SECTION 2 MAINTENANCE 2-1
2.1 Air Cooling System ................................................................................2-1
2.2 Air Filter & Pre-Cleaner.........................................................................2-2
2.3 Oil & Oil Filter .......................................................................................2-3
2.4 Fuel Filter ...............................................................................................2-4
2.5 Drive Belt Adjustment............................................................................2-5
2.6 Alternator Belt ........................................................................................2-7
2.7 RPM Adjustments ..................................................................................2-9
SECTION 3 REPLACEMENT PARTS 3-1
3.1 How To Use The Parts List ....................................................................3-1
3.2 Sample Assembly ...................................................................................3-1
3.3 Engine Assembly....................................................................................3-2
3.4 Brake/Belt Tensioner Assembly.............................................................3-4
3.5 Key Switch Mount Bracket ....................................................................3-7
SECTION 4 ELECTRICAL INFORMATION 4-1
4.1 Electrical Wiring Diagram, LT15D10+SW08 .......................................4-1
4.2 Electrical Components, LT15D10..........................................................4-2

About This Manual D1001doc032609 iii
ABOUT THIS MANUAL
This manual is provided as a supplement to the equipment manufacturer’s manuals. This
manual provides information specific to the use of this equipment on the Wood-Mizer®
sawmill. Refer to the sawmill operator’s manual and manufacturer's manual before
attempting to operate this equipment.
IMPORTANT! Read the sawmill operator’s manual and
engine manufacturer’s manual for instructions and safety
precautions before operating this equipment.
The information and instructions given in this manual do not amend or extend the limited
warranties for the equipment given at the time of purchase.
!

OPERATION
1
1-1 D10doc041409 OPERATION
SECTION 1 OPERATION
While your engine is still new, applying heavy loads may reduce its life. Follow the
breaking-in procedure below during the first 20 hours of operation.
1. Avoid overloading
Never apply heavy loads during the breaking-in period.
2. Change engine oil regularly
Change the engine oil after the first 50 hours of operation or after the first month
(whichever comes first) and every 3 months or 200 hours thereafter.
DANGER! Always drain the oil while the engine is still
warm. It may be difficult to drain the oil completely when the
engine is cold.
3. Check the fuel level in the fuel indicator pipe. Do not allow the fuel tank to become
empty. If this should happen, perform the following steps:
a) Fill the tank with diesel fuel,
b) Unbolt the fuel tank mounting bolts,
c) Raise the fuel tank so that fuel flows into the solenoid valve and air bleeds from the
system,
d) Tighten the tank mounting bolts and attempt to start the engine,
e) If the starting attempts are not successful, repeat steps b-d.

OPERATION
Preparation For Starting
OPERATION D10doc041409 1-2
1
1.1 Preparation For Starting
1. Fuel Selection And Handling
Use only diesel fuel recommended by the manufacturer. Before filling the fuel tank, make
sure the fuel does not contain water and/or dust. Failure to do so may result in damage to
the fuel injection pump and nozzles.
CAUTION! Use only recommended diesel fuel. Failure to
do so may result in serious engine damage.
CAUTION! The cetane value of the diesel fuel should be
above 45. This will ensure easy engine start and will
prevent misfiring and white exhaust gases.
CAUTION! Diesel fuel substitutes are not recommended;
they may cause damage to the fuel system.
CAUTION! The fuel should be free of water and dust.
Damage to the fuel injection pump and nozzles may result.
Change engine oil
Start up
1st time Approx.
one month
or 50 hours
Thereafter
every 3 months
or 200 hours

OPERATION
Preparation For Starting
1
1-3 D10doc041409 OPERATION
Overfilling is very dangerous. Do not fill the tank beyond the top of the red plug inside the
fuel tank filter.
Fuel tank capacity: 4,7 l.
2. Engine Oil
WARNING! Always check the engine oil level before starting the engine. Add oil if
necessary. If the lubricating oil level is too low, it may result in engine damage. If it is too
high, a sudden increase of RPM can occur as a result of the lube oil combustion.
Use 5W/40 engine oil.
Pour the oil up to the mouth of the filler port. Make sure the engine is level when pouring
the oil.
Lube oil capacity: 1.65 l.
Red Plug
C
ap
Upper level
Lower leve
l

OPERATION
Preparation For Starting
OPERATION D10doc041409 1-4
1
3. Servicing The Air Cleaner
1 - Air cleaner, 2 - Wing nut
1 - Element
CAUTION! Do not clean the air cleaner element with
detergents as it is of an oil-soaked type.
CAUTION! Replace the element when the power output
decreases or a bad color of the exhaust gases is noticed.
CAUTION! Never run the engine without the air cleaner
element. Doing so may result in quick engine wear.

OPERATION
Starting The Engine
1
1-5 D10doc041409 OPERATION
1.2 Starting The Engine
Recoil Starting
1 - Fuel cock
Perform the following steps to start the engine:
1. Set the fuel cock in the open (“O”) position.
2. Put the engine speed lever in the “START” position.
Grip

OPERATION
Starting The Engine
OPERATION D10doc041409 1-6
1
3. Pull out the start rope.
a) Holding the rope handle, pull the rope until you feel strong resistance and then allow
the handle to return to its initial position.
b) Push the decompression lever down. It will return automatically to its original
positionwhen the start rope is pulled again.
c) Pull out the start rope briskly holding the handle with both hands.
CAUTION! Do not allow the start rope handle to rapidly
return to its original position. Release it gently to avoid
damage to the starter.
CAUTION! Always pull the start rope firmly to start the
engine.
WARNING! Never use any cold-starting aids such as ether,
gasoline, paint thinner or other volatile liquid or gas.

OPERATION
Starting The Engine
1
1-7 D10doc041409 OPERATION