woodmizer LT30 Guide

D42 Engine
Safety, Operation, Maintenance
& Parts Manual
LT30 Super rev. G9.00 - J3.04
LT40 Super rev. H1.00 - J4.04
LT30HD Super rev. H4.00 - J8.05
LT40HD Super rev. H4.00 - J8.05
Safety is our #1 concern! Read and understand
all safety information and instructions before oper-
ating, setting up or maintaining this machine.
January 2004
Form #917

ii D4297doc062215 Table of Contents
Table of Contents Section-Page
ABOUT THIS MANUAL III
SECTION 1 OPERATION 1-1
1.1 Starting The Engine................................................................................1-1
SECTION 2 MAINTENANCE 2-1
2.1 Safety......................................................................................................2-1
2.2 Cooling System ......................................................................................2-2
2.3 Fuel Filter ...............................................................................................2-3
2.4 Battery ....................................................................................................2-4
2.5 Alternator Belt ........................................................................................2-5
2.6 RPM Adjustments ..................................................................................2-7
SECTION 3 REPLACEMENT PARTS 3-1
3.1 Fuel Tank................................................................................................3-1
3.2 Engine Mount Assembly ........................................................................3-2
3.3 Engine Assembly....................................................................................3-3
3.4 Primary Fuel Filter .................................................................................3-5
3.5 Throttle Assembly ..................................................................................3-6
3.6 Muffler Assembly...................................................................................3-8
3.7 Drive Assembly ......................................................................................3-9
3.8 Drive Assembly ....................................................................................3-10
LT30 Super Rev. F7.00 - H3.00
LT40 Super Rev. F8.00 - H4.00
LT30HD Super Rev. G1.00 - H7.00
LT40HD Super Rev. G1.00 - H7.00
3.9 Radiator Assembly ...............................................................................3-11
LT30 Super Rev. H7.00+
LT40 Super Rev. H8.00+
LT30HD Super Rev. J2.00+
LT40HD Super Rev. J2.00+
3.10 Radiator Assembly ...............................................................................3-13
LT30 Super Rev. G9.00 - H6.00
LT40 Super Rev. H1.00 - H7.00
LT30HD Super Rev. H4.00 - J1.00
LT40HD Super Rev. H4.00 - J1.00
3.11 Alternator Assembly.............................................................................3-15
3.12 Engine Pulley Guards ...........................................................................3-17
INDEX I
TOC

About This Manual D4297doc062215 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.
ENGINE COMPONENTS
Muffler
Radiator
Serial Number/Engine Type
Alternator
Oil Filter Starter
Motor

Operation
Starting The Engine
1
1-1 D4297doc062215 Operation
SECTION 1 OPERATION
1.1 Starting The Engine
Engine Control Lights
See Figure 1-1. The following indicator lights are located on the sawmill control panel.
Alternator Charge Indicator: Lights up if the alternator is not charging the battery.
Engine Temperature Indicator: Lights up if the engine is overheating. A circuit breaker
assembly in the engine harness will shut the engine off if the engine overheats. Turn the
key switch off and allow the engine to cool for a period of time before restarting. If the
overheating condition persists, stop operating the engine until the condition is corrected.
The engine will automatically switch to low idle if an overheating condition occurs.
Key Switch Indicator: Lights up when the key is in either the on or accessory (#1 or #3)
position.
Oil Indicator: Lights up if the oil pressure is too low. The engine will automatically switch to
low idle if a low oil condition occurs.
Glow Plug Indicator: Lights up after the key has been turned to the on (#1) position.
FIG. 1-1

Operation
Starting The Engine
Operation D4297doc062215 1-2
1
See Table 1-1. IMPORTANT! The glow plug sensing relay was replaced on LT30 Super
Rev. H9.07, LT40 Super Rev. J1.07, LT30HD Super Rev. J5.07 and LT40HD Super
Rev. J5.08 to provide manual control of glow plug operation. Previous revisions can be
modified to improve durability (see form #1151). See the table for recommended glow
plug on times.
NOTE: The glow plug light will stay on indefinitely when the key is in the pre-start (1) posi-
tion. The glow plug light will go out after the engine is started.
CAUTION! Avoid leaving the key in the pre-start (1) posi-
tion for more than 30 seconds while the engine is not run-
ning. Doing so will drain the sawmill battery which may
reduce its service life.
Engine Start
DANGER! Always be sure the blade is disengaged and all
persons are out of the path of the blade before starting the
engine. Failure to do so will result in serious injury.
DANGER! Operate your engine/machine only in well venti-
lated areas. The exhaust gases of your engine can cause
nausea, delirium and potentially death unless adequate
ventilation is present.
DANGER! Never operate an engine with a fuel or oil leak.
The leaking fuel or oil could potentially come in contact with
hot surfaces and ignite into flames.
WARNING! Be sure the power feed switch is in the neutral
position before turning the key switch to the on (#1) or
accessory (#3) position. This prevents accidental carriage
movement. which may cause serious injury or death.
WARNING! Do not operate engine without proper and
operational spark arrester/muffler. Sparks emitted from the
On Times For Manually Operated Glow Plugs
Ambient Temperature Suggested Glow Plug On Time
Less Than 32° F (0° C) 30 Seconds
32 - 60° F (0 -15° C) 25 Seconds
60 - 80° F (15 - 27° C) 15 Seconds
Above 80° F (27° C) 10 Seconds
TABLE 1-1

Operation
Starting The Engine
1
1-3 D4297doc062215 Operation
engine exhaust could ignite surrounding materials, causing
serious injury or death.
CAUTION! Do not crank starter for more than 7 seconds at
one time during starting attempts. Damage to the engine
may result.
CAUTION! Let engine idle for 2 minutes before applying
load to prevent engine damage.
1. See the engine manufacturer’s manual for lubricating oil recommendations for specific
temperature ranges.
2. Use #2 or better quality diesel fuel for above freezing starting. Use a #1 quality diesel fuel
for below freezing starting.
3. Turn the key switch on the control panel to the on (#1) position.
4. Wait the recommended glow plug on time (See TABLE 1-1)
5. Turn the key switch to the start (#2) position and release.
Engine Shutoff
CAUTION! A minimum 2 minute idle time is recommended
to allow the battery charge to recover before the engine is
shut off.
Turn the key switch to the off (#0) position.

Maintenance
Safety
Maintenance D4297doc062215 2-1
2
SECTION 2 MAINTENANCE
Refer to the manufacturer’s manual for maintenance intervals and procedures unless oth-
erwise instructed in this manual. Follow the manufacturer’s recommendations for dusty
conditions.
IMPORTANT! This manual only provides information about
additional procedures or procedures to be performed at dif-
ferent time intervals than found in the manufacturer's manu-
als. Refer to the manufacturer's manual for complete
maintenance instructions.
2.1 Safety
Use caution when performing maintenance or service to the engine.
DANGER! Always be aware of and take proper protective
measures against rotating shafts, pulleys, fans, etc. Always
stay a safe distance from rotating members and make sure
that loose clothing or long hair does not engage rotating
members resulting in possible injury.
DANGER! Engine components can become very hot during
operation. Avoid contact with any part of a hot engine. The
exhaust components of your engine are especially hot
during and following operation. Contact with hot engine
components can cause serious burns. Therefore, never
touch or perform service functions on a hot engine. Allow
the engine to cool sufficiently before beginning any service
function.
WARNING! Remove the blade before performing any
engine service. Failure to do so may result in serious injury.
WARNING! Always wear proper and necessary safety
equipment when performing service functions. Proper
safety equipment includes eye protection, breathing protec-
tion, hand protection and foot protection.
This symbol identifies the interval (hours of operation) at which each maintenance pro-
cedure should be performed. "AR" signifies maintenance procedures which should be
performed as required.
0

Maintenance
Cooling System
2
2-2 D4297doc062215 Maintenance
2.2 Cooling System
Clean the radiator fins every 8 hours of operation. Spray the radiator with water from a
hose or compressed air to clean sawdust from the radiator fins. Do not use a pressure
sprayer.
CAUTION! Failure to keep the radiator fins clear of sawdust
and/or dirt may cause the engine to overheat resulting in
damage to the engine.
8

Maintenance
Fuel Filter
Maintenance D4297doc062215 2-3
2
2.3 Fuel Filter
See Figure 2-1. Replace the primary fuel filter cartridge every 1500 hours or one year of
operation. After replacing the filter cartridge, loosen the air bleed screw and operate the
fuel pump bail until fuel begins to flow from the valve and is free of air bubbles. Tighten
the bleed screw. Inspect the water separator bowl periodically and drain the bowl as
required by turning the drain cap counterclockwise as viewed from the bottom.
FIG. 2-1
1500
Filter Cartridge
Water Drain
Bleed Screw
3H0463

Maintenance
Battery
2
2-4 D4297doc062215 Maintenance
2.4 Battery
Check the battery electrolyte level every 50 hours of operation. See manufacturer’s man-
ual for instructions.
DANGER! Batteries expel explosive gases. Keep sparks,
flames, burning cigarettes, or other ignition sources away at
all times. Always wear safety goggles and a face shield
when working near batteries. Failure to do so will cause
serious injury.1
WARNING! Battery posts, terminals and related accesso-
ries contain lead and lead compounds, chemicals known to
the State of California to cause cancer and reproductive
harm. Wash hands after handling.
1. Battery Council International, copyright 1987
50

Maintenance
Alternator Belt
Maintenance D4297doc062215 2-5
2
2.5 Alternator Belt
The belt tension should be checked after the first 100 hours of operation, when the bat-
tery is not charging properly or when the alternator belt is squealing. If the battery contin-
ues to not charge properly or the belt continues to squeal after the initial belt adjustment,
replace the belt.
1. Release the blade tension and remove the blade from the sawmill if necessary. Turn the
key switch to OFF (0) and remove the key.
2. Remove the drive belt cover and alternator cover.
See Figure 2-2.
3. Use a belt tension gauge to measure the belt tension. Place the gauge on the belt at the
midpoint between the two pulleys. If the belt tension is less than 3/16” with 9 lb. of deflec-
tion, tighten the belt as described below.
4. Loosen the upper pivot, lower pivot and the adjustment bolt jam nut.
5. Turn the belt tension adjustment bolt clockwise to tighten the belt, counterclockwise to
loosen the belt. Adjust the bolt until the proper belt tension is achieved.
CAUTION! Do not overtighten the alternator belt. Damage
to the alternator will occur.
FIG. 2-2
AR
Belt Adjustment
Bolt
Jam Nut Upper Pivot
Lower
Pivot
3H0748-11

Maintenance
Alternator Belt
2
2-6 D4297doc062215 Maintenance
6. After the alternator belt has been tensioned, tighten the adjustment bolt jam nut. Tighten
the upper and lower pivots and replace the belt covers.

Maintenance
RPM Adjustments
Maintenance D4297doc062215 2-7
2
2.6 RPM Adjustments
WARNING! Remove the blade before performing any
engine service. Failure to do so may result in serious injury.
Check the RPM with a tachometer after the first 20 hours of operation and every 200
hours thereafter.
See Table 2-1.
Before checking the RPM, make sure belt and brake strap tensions are correct (See Saw-
mill Maintenance). Also check oil, fuel, and coolant levels.
Make sure the throttle cable does not affect the engine RPM when the clutch handle is
disengaged. Make sure the cable is not bent or kinked.
1. Use the bottom threaded cable mount to adjust the throttle cable. When the clutch handle
is disengaged, the throttle cable should be taut but the spring not extended. When the
clutch handle is engaged, the throttle spring should extend 1/8" to 1/4". Once the throttle
cable is adjusted properly, use the adjustments provided on the engine to adjust the
engine RPM (3200[+0, -100] high-end, 1500[±100] idle).
CAUTION! Do not extend the throttle spring over 1/4".
Excessive tension may cause the throttle cable to fail pre-
maturely.
Engine High End RPM Low End RPM
D42 3200 1500
TABLE 2-1
200

Maintenance
RPM Adjustments
2
2-8 D4297doc062215 Maintenance
See Figure 2-3.
2. Start the engine to measure the low-end RPM. Let idle for 10 minutes.
3. With the engine at idle, check the low-end RPM. Adjust to 1500. To decrease speed,
loosen the idle adjustment screw. To increase speed, tighten the idle adjustment screw.
See Figure 2-4.
FIG. 2-3
FIG. 2-4
Adjust top nut, then
bottom nut up to loosen
throttle cable
Adjust bottom nut, then
top nut down to tighten
throttle cable
3H0748-1
High-End
Adjustment Screw
Idle
Adjustment Screw
3H0748-2

Maintenance
RPM Adjustments
Maintenance D4297doc062215 2-9
2
4. Adjust the high-end RPM to 3200. To decrease speed, tighten the high-end adjustment
screw. To increase speed, loosen the high-end adjustment screw.
CAUTION! Do not adjust the high-end RPM above 3200.
Doing so may cause damage to the engine.

Maintenance
RPM Adjustments
2
2-10 D4297doc062215 Maintenance
5. After the RPM settings are made, shut the engine off. Tighten the throttle cable by engag-
ing the clutch handle. Check the throttle cable at the upper cable mounting bracket. The
cable should be centered in the cable housing. If necessary, loosen the upper bracket
mounting bolts and adjust the bracket so the cable housing is centered around the cable.
Retighten the upper cable bracket mounting bolts.
See Figure 2-5.
CAUTION! Failure to properly center the throttle cable in
the cable housing may result in premature cable wear.
FIG. 2-5
Mounting Bolts
Upper Throttle
Cable Mount
Bracket
Throttle Cable
Housing
Throttle Cable
3H0748-12

Replacement Parts
Fuel Tank
Replacement Parts D4297doc062215 3-1
3
SECTION 3 REPLACEMENT PARTS
3.1 Fuel Tank
REF DESCRIPTION (Indicates Parts Available In Assemblies Only) PART # QTY.
TANK ASSEMBLY, 5 GALLON GREEN DIESEL A12132 1
1Tank, 5 Gallon Green Fuel P12166 1 
2Pickup, 9" Fuel P12172 2
3Cap, 3/5 Gallon Fuel Tank P09683 1
4Fitting, 1/4” NPT Male Quick Disconnect 015583 1
5Fitting, Female Quick Disconnect Barb 015582 1
6Fitting, 1/4" NPT Plastic Female Disconnect P12175 1
7Fitting, 1/4” Barb Plastic Male Disconnect P12176 1
8 HOSE, 1/4” ID FUEL P642 7.17 Ft
9 HOSE, 5/16” ID FUEL 016338 9 Ft.
10 CLAMP, 7/32 - 1/2 HOSE P649 6
ADDITIVE, DIESEL FUEL 16OZ BOTTLE 004878 1
1 Stanadyne Performance Formula helps eliminate contaminants and water in fuel, prevents gelling in cold weather, and improves
lubrication of fuel system parts. 16 oz. bottle treats 60 gallons of diesel fuel.
1
1
2
2
4
3
10
5
10
9
8
3H0780
6
7

Replacement Parts
Engine Mount Assembly
3
3-2 D4297doc062215 Replacement Parts
3.2 Engine Mount Assembly
REF DESCRIPTION (Indicates Parts Available In Assemblies Only) PART # QTY.
1 MOUNT WELDMENT, FRONT KUBOTA ENGINE 015812 1
2 MOUNT WELDMENT, REAR KUBOTA ENGINE 015815 1
3 BOLT, 1/2-13 X 1 1/4” HEX HEAD GRADE 5 F05008-37 1
4 PIN WELDMENT, KUBOTA ENGINE MOUNT PIVOT 015855 1
5 NUT, 1/2-13 HEX NYLON LOCK F05010-8 1
BUSHING ASSEMBLY, MOTOR MOUNT 016380 1
1 New assembly 016380 replaces original rubber pivot bushing P12164 and bronze bushing P05041 supplied prior to LT30 Super
Rev. G9.00, LT40 Super Rev. H1.00 and LT30HD/40HD Super Rev. H4.00. NOTE: When replacing original components with new
assembly, it is best to replace all three assemblies at the same time.
3
6Bushing, 2” OD x 2” 016378 1 
7Bearing, 1” x 1 1/4” x 2” 016379 1 
8 BOLT, 3/8-16 X 1” HEX HEAD F05007-7 3
9 CLAMP WELDMENT, MOTOR MOUNT 014540 3
10 NUT, 3/8-16 HEX NYLON LOCK F05010-10 6
11 BOLT, M10X1.25X25MM HEX HEAD F05009-52 8
12 WASHER, 10MM SPLIT LOCK F05011-88 8
13 NUT, M8 HEX NYLON LOCK F05010-132 1
1
3
5
4
7
6
6
8
8
9
7
7
6
8
2
9
10
10
10
3H0748-3B
11
12
12
11
13

Replacement Parts
Engine Assembly
Replacement Parts D4297doc062215 3-3
3
3.3 Engine Assembly
REF DESCRIPTION (Indicates Parts Available In Assemblies Only) PART # QTY.
ENGINE, KUBOTA 1505TE 015921 1
Belt, Kubota Fan #16282-97010 028514 1
Filter, Kubota Air #17351-11083 028568 1
Strap, Kubota Air Filter Holder #16296-1125-0 028589 1
Cushion, Kubota Air Filter Holder #16296-1187-0 028590 1
1Filter, Kubota Fuel #70000-43081 028560 1
2Filter, Kubota Oil #16271-32090 018050 1
Gasket Kit, Kubota Lower #07916-29265 028519 1
Gasket Kit, Kubota Upper #16285-99352 028572 1
Gasket, Kubota Exhaust #15263-12370 028513 1
Gasket, Kubota Fuel Injector #15841-53622 028516 1
Gasket, Kubota Fuel Transfer Pump #16264-52140 028518 1
Gasket, Kubota Head #16292-03310 028571 1
Gasket, Kubota Muffler #15263-12371 028549 1
Gasket, Kubota Oil Drain Plug #15451-96670 028543 1
Gasket, Kubota Stop Solenoid #16299-60150 028544 1
Gasket, Kubota Thermostat #15313-7320 028545 1
Gasket, Kubota Valve Cover #16241-14520 028524 1
Gasket, Kubota Water Pump #16259-73430 028526 1
Glow Plug, Kubota #16851-65510 028562 1
Injector, Kubota Fuel #16032-53000 028515 1
3Motor, Kubota Starter #37560-63010 028522 1
4Plug, Kubota Oil Drain #16541-33750 028542 1
3
2
1
4
6
5
7
3H0748-15

Replacement Parts
Engine Assembly
3
3-4 D4297doc062215 Replacement Parts
5Pump, Kubota Fuel Injector #16060-51010 028540 1
6Pump, Kubota Fuel Transfer #16285-52032 028517 1
Pump, Kubota Water #16241-73032 028525 1
7Radiator Parts (See Section 3.9)
Sending Unit, Kubota Heat Senser #TM9A230RQCG 028510 1
Solenoid Kit, Kubota Fuel Stop #17208-60012 046951 1 1
Switch, Kubota Oil Pressure #15841-39010 028547 1
Thermostat, Kubota #19434-73010 028546 1
Seal, Kubota Front Oil #16241-0421-2 038424 1
HARNESS ASSEMBLY, KUBOTA DIESEL ENGINE 050846 2 1
HARNESS ASSEMBLY, KUBOTA DIESEL ENGINE 024594 2 1
Breaker Assembly, Water Temp Max Circuit 024453 1
Relay, Glow Plug 023359 3 1
Socket Kit, Glow Plug Relay 053048 4 1
Fuse, 50A Kubota Glow Plug 024597 1
1 Fuel Stop Solenoid Kit 046951 replaces 028523 supplied before 7/04. Three-wire Solenoid #17454-60010 no longer available. Kit
includes Solenoid #17208-60012 and two-wire adaptor plug.
2 Use 050846 harness for LT30 Super Rev. H9.03+, LT40 Super Rev. J1.03+ and LT30HD/40HD Super Rev. J5.03+ with new Kubota
fuel solenoid. Use 024594 for previous revisions with old fuel solenoid.
3 Lombardini Glow Plug Relay 023359 replaces Bosch Relay 024598 to improve durability (LT30 Super Rev. H9.07, LT40 Super Rev.
J1.07, LT30HD Super Rev. J5.07 and LT40HD Super Rev. J5.08. New relay requires manual operation of the glow plugs (See Form
#1151).
4 Replaces 024554 originally supplied. Kit includes pre-assembled socket with applicable wires, terminals and fuse.