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G38 Engine

Safety, Operation, Maintenance

& Parts Manual

LT40HD

rev. K5.00 - K7.01

LT40HD Super

rev. J9.01 - K4.00

LT50HD

rev. A1.01 - A6.00

Safety is our #1 concern!

 Read and understand

all safety information and instructions before oper-
ating, setting up or maintaining this machine.

May 2017

Form #2242

Summary of Contents for LT40HD

Page 1: ...ts Manual LT40HD rev K5 00 K7 01 LT40HD Super rev J9 01 K4 00 LT50HD rev A1 01 A6 00 Safety is our 1 concern Read and understand all safety information and instructions before oper ating setting up or maintaining this machine May 2017 Form 2242 ...

Page 2: ...RZQ WR WKH 6WDWH RI DOLIRUQLD WR FDXVH FDQFHU DQG ELUWK GHIHFWV RU RWKHU UHSURGXFWLYH KDUP OZD V VWDUW DQG RSHUDWH WKH HQJLQH LQ D ZHOO YHQWLODWHG DUHD I LQ DQ HQFORVHG DUHD YHQW WKH H KDXVW WR WKH RXWVLGH R QRW PRGLI RU WDPSHU ZLWK WKH H KDXVW V VWHP R QRW LGOH WKH HQJLQH H FHSW DV QHFHVVDU RU PRUH LQIRUPDWLRQ JR WR ZZZ 3 ZDUQLQJV FD JRY 51 1 ULOOLQJ VDZLQJ VDQGLQJ RU PDFKLQLQJ ZRRG SURGXFWV FDQ ...

Page 3: ...v K6 09 LT40HD Super Rev K3 17 LT50 Rev A5 17 4 2 Fuel Tank G28 G29 G38 4 3 LT40 Rev K4 06 K4 07 LT40 Super Rev J7 16 LT40HD Rev K6 07 K6 08 LT40HD Super Rev K3 15 K3 16 LT50 Rev A5 15 A5 16 4 3 Fuel Tank G26 G29 G38 2010 4 4 LT40 Prior to Rev K4 06 LT40 Super Prior to Rev J7 16 LT40HD Prior to Rev K6 07 LT40HD Super Prior to Rev K3 15 LT50 Prior to Rev A5 15 4 4 Fuel Tank G26 G29 G38 Pre 2010 4 5...

Page 4: ...Table of Contents Section Page iv WMdoc091819 Table of Contents INDEX I ...

Page 5: ...sawmill operator s manual and manufacturer s manual before attempting to operate this equipment IMPORTANT Read the sawmill operator s manual and engine manu facturer s manual for instructions and safety precautions before oper ating 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 G38 ...

Page 6: ...the battery Engine Temperature Indicator Not used 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 Not used Engine Start DANGER Always be sure the blade is disengaged and all persons are out of the path...

Page 7: ...perate engine without proper and operational spark arrester muffler Sparks emitted from the engine exhaust could ignite surrounding materials causing serious injury or death WARNING EPA Compliant Gas Tanks Only Always relieve all fuel pressure inside the tank prior to filling or connecting fuel fittings Fail ure to do so may result in fuel spillage WARNING EPA Compliant Gas Tanks Only Disconnect t...

Page 8: ...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 Con tact with hot engine components ca...

Page 9: ...icates a new cartridge is necessary CAUTION Do not clean elements with water or compressed air Do not handle the inner element unless it is to be changed Handle new elements carefully Contact with the element could cause damage and prevent the filter from operating properly Replace the inner air cleaner cartridge every 1200 hours of operation or more often if operating the sawmill in dirty conditi...

Page 10: ...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 3 1 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 has more than 3 16 at 9 lb of deflection tighten the belt as described below 4 Loosen ...

Page 11: ...n the cable when engine is idling to slide down into the cable spring This maintains free operation of the cable and prevents the cable from kinking Make sure the shoulder bolt does not rub against the crankcase vent tube 1 Start the engine to measure the low end RPM 2 Refer to the engine manual to adjust the low end RPM 3 Engage the clutch handle to throttle the engine and measure the high end RP...

Page 12: ...Maintenance Miscellaneous Maintenance 3 3 5 WM doc 9 18 19 Maintenance Review the manufacturer s engine manual for maintenance intervals ...

Page 13: ...LT40HD Super Rev K3 17 LT50 Rev A5 17 REF DESCRIPTION Indicates Parts Available In Assemblies Only PART QTY TRAY ASSEMBLY GAS CAN 074821 1 1 Tank 5 Gallon Low Pro EPA Fuel 103878 1 1 2 Grommet Shut Off 061250 1 3 Gas Cap LT15 061251 1 4 Valve Slosh 061252 1 5 Grommet Slosh Valve 061253 1 6 Fitting Fuel Pick Up With Shut Off 074943 1 1 3 2 5 4 6 13 7 9 3H1166C 15 17 18 16 15 9 14 8 12 11 11 ...

Page 14: ... Washer 1 4 SAE Flat F05011 11 2 15 Bolt 1 4 20 x 3 4 Hex Head Grade 5 F05005 123 3 16 Bolt 5 16 18 x 1 2 Hex Head Grade 5 F05006 15 4 17 Washer 5 16 Split Lock F05011 13 4 18 Washer 5 16 SAE Flat F05011 17 4 Hose Fuel 3 16 EPA 15G CARB R02423 1 8 Ft Hose Fuel 1 4 EPA 15G CARB R02423 2 8 Ft 1 Fuel shut off valve added to fuel tank to prevent possibility of fuel feeding back into engine during trav...

Page 15: ...8 LT40HD Super Rev K3 15 K3 16 LT50 Rev A5 15 A5 16 REF DESCRIPTION Indicates Parts Available In Assemblies Only PART QTY TANK ASSEMBLY 6 GALLON GAS SERVICE 074643 1 1 Tank Gas 076478 1 2 Fitting 1 4 NPT Male Quick Disconnect 015583 1 3 FITTING FEMALE QUICK DISCONNECT BARB 015582 1 4 HOSE FUEL 1 4 EPA 15G CARB R02423 2 6 67 Ft 5 CLAMP 7 32 1 2 HOSE P649 4 1 2 3 4 5 3H1163 ...

Page 16: ...N GAS SERVICE 074643 1 1 Customers with sawmills and edgers manufactured in 2010 and later need to use new EPA approved 3 or 6 gallon gas can assem blies see technical bulletin TB150005 for more information 5 gallon gas can assemblies are available only for customers with sawmills and edgers manufactured prior to 2010 See Section 4 4 1 1 Tank Gas 076478 1 2 Fitting 1 4 NPT Male Quick Disconnect 01...

Page 17: ... customers with sawmills and edgers manufactured prior to 2010 see technical bulletin TB150005 for more information Customers with sawmills and edgers manufactured in 2010 and later need to use new EPA approved 3 or 6 gallon gas can assemblies See Section 4 3 1 1 Tank 5 Gallon Red Fuel P12167 1 2 Pickup 9 Fuel P12172 1 3 Cap 3 or 5 Gallon Fuel Tank P09683 1 4 Fitting 1 4 NPT Plastic Female Disconn...

Page 18: ...9 1 1 Mount Weldment Kohler Engine 014514 1 BUSHING ASSEMBLY MOTOR MOUNT 016380 3 2 Bushing 2 OD x 2 016378 1 3 Bearing 1 x 1 1 4 x 2 016379 1 4 CLAMP WELDMENT MOTOR MOUNT PIVOT BUSHING 014540 3 5 BOLT 3 8 16 X 1 HEX HEAD F05007 7 3 6 NUT 3 8 16 HEX NYLON LOCK F05010 10 6 7 BOLT 1 2 13 X 1 1 4 HEX HEAD GRADE 5 F05008 37 1 8 PIN WELDMENT ENGINE MOUNT PIVOT 014154 1 9 NUT 1 2 13 NYLON LOCK F05010 8 ...

Page 19: ...ter Kohler Secondary Air 25 083 04 S 046554 1 3 Filter Kohler Oil 52 050 02 S 014717 1 Plug Kohler G35 G38 Spark 62 132 04 S 061003 2 Pump Fuel 62 559 01S 061156 1 4 Washer 3 8 SAE Flat F05011 3 4 5 Bolt 3 8 16 x 2 Hex Head Grade 5 F05007 124 4 6 Nut 3 8 16 Hex Nylon Lock F05010 10 4 7 Fitting 1 2 MPT x 3 8 FPT Reducer Bushing 003227 1 8 Hose 7 Oil Drain P10082 1 9 Cap Oil Drain 3 8 Pipe P04332 1 ...

Page 20: ...ts See Section 4 4 1 17 Engine Mount Parts See Section 4 2 1 Muffler 110658 1 18 Spark Arrestor 1 1 2 Dia 110660 1 19 Pipe 1 1 2 Exhaust Connector 110659 1 20 Clamp 1 1 2 Muffler P09900 1 Starter Assembly 25 098 21S 061371 1 21 FILTER KOHLER FUEL 24 050 13 P12758 1 22 BELT 3 5VL750 DRIVE 006672 1 23 BRACKET WDMT CLUTCH ENHANCEMENT 015058 1 24 BOLT 3 8 16X1 HH F05007 7 2 25 WASHER 8 FLAT SAE F05011...

Page 21: ...4 1 3 Spacer Alternator Pulley 036571 1 4 BRACKET WELDMENT ALTERNATOR MOUNTING 003202 1 5 PLATE WELDMENT ALTERNATOR MOUNT 015875 1 6 STUD ALTERNATOR BELT TENSION ADJUSTMENT 023764 1 7 WASHER 3 8 SAE FLAT F05011 3 7 8 NUT 3 8 16 NYLON LOCK F05010 10 3 9 WASHER 3 8 SPLIT LOCK F05011 4 4 10 BOLT 3 8 16 X 1 HEX HEAD GRADE 5 F05007 87 2 11 BOLT 3 8 16 X 3 HEX HEAD FULL THREAD F05007 1 3 12 NUT M8 1 25 ...

Page 22: ...LAT F05011 17 1 17 BOLT 5 16 18 X 3 4 HEX HEAD F05006 5 1 18 PLATE ALTERNATOR BELT ACCESS 023794 1 19 BOLT 10 24 X 1 2 PAN HEAD F05015 17 2 20 BOLT 3 8 16 X 3 4 HEX HEAD F05007 27 1 21 BELT 6PK425 FIBERGLASS 023709 1 22 WIRE ASSEMBLY GROUND JUMPER 017770 1 23 WASHER 3 8 EXTERNAL STAR LOCK F05011 36 1 24 BOLT M10 1 5 X 25MM HEX HEAD GRADE 8 F81003 11 1 ...

Page 23: ...RIPTION Indicates Parts Available In Assemblies Only PART QTY 1 GUARD WELDMENT G35 G38 ENGINE PULLEY 003220 1 2 PLATE WELDMENT G35 G38 ENGINE PULLEY GUARD MOUNT 003263 1 3 BOLT 1 4 20 X 3 4 HEX HEAD WITH CONICAL WASHER F05005 134 9 4 GROMMET 5 8 ID RUBBER P11764 1 5 GUARD KOHLER SIDE ENGINE PULLEY 015962 1 1 2 4 3H0980D 3 5 ...

Page 24: ...ery 3 2 cooling system 3 2 fuel filter 3 2 miscellaneous 3 4 RPM adjustments 3 4 safety 3 1 O operation 2 1 control lights 2 1 shutoff 2 2 starting 2 1 P parts list engine assembly 4 7 engine mount assembly 4 6 fuel tank 4 1 4 3 4 4 4 5 motor assembly 4 7 pulley guards 4 11 INDEX ...

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