L3940 Block heater

mrtwister · Feb 27, 2011

I have to change the block heater on my 2010 L3940 again. The original leaked and shorted out after only 100 or so hours. My dealer sent me a new one under the tractor warranty and I changed it in November. Now that one is shorting but not leaking and I have a new one they sent me under the parts warranty. The problem is getting enough of the coolant drained to change the unit. The last time, I drained it thru the radiator drain but there was still coolant in the engine block above the plug. It was a real mess and I'd like to know if there is a better way to drain the coolant and keep my shop floor dry. Any ideas?

mrtwister · Feb 28, 2011

Service Dept Vic said:
That V2003 engine should have a factory block drain petcock located on the injection pump side of the block.

Drop the coolant from the rad drain, and then open the block drain to eliminate the coolant from the water jacket and that should make for a cleaner shop when doing this repair.

A more troublesome issue is the repeated failure of the block heater element. Tell us what you found when you replaced the first element and how it appears different when you change the element this time.

Have you checked it with a VOM? Installing it correctly? Using some silicone RTV around the edges of it? Did you replace the cord as well?

The one that's in now isn't leaking, it just blows the breaker when I plug it in. I tried a new cord and no difference. I installed it according to the instructions that came with it, using teflon tape on the threads. It worked fine for over 3 months.

brunswick000 · Feb 28, 2011

Sounds like its going straight to ground from some reason. Could be the unit I suppose. My electrical know how is rather limited. Have you checked your wall plug with other things? Try plugging something of equal drain into that outlet to see what happens. Also check under the face plate in the plug itself to make sure the wires attached to the plug tight, as well as at the breaker. Loose connections can cause breaks. Had a kitchen outlet that kept breaking and it turned out to be the wires on the side of the plug were touching the.side of the junction box. It must have gotten pushed in when the cabinets were put in. Just a couple of things to think of.

Sent from my Dell Streak using Tapatalk

mrtwister · Feb 28, 2011

brunswick000 said:
Sounds like its going straight to ground from some reason. Could be the unit I suppose. My electrical know how is rather limited. Have you checked your wall plug with other things? Try plugging something of equal drain into that outlet to see what happens. Also check under the face plate in the plug itself to make sure the wires attached to the plug tight, as well as at the breaker. Loose connections can cause breaks. Had a kitchen outlet that kept breaking and it turned out to be the wires on the side of the plug were touching the.side of the junction box. It must have gotten pushed in when the cabinets were put in. Just a couple of things to think of.

Sent from my Dell Streak using Tapatalk

I plugged a portable grinder into the extension cord, tried a different extension cord, etc. It's the block heater for sure.

eserv · Feb 28, 2011

Where is that block heater installed? If it is on the left side of the engine it WILL fail often! On the 4 cylinder L tractors the block heater must go on the right side behind the hydraulic pump. The design of the block prevents enough water circulation on the left side and causes the heaters to overheat.
Ed

mrtwister · Feb 28, 2011

eserv said:
Where is that block heater installed? If it is on the left side of the engine it WILL fail often! On the 4 cylinder L tractors the block heater must go on the right side behind the hydraulic pump. The design of the block prevents enough water circulation on the left side and causes the heaters to overheat.
Ed

It is on the left side. The tractor was delivered to me with it installed there at the factory, I presume, since I ordered the tractor with the block heater.

eserv · Feb 28, 2011

The block heaters are installed by the dealers. They screwed up. The instructions clearly show to install it behind the Hydraulic pump. It IS easier to install on the left, but they will not last!

eserv · Feb 28, 2011

The heaters DO go in the left side on the 3 cylinder L tractors though

eserv · Feb 28, 2011

Engine Block Heater Location

Localisation pour les chauffes moteur

MODEL / MODÈLE BLOCK HEATER PART # ENGINE / MOTEUR LOCATION ON UNIT
POSITION SUR LA MACHINE COMMENTS
COMMENTAIRES
TURF
GR2100 *70000-00117A D782 Tractor frame KCL local kit including 7000092500 block heater kit
GR2110 *70000-00117A D782 Tractor frame
G2160 *70000-00117 D782 Tractor frame
BX1850 *70000-00117A D722 Heater block attached to muffler bracket. KCL local kit including 7000092500 block heater kit. Easy access. No cord length issue
BX2350 70000-000771 D902 25 mm frost plug in the engine block No issue
BX24 70000-000771 D902 25 mm frost plug in the engine block No issue
BX25 70000-000771 D902 25 mm frost plug in the engine block No issue
BX2660 7000091510 D1005E3BX Exhaust side threaded plug No issue
GF1800 70000-17552 D722 Rear of cylinder head No issue
F2680E 70000-91510 D1105 Exhaust side threaded plug No issue
F2880 70000-91510 D1105 Exhaust side threaded plug No issue
F3080 70000-91510 D1305 Exhaust side threaded plug No issue
F3680 70000-91510 V1505 Exhaust side threaded plug No issue
ZD321 Not available D782 Tier 2 Not available ( no space at the back of cylinder head) to fit the 70000-73595 25 mm frost plug. Model not offer for 2007
ZD326 70000-91510 D1005 Exhaust side threaded plug No issue
ZD331 70000-91510 D1305 Exhaust side threaded plug No issue
B
B7510 70000-91510 D1005 Exhaust side threaded plug No issue
B7610 70000-91510 D1105 Exhaust side threaded plug No issue
B7800 70000-91510 V1505 Exhaust side threaded plug No issue
B2320 70000-91510 D1005 Exhaust side threaded plug No issue
B2620 70000-91510 D1105 Exhaust side threaded plug No issue
B2920 70000-91510 D1305 Exhaust side threaded plug No issue
B2630 70000-91510 D1105 Exhaust side threaded plug No issue
B3030 70000-91510 V1505 Exhaust side threaded plug No issue
L
L2800 70000-92500 D1403 Left Side, 1st/2nd Frost Plug from the fan No issue
L3400 70000-92500 D1703 Left Side, 1st/2nd Frost Plug from the fan No issue
L3700 70000-92500 D1803-M-E3 Knock-in type Left Side, 1st/2nd Frost Plug No issue
L4400 70000-92500 V2203 Knock-in type, need to R hydraulic pump No issue
L3240 70000-92500 D1703 Left Side, 1st/2nd Frost Plug, Can also use 70000-81500 in line block heater. No issue
L3540 70000-92500 D1803 Left Side, 1st/2nd Frost Plug, Can also use 70000-81500 in line block heater. No issue
L3940 70000-92500 V2003 Right Side, Behind Hyd. Pump, need to R hydraulic pump. Can also use 70000-81500 in line block heater, Lower Rad. Hose, left side No issue
L4240 70000-92500 V2203 Right Side, Behind Hyd. Pump, need to R hydraulic pump. Can also use 70000-81500 in line block heater, Lower Rad. Hose, left side No issue
L4740
L5040
L5240
L5740 70000-92500 V2403 Right Side, Behind Hyd. Pump, need to R hydraulic pump. Can also use 70000-81500 in line block heater, Lower Rad. Hose, left side No issue
M
MX5000 70000-92500 V2403 Knock-in type, need to R hydraulic pump,
Can also use 70000-81500 in line block heater. No issue
MX4700/MX5100
M5640SU 70000-92500 V2403 Knock-in type, need to R hydraulic pump,
Can also use 70000-81500 in line block heater. No issue

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L3940 Block heater

mrtwister

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mrtwister

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brunswick000

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eserv

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mrtwister

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eserv

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eserv

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eserv

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