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Any concerns with feederhouse drives holding up? Combine is chipped so power not an issue. 612 has chopping knives.
 

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we ran one it had over 1800 acres on it and didn't have any problems but it was a little short on power so that chip should help
 

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HI Bleedsgreen, we have the same thing 9670 with stalkmaster 612, ours have the hvy duty drives, we have ours chipped also, What chip are u using? who makes it,

we are currently running a agricultural performance enginering chip, i think thats what its called, the only one out there that weve found that will work, tried both the bully dog and ts performance with no luck.
 

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Should make it a fixed drive. But if cann't do this.

The Standard Variable has no oil cooler, a single belt at the electric clutch, and the back of the feeder house belt is smooth, and it is mostly on smaller and older combines. This was the only drive on 10 Series and earlier.

The Heavy Duty Variable has an oil cooler, a double belt at the electric clutch, and the back of the feederhouse belt has small cogs. This drive started production with 50 Series. The return oil hose is the indication of the High Capacity Drive.

The High Torque Variable drive also has an oil cooler, a double belt at the electric clutch, but the top of the variable drive belt has large cogs like on the bottom. The gearbox is much larger, and the sheave is locked on with a large nut. This drive started production during 60 Series in 2006. (715100 - ).

Proper lubrication of the cams is one of the most important things you can do to ensure the feederhouse drive is working properly. The Operator's Manual recommendation is: When operating in severe conditions or high yielding corn, grease each fitting 3 - 5 pumps every 10 hours.

IMPORTANT: After greasing, cycle the variable from low to high speed a few times to distribute the grease inside the gearcase.

Note: Run the feederhouse variable to high speed, (sheaves apart). In this position the cam cavity will be the smallest, Caution: Greasing with sheaves together (low speed-larger cam cavity) could cause the seal to be blown out. With sheave turned so zerks are in the 12 o'clock and 2 o'clock positions see 5877.jpg, the zerk at 12 o'clock provides grease to the cam cavity, and the zerk at 2 o'clock provides grease to the inner cam surface and grease seal. The zerk at 12 o'clock can take additional grease (5-8 pumps every ten hours). Grease will purge out under the tension spring. Use TY6341 or TY25744 Greases Only. Other types of grease will dry out and become hard making them ineffective. Grease at least once a day (more if yield is above 200 bu/ac) with TY6341 or TY25744. Cycle the variable each time after greasing.

Note: Discourage customers from using less expensive or other types of grease. TY6341 and TY25744 greases are the only approved greases for the variable drive system. If any other type of grease (other than TY6341 and TY25744) have been used: Disassemble the cams, clean out all evidence of whatever type of grease that is currently there and start over using TY6341 or TY25744. see graphic 5877_1.jpg Inspect the cams for rust, burrs and for galling. This is usually caused by the lack of lubrication. Replace as required.

Inspect outer , upper variable sheave, see graphic 5877_3.jpg If it is black from heat the upper sheaves must be realigned making sure they are parallel with the Feeder House side sheet.

Check to ensure that the backshaft speed range is 520 to 780 rpm with no load at high idle. If there is more than a 20-rpm difference in either the high or low speed, readjustment is required. Run the variable to slow speed 520 rpm, stop the machine and measure the sheave gap. It MUST be 1/8" (3mm). If the gap is more than 1/16" off, readjustment is required. Sheave gap must be maintained at 1/8" ± 1/16” (3mm).

IMPORTANT: Move the upper variable to the rear as much as possible to obtain the sheave gap. This method will allow the idler pulley to be as low as possible thereby providing maximum belt wrap while still maintaining the 3MM sheave gap. See OM for the details.

Check to ensure that the backshaft speed range is 520 to 780 rpm with no load at high idle. If there is more than a 20-rpm difference in either the high or low speed, readjustment is required. Run the variable to slow speed 520 rpm, stop the machine and measure the sheave gap. It MUST be 1/8" (3mm). If the gap is more than 1/16" off, readjustment is required. Sheave gap must be maintained at 1/8" ± 1/16” (3mm). see graphic 5877_4.jpg

IMPORTANT: Move the upper variable to the rear as much as possible to obtain the sheave gap. This method will allow the idler pulley to be as low as possible thereby providing maximum belt wrap while still maintaining the 3MM sheave gap. See OM for the details. see graphic 5877_5.jpg

Sheave Gap Adjustment

1.) Move the idler (A) down to the bottom of the slot. DO NOT stand on belt then push idler up to set gap.

2.) Next move the upper variable to the rear as much as possible using adjusting bolt (B) to obtain the 3 mm (1/8”) sheave gap. This method will allow the idler pulley to be as low as possible thereby providing maximum belt wrap. 5877_10.jpg

3.) Check upper drive sheave, it must run parallel with side sheets of the feederhouse. Look at upper, outer sheave for burnt or black marks. This is a sign of the sheave running crooked.

4.) Adjust idler to remove slack from belt.

5.) Run the variable through its speed range at high engine idle, from low to high and make sure the backshaft speed is 520 to 780. If there is more than ± 20 rpm difference in either high or low speed, readjustment is necessary.


At this time also inspect the idler bracket for bending and or cracking. A new, stronger idler bracket is available. Replace with AH205618. see graphic 5877_6.jpg

During harvest, run the backshaft at a faster speed. Running faster backshaft speed reduces the torque loads, which results in lower heat levels, which can cause less belt slippage. This also increases the torque sensing efficiency for the belt drive resulting in less belt slippage and more heat transfer. This may require slowing the corn head down to under drive or the 1:1 drive ratio in order to maintain desired ground speed.

Check the movement of the cams in the reverser. see graphic 5877_7.jpgRun the variable drive to the high end (780 rpm) and let it run there for 10 to 15 seconds. Stop the combine and make two timing marks exactly across form one another on the reverser sheaves. Now run the variable again and lower the speed all the way to the slow speed (520 rpm) and let it run at this speed for a few seconds. stop the combine and check the position of the timing marks. They should have moved approximately 3/8" (9mm) or more apart, depending on the type of drive. if they did, the cams are working properly. If they did not move apart, the cams are likely locked up. Check cam-mating angles for burrs, nicks or something that is preventing them from moving. Refer to Technical Manual (Diagnostics and Test) to make sure there is proper oil flow from pump to cooler and back to the pump. This should be at least 1.7 gpm at 640 rpm backshaft speed.

Additional Information :
Oil: Testing has shown that there is some benefit from using synthetic oil. These oils will run a few degrees cooler, but the difference is insignificant. The major advantage is that they will not break down as fast as conventional oil in heavy load conditions. Synthetic oil will run longer and hotter without turning black from oxidation. A second major benefit of using synthetic oil is it will have less change in viscosity in cold weather, enabling the oil cooler pump to circulate oil more efficiently. If you choose to install synthetic oil in the feederhouse reverser, John Deere currently offers synthetic oil, TY26408. Starting with 70 Series combines, all feederhouse reverser gearboxes are factory filled with synthetic gear oil in place of 80W90. This oil can be used in reverser gearboxes on 60 Series and prior models.

The reverser gearcase oil capacity is: listed in the Operator’s Manual. Because of heat generated from the variable sheaves, the amount of airflow over the cooler, ambient temperature, various sizes of headers and crop conditions, the effectiveness of the cooler can vary greatly.

In some cases the addition of a second cooler has resulted in satisfactory operation.

Mixing of greater then one cup of synthetic oil, TY26408, and 80W90 is not recommended. If the 80W90 oil has been drained for service, you can refill with TY26408 without having to flush the gearcase. Also make sure to drain the cooler and lines before refilling with synthetic.

Grease: John Deere offers TY25744 John Deere Extreme Duty Synthetic Grease.

This grease is Non-toxic, food grade, and biodegradable. It is translucent white in color. It has an operating temperature range of -45 deg. F to +450 deg. F. The grease thickener is fumed silica which is a synthetic thickener. The lubricating media of the grease is a combination of synthetic oil and PTFE (Teflon) particles held in suspension. The Extreme Pressure test performance of TY25744 is 80% of that for TY6341, however the load wear index (which defines the overall EP performance) for TY25744 is 180% that of TY6341. Our conclusion from this is that the EP performance of TY25744 is as good as or better than that for TY6341.

Compatibility testing has shown that TY25744 can be used as relube for a unit already filled with TY6341 without concern of any serious consequences.

Based on the above information our conclusion is that for this application TY25744 is as good as or better than TY6341 in the torque sensing feeder house drive application. We would recommend it to customers running with high feeder house drive load levels as providing a potential improvement in performance of the variable belt drive. We recommend following the 10hr lube interval with 2 to 3 pumps for each zerk on the torque sensing unit.

Upgrade by Combine Model

9000 Series Combines:

A feeder house reverser oil cooler BH81311 can be installed.

The 42 degree cams can be installed for more belt drive capacity. Cam kit, AH213114.

10 Series Combines:

A feeder house reverser oil cooler BH81389 can be installed.

The 42 degree cams can be installed for more belt drive capacity. Cam kit, AH213114.

50 Series Combines:

Internal oil pump in Heavy Duty gearcase and cooler are now standard equipment on Heavy-Duty Variable drives. Serial number (685101 - 704999).

Combines with standard variable drives serial number 700100 - can add an oil pump & cooler with bundle BH84479, and new hoses.

The 42 degree cams as well as a larger upper variable hydraulic cylinder and bearing can be installed for more belt drive capacity. Cam kit AH213114.

Note: 42 degree cams, larger cylinder and larger bearing is standard equipment on 50 Series, serial number 695101 and later.

60 Series Combines:

Combines with standard variable drives can add an oil pump & cooler with bundle BH84479.

No suggestions other than stated above. See section below on converting feederhouse drives.

Note: 60 Series Heavy-Duty Variable Drive parts will not retrofit on to 50 Series combines. Many components changed, and there is not a belt available with the correct length. Be sure that combine has the Heavy Duty Variable Feeder House Drive.

Note: 60 Series High Torque Variable Drive parts will not retrofit on to 50 Series combines. Many components changed, the feederhouse reverser gearbox won’t fit, and there is not a belt available with the correct length. The High Torque variable belt H220911 will NOT work on Heavy Duty drives.

ALL MODELS: Make certain that the latest parts are being used:

Spring H172267. Spring ends begin and end on the same side and are square cut. Old spring ends are 180 degrees apart and ground flat. Do Not Use Old Spring. see graphic 5877_9.jpg

Cams AH213114 Kit with 42 degree cams. Standard on 695101 and later combines.

Belt H218726 for STS machines and H218728 for Walker machines with Heavy Duty Variable Drive. Should be on all 50 and 60 Series. On later 60 Series, the High Torque variable uses belt H220911, which will NOT work on Heavy Duty drives. Each type of variable drive can ONLY use the specific belt for that drive, do NOT mix & match

When repairing of replacing parts in the torque-sensing unit, use Maximum strength Loctite TY15969 as directed in the repair manual. Best results are obtained by letting the loctite cure overnight in a warm area. Use Prime and Cure TY16285 for faster curing. Loctite is especially important for keeping the inner sheave tight to the input shaft of the reverser gearbox.


As a last resort, convert to a different feederhouse drive, using an approved Bundle, or with part changes.

50 & 60 Series: Convert to Fixed Speed Feederhouse Drive, using Retrofit Kit BH84417 for 50 and 60 Series STS machines. On 60 Series, use H174885 belt and for 50 series use H155998 belt. The feederhouse will run at slow speed only, 520 RPM.

60 and 70 Series (705000 - ) Only: The High Torque variable speed feederhouse drive bundle (BH84447) is available for 9660STS, 9760STS, and 9860 STS machines. The machine must already be equipped with a heavy duty variable speed drive.
 

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also what about adding a adj precleaner like off of 9870 parts breakdown looks as if the only diff is counter weights??? we are pre for 35% plus corn michigan
 
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