Abby’s Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > John Deere 928E issues
Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions |
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Ozz0830
Joined: Dec 20, 2008
Points: 5
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John Deere 928E issues
Original Message Dec 20, 2008 3:15 pm |
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Hi all,
First snowblower, and first post to go with it!
I just purchased a John Deere 928E at the local John Deere dealership. I figured that spending the extra cash on a JD would get me a top notch machine with top notch performance.
I have used it twice. The first time out the motor began jerking a few different times, but would then start behaving again.
The second time out (this morning), it jerked a couple times, but then the chute started having trouble turning. When turning it to the right, it would only go about 3/4 max and then get stuck, where I couldn't turn it either way. I would grab and turn it enough for the gear to start working again and it would turn the OTHER way, but still get stuck when going to the right.
After finishing up, I decided to take a look at it a few hours later, and now it has ceased to work altogether. We are supposed to be getting another large snowfall Sunday /Monday.
Anyone else have this problem? Anyone have any suggestions? Anyone else feel as though they got taken for a ride when they bought a John Deere?
Thanks for any help anyone can offer.
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Ozz0830
Joined: Dec 20, 2008
Points: 5
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Re: John Deere 928E issues
Reply #11 Dec 30, 2008 5:59 pm |
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Out of curiosity.... Does anyone know the HP rating on the 928E? When I purchased it, the John Deere associate told me 9HP (JD dealership), the Lowe's technician/mechanic told me 11.5 HP. I emailed John Deere, and they wouldn't give me an answer. They told me they measured the power in CC's, not HP.
I figure someone on THIS forum MUST know the definitive answer!!
Thanks!
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pvrp
Joined: Nov 14, 2008
Points: 151
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Re: John Deere 928E issues
Reply #12 Dec 30, 2008 6:56 pm |
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I emailed John Deere, and they wouldn't give me an answer. They told me they measured the power in CC's, not HP.
Even though you can't describe power in cc's this might have been the good answer just the same :-) There's some question about the different horsepower ratings for engines with the same displacement (cc's, cubic centimeters) but no one is arguing over the displacements themselves, and usually more displacement equals more power. I'd guess your engine is more like 11-12 hp than something less. Paul
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MacLorry27
Joined: Dec 23, 2008
Points: 54
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Re: John Deere 928E issues
Reply #14 Dec 30, 2008 7:37 pm |
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The JD 928e uses the B&S 305cc Snow Series engine model number 200000. This engine is rated at 13.5 ft-lbs. of torque in accordance with SAE J1995. Under that standard torque is measured at 3060 RPM and horsepower is measured at 3600 RPM. If we assume a flat torque curve, which is not likely, you can calculate horsepower using the following equation. HP = Torque ft-lbs. x RPM / 5252 Substituting the values you would get the following. (13.5 x 3600) / 5252, which is 48600 / 5252, which is 9.25 horsepower. It’s likely that torque is less than 13.5 at 3600 RPM, so I would round this off to 9 horsepower. Now you know where the 9 in 928 comes from, and the 28 is the width in inches. By the way, to get 11 horsepower you would need 16.0 ft-lbs. Torque at 3600 RPM. To get another 2 HP out of this engine at the same RPM requires getting more air/fuel into it. That usually means either a bigger carburetor and/or a less restrictive exhaust system and/or a different cam profile. However, B&S could just put a stop or different linkage on the 9 HP engine that prevents the throttle from opening 100%. Why, it’s all in marketing. Customers are willing to pay more for more HP, but it’s cheaper to have fewer engine models. The solution is to build a 11 HP engine and then limit the maximum throttle setting for the 9 HP model. Then again, maybe there is no difference at all and the 9 HP is really the 11 HP engine, but it’s only marketed as 9HP. You would need a dynamo to figure it out.
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borat
 
Joined: Nov 10, 2007
Points: 2692
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Re: John Deere 928E issues
Reply #15 Dec 30, 2008 8:06 pm |
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The JD 928e uses the B&S 305cc Snow Series engine model number 200000. This engine is rated at 13.5 ft-lbs. of torque in accordance with SAE J1995. Under that standard torque is measured at 3060 RPM and horsepower is measured at 3600 RPM. If we assume a flat torque curve, which is not likely, you can calculate horsepower using the following equation. HP = Torque ft-lbs. x RPM / 5252 Substituting the values you would get the following. (13.5 x 3600) / 5252, which is 48600 / 5252, which is 9.25 horsepower. It’s likely that torque is less than 13.5 at 3600 RPM, so I would round this off to 9 horsepower. Now you know where the 9 in 928 comes from, and the 28 is the width in inches. By the way, to get 11 horsepower you would need 16.0 ft-lbs. Torque at 3600 RPM. To get another 2 HP out of this engine at the same RPM requires getting more air/fuel into it. That usually means either a bigger carburetor and/or a less restrictive exhaust system and/or a different cam profile. However, B&S could just put a stop or different linkage on the 9 HP engine that prevents the throttle from opening 100%. Why, it’s all in marketing. Customers are willing to pay more for more HP, but it’s cheaper to have fewer engine models. The solution is to build a 11 HP engine and then limit the maximum throttle setting for the 9 HP model. Then again, maybe there is no difference at all and the 9 HP is really the 11 HP engine, but it’s only marketed as 9HP. You would need a dynamo to figure it out. If there is a true difference in power between engines of the same displacement, shouldn't the part numbers vary? If the more powerful engine has a different cam or carburetor would that not be reflected in the part number? If I had paid for an 11 h.p. engine and was supplied a carb or cam for an 9 h.p. I wouldn't be too happy with that. If the part numbers don't change from one rating to the next, one would have to assume that the engine is either at one end of the power spectrum or the other right? By the way, my engine is rated at 9.5 h.p. From my experience with other engines in this class, It's a pretty potent 9.5.
This message was modified Dec 30, 2008 by borat
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MacLorry27
Joined: Dec 23, 2008
Points: 54
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Re: John Deere 928E issues
Reply #16 Dec 30, 2008 9:41 pm |
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If there is a true difference in power between engines of the same displacement, shouldn't the part numbers vary? If the more powerful engine has a different cam or carburetor would that not be reflected in the part number? If I had paid for an 11 h.p. engine and was supplied a carb or cam for an 9 h.p. I wouldn't be too happy with that. If the part numbers don't change from one rating to the next, one would have to assume that the engine is either at one end of the power spectrum or the other right? By the way, my engine is rated at 9.5 h.p. From my experience with other engines in this class, It's a pretty potent 9.5. I don't know what method B&S uses to change the HP of otherwise identical engines, but it could be nothing more than some linkage going into one hole of a plate attached to the shaft of the throttle butterfly on the 9 HP engine and that same linkage going into a different hole on the 10 or 11 HP engine. You wouldn’t be able to tell this from looking at the part numbers as they are all the same, it’s just what hole the linkage goes into. On the 9 HP engine, that set up limits the throttle opening to just 82% of full open, which knocks off 2 HP. I don’t know if this is how B&S does it, but it would explain how otherwise identical engines can have different power outputs. The advantage for B&S is they can easily span a large HP range with just a few engines, which means they can reduce the cost of those engines. It’s also means dealers have to keep fewer parts in inventory. Likely there’s an easy means to get the maximum power out of one of these engines, but if you have a drive system, impeller and auger designed to handle 9 HP it’s really not a good idea to put 11 HP into it. Then again, as I said in Reply #14, "maybe there is no difference at all and the 9 HP is really the 11 HP engine." I certainly wouldn’t fee ripped off by getting 11 HP for the price of 9 HP if the rest of the machine can handle it.
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Spaceman
I wish I was half as good a person as my dogs think I am.
Location: Burlington Ontario Canada
Joined: Jan 23, 2009
Points: 3
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Re: John Deere 928E issues
Reply #17 Jan 23, 2009 9:50 am |
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I bought a 928E from Lowe's in Hamilton Canada in November. I was told by the salesperson that John Deere does not allow retailers to assemble the units. They're all assembled at the John Deere dealership in Smithville.
I was told at the John Deere dealership that the engine is rated between 9 - 10 H.P. They are no longer allowed to rate their units in H.P. because of law suits in the U.S. It appears people have launched law suits over manufacturer's "rated horsepower".
I was told by a salesman at John Deere that the units are made in Illinois by B&S to John Deere specifications. John Deere stopped making snowthrowers a few years ago after several winters of low snowfall. They didn't sell enough units to justify an assembly line.
If you have problems, take your snowthrower directly to a John Deere facility. I had trouble removing a broken shear pin. The mechanic showed me a trick, and gave me some useful info about the machine. I was treated very well there.
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Spaceman
I wish I was half as good a person as my dogs think I am.
Location: Burlington Ontario Canada
Joined: Jan 23, 2009
Points: 3
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Re: John Deere 928E issues
Reply #18 Jan 23, 2009 9:58 am |
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Does anyone have any experience with tire chains on their snowthrower? I find my wheels start to slip when I run them over packed snow, would tire chains help ?
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Paul7
Joined: Mar 12, 2007
Points: 452
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Re: John Deere 928E issues
Reply #19 Jan 23, 2009 12:47 pm |
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Does anyone have any experience with tire chains on their snowthrower? I find my wheels start to slip when I run them over packed snow, would tire chains help ? Before Snow Hog tires became standard I used chains all the time. The tires before snow hogs were generally narrower and didn't have deep treads. Chains fit and worked great. With machines today that use snow hogs you have to be careful of two things when attempting to use chains. One, make sure that you have enough clearance between the tires and the snow blower or the chains will rub against the machine and potentially damage it. Two, chain links of certain designs have a tendency to slip between the knoby treads on snow hogs, minimizing their effectiveness. Snow hogs without chains should be adequate in most instances. The exceptions are icy slopes and really packed EOD snows.
This message was modified Jan 23, 2009 by Paul7
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JGtravelor
Joined: Jan 14, 2011
Points: 13
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Re: John Deere 928E issues
Reply #20 Apr 17, 2016 11:23 am |
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I've had the John Deer 928E for years. Good machine but you absolutely have to read the directions and do preventative maintenance. I read the complaints and all were preventable except the guy that got a new one that wasn't assembled correctly but then he didn't oil nor grease it when he got it home. Traction "won't go Forward: Per the Directions when your done with the snow blower at the end of the season you must loosen the tension of the belt so it doesn't stretch out. Then you must remember to tighten the adjustment on the drive rod at the beginning of the Winter. This will save you burning out a $28 dollar belt. The second cause for no or slipping dive is debri from mice in between the friction disc and drive plate. Remove the rear maintenance plate and Tilt the snow thrower forward against a solid wall. A ruler wrapped in a rag soaked with alcohol will quickly clean the friction plates. Good tension with clean friction plates will make it drive perfectly if the adjuster goes to the correct gear speeds. The only exception is after many years of use the brass bearing is not really an axil bearing but a brass bushing. These $55 bushings are just hammered in place. There was no evidence that the factory ever greased them. The drive chain pulls the axil rod forward and the round hole becomes elliptical and the axil becomes sloppy and can't adjust the traction drive with the axil moving around. Put 2 news ones and greased the shaft before I slid it through. starts right up and worked fantastic again last year.
Always spray white lithium grease or silicone spray on moving parts and silicone spray on moving handles slide cables so the don't rust. At the beginning of the season Spray TFE (Teflon Dry lubricant on the augur, impellar and inside snow chute so the wet snow doesn't stick. Oil or White lithium grease on the chute turn mechanism and angle adjust.
HP the answers was correct the only difference between the 11HP and 13 HP is the air fuel set up on the carburetor. I saw a U-tube clip on how he changed a jet to get more fuel.
However the reason people thought they needed more horse power was because they were having trouble throwing wet snow especially when there is only a few inches.
The answer for this is simply that the wet snow isn't getting packed in the second stage. Simply drive into the snow and pulse the throw handle to let the snow build up and get pressurized, then it will shoot out. With the Teflon dry lubricant so the snow doesn't stick helps a lot.
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