3 tons
NV.
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Joined: 03/13/2009
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Why reintroduce the older style a quite capable motor when the alternative is to make life difficult and sell new jacks?? As with mostly non-existent tech-support, leaving customers stranded (for fast bucks $$) is ubiquitous cultural SOP by most OEM manufacturers…
3 tons
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mkirsch
Rochester, NY
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Joined: 04/09/2004
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StirCrazy wrote:I may not be understanding but why do you need 4" clearance above the motor to the overhang? wouldn't 1" clearance be more than enough?
Steve
He has 4" of INTERFERENCE, as in, the top 4" of the motor hits the cab overhang. I'm sure any clearance at all would be welcome at this point.
Putting 10-ply tires on half ton trucks since aught-four.
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bigfootgrey
Connecticut
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I also spoke with Bigfoot Industries regarding the clearance issue for the new jack motors and they had to alter the jack mount to the swing out brackets to achieve clearance. This lowered the jack height to the road a few inches. Happijac says the new style motors are 8” above the top of the jack
2011 Ford F-350 PSD SC DRW
2008 Bigfoot 25C-10.4E
Firestone airbags - torklift stable-loads,fastguns,Talons Rancho rs 9000XL’s.
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HMS Beagle
Napa, California
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Joined: 08/22/2003
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bigfootgrey wrote:I also spoke with Bigfoot Industries regarding the clearance issue for the new jack motors and they had to alter the jack mount to the swing out brackets to achieve clearance. This lowered the jack height to the road a few inches. Happijac says the new style motors are 8” above the top of the jack
I have a Bigfoot 10.4, 2008, same as you. I recently replaced the jacks with 4800, and at the time measured the motor clearance thinking I might need new motors. As I recall, I decided they would fit. My old motors still worked so I didn't change them. I'll measure them again but pretty sure you don't have an issue.
Bigfoot 10.4E, 2015 F350 6.7L DRW 2WD, Autoflex Ultra Air Ride rear suspension, Hellwig Bigwig sway bars front and rear
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StirCrazy
Kamloops, BC, Canada
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Joined: 07/16/2003
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mkirsch wrote:StirCrazy wrote:I may not be understanding but why do you need 4" clearance above the motor to the overhang? wouldn't 1" clearance be more than enough?
Steve
He has 4" of INTERFERENCE, as in, the top 4" of the motor hits the cab overhang. I'm sure any clearance at all would be welcome at this point.
ok I must have read that wrong...
2014 F350 6.7 Platinum
2016 Cougar 330RBK
1991 Slumberqueen WS100
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bigfootgrey
Connecticut
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HMS Beagle wrote:bigfootgrey wrote:I also spoke with Bigfoot Industries regarding the clearance issue for the new jack motors and they had to alter the jack mount to the swing out brackets to achieve clearance. This lowered the jack height to the road a few inches. Happijac says the new style motors are 8” above the top of the jack
I have a Bigfoot 10.4, 2008, same as you. I recently replaced the jacks with 4800, and at the time measured the motor clearance thinking I might need new motors. As I recall, I decided they would fit. My old motors still worked so I didn't change them. I'll measure them again but pretty sure you don't have an issue.
I replaced my front jacks with4800’s. The rear jacks are original 4150’s from 2008. If the clearance is ok for the fronts to swing in under the cab over that would be great. Does the control board need to be changed? Mine is original,with the cord.
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bigfootgrey
Connecticut
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![[image]](https://i.imgur.com/4rqFkl7l.png)
This is what e trailer shows for clearance measurement.
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HMS Beagle
Napa, California
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Joined: 08/22/2003
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bigfootgrey wrote:HMS Beagle wrote:bigfootgrey wrote:I also spoke with Bigfoot Industries regarding the clearance issue for the new jack motors and they had to alter the jack mount to the swing out brackets to achieve clearance. This lowered the jack height to the road a few inches. Happijac says the new style motors are 8” above the top of the jack
I have a Bigfoot 10.4, 2008, same as you. I recently replaced the jacks with 4800, and at the time measured the motor clearance thinking I might need new motors. As I recall, I decided they would fit. My old motors still worked so I didn't change them. I'll measure them again but pretty sure you don't have an issue.
I replaced my front jacks with4800’s. The rear jacks are original 4150’s from 2008. If the clearance is ok for the fronts to swing in under the cab over that would be great. Does the control board need to be changed? Mine is original,with the cord.
OK, I just measured it again. I have 8 1/2" from the top of the jack tube to the camper overhang. From the PantherRV website (where I bought the 4800 jacks):
"Will not work with every camper
Requires 8-1/2" of clearance from the top bolt to the top of the motor. Some cab overs don't allow for the clearance necessary to install the motor on the front jacks. Please measure carefully before ordering."
The top bolt is the one fixing the motor to the jack. From that bolt, I have 9 1/8. It is the same both sides. From that description I'd say I have enough. What you posted shows 9 1/8 for that measurement, not 8 1/2". If that description is correct it would just touch. You might be able to drill new holes on the dually bracket, probably need to be 3/4 down to have clearance betwen the two 3/8 hole sets. It might be fine just touching - this is in the folded and unloaded position after all.
The board doesn't really care, it just puts out a reversing current. From the descriptions of everything, the 4800 jacks with the new motors might draw more current at the limit, and might blow fuses in the old board (15A vs 20). The old motors have a ball clutch in them which slips in the event of overload. Apparently the new ones don't, and rely on a current sense scheme in the board to prevent overload. This would not bother me, I'd just be careful at the ends of travel - I am anyway. The 4800 jacks may require a little more current than the 4150 as they are Acme rather than ball screw. But they seem to run just about as fast as the 4150 that I took off. The load rating on the 4800/new motor is quite high, and a 10.4 doesn't push that limit at all.
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Bedlam
PNW
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Joined: 06/13/2012
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What about putting the new motors on the rear if they don't clear the front? You still have three good old ones that could serve the front jacks.
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bigfootgrey
Connecticut
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Thanks Beagle
I’ll measure when it’s back on the truck. We’re camping with it off the truck for the next couple of weeks
Should be close but I might drill if I have to but it is only when folded in. Good to know about the board. Always careful at end of travel too. I could move the rear motors to the front as long as I can run new and old together on the board
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