C5500 TopKick 4x4 Crew Cab Build

NeverEnough

Adventurer
That's too bad. Is the camper built so it can be moved to a new platform without extensive reworking?

A new TerraStar happened by today, good looking vehicle.

The camper and subframe were designed to work with most US medium duty trucks, as long as the top of cab isn't more than 60" above the rails. I would likely have to modify the CA, bolt on the spring mounts, and mount the cab leveling jacks (which would probably require some custom plates like I did for the Topkick).

Plugged fuel filter can be a huge part of the power problem. Check your cooling stack for debris and oil, I have seen more than one duramax that I pulled the radiator out and found the fins plugged with leaves and such, looked fine on the outside. Make sure all your shrouds and stuff are in place around the cooling units. A slipping trans will cause lack of power and overheating too. I have driven a few duramax pickups with big trailers behind them and they had plenty of power up hills.

I pulled the filter last night and found fine metal shavings around the bottom of the filter where the sensor screws in. My guess is that one or both of the LP fuel pumps in the tanks are shot, there's a ton of crap in the tanks from the upfitter failing to adequately clean them out after all of the grinding before the tanks got coated, or both. I'm ticked that the dealer replaced the filter less than 400 miles back and surely would have seen the same thing if they'd taken a moment to look.

I replaced the filter and took the rig out for a drive and got a few more pieces of info. First, it immediately ran like a new machine. However, I noticed a subtle sound when I put my foot on the gas, and got very distinct at 3000RPM. It sounds like a metal on metal whine or high-pitch rub. I didn't hear it before due to the stereo! And as soon as I pushed over 3000RPM, the same immediate loss of power and belch of smoke. My guess is LP fuel pump going- or gone- bad. I'm taking it in tomorrow to have the entire fuel supply system checked out. As for running hot, the dealer said they did a complete inspection of all cooling system components and they checked out except the fan clutch. Anyway, I'll try to work through the issues before swapping the truck out for something else. Thanks for the info!
 
I drove the truck and camper over Parley's Summit on I-80 to Park City on Saturday (101 degrees when I left the valley), then repeated the trip the next day with the trailer in tow. There are more brutal climbs in the West, but Parley's is a pretty good indicator of what to expect on a long uphill.

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The camper and the trailer did great. They ride well and nothing's coming loose or falling off. :) I deployed all the moving parts when I got home to make sure everything is working as it should.

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It was the first time I'd tested all of the jacks together, and they're all working fine. Some of the drawer and cabinet catches need to be adjusted, and the inverter configuration isn't quite dialed in, but it's getting close. I've also decided to extend the tongue of the trailer 16" to give me a better turning radius once I swap out the ball coupler for the pintel/lunette.

I really haven't driven the truck since last summer, except for back and forth between the shop and the storage unit a few times. It was running hot over climbs last summer, but I never boiled it over. I just backed off and took my time. I had the same experience on Saturday and Sunday. I couldn't do the two steepest sections of the climb at more than 35mph in order to keep it at the 3/4 (230?) mark or cooler on the gauge. I can't see any coolant leaking, and the cap appears good. I'm taking it in on Thursday to have them check the entire cooling system to see if something's up with the T-stat, clutch fan or maybe just a gunked up radiator. It maintains normal temp on the flats, even at 65-70. If any of you have experience with Topkicks, let me know if you've had similar issues.

This thing is unbelievable!
 

Ford Prefect

Expedition Leader
Would you be so kind as to add some interior photos of the cab over, both up and down? I do not know if I have seen that, and having spent time in the Eco-Roamer I am interested in how you did it differently.

Thanks
 

IdaSHO

IDACAMPER
Sorry to hear about the motor problems.

Unfortunately, I have to say that out of our entire medium duty and heavy duty fleet of trucks at work, the Top-Kicks are by far the more problematic, and more costly to keep on the road. Ive got the logs and records to prove it. Even our VT365 powered rigs (though problematic) have proven to provide a lower $/mile operation than the Duramax or CAT powered Top-Kicks.

You have probably posted it in this great thread, but what motor is in your truck? I might be able to shed some light on the problems you are having...
 

Dgurley2000

Adventurer
Seatbelts

I've read through the thread a few times and have enjoyed learning about construction with composites and camper design. It's also been good to hear some of the challenges you've faced and how you solved them.

I may have missed it - is your entire family able to fit in the cab while traveling? Or, are some of the seats in the camper equipped with seat belts? If there are seats with belts, did you tie them into the aluminum sub-frame?
 

NeverEnough

Adventurer
Sorry to hear about the motor problems.

Unfortunately, I have to say that out of our entire medium duty and heavy duty fleet of trucks at work, the Top-Kicks are by far the more problematic, and more costly to keep on the road. Ive got the logs and records to prove it. Even our VT365 powered rigs (though problematic) have proven to provide a lower $/mile operation than the Duramax or CAT powered Top-Kicks.

You have probably posted it in this great thread, but what motor is in your truck? I might be able to shed some light on the problems you are having...

Yeah, I've talked to guys that love them and those that hate them. The fan clutch was over 500 bucks and the fuel sending unit is almost as much- pricey parts. I've got the 6.6 Duramax LLY. Matt at Gillette Diesel in Bluffdale, UT has done chips on a dozen C5500's with good results. We're going to try that next week, assuming the hot running goes away with better fuel pressure.

I may have missed it - is your entire family able to fit in the cab while traveling? Or, are some of the seats in the camper equipped with seat belts? If there are seats with belts, did you tie them into the aluminum sub-frame?

The cab can seat 6, which is our immediate family head count, with a ton of leg room. I've held off on upgrading the cab interior, as well as cutting the "crawl through" until I've convinced myself to stick with the Topkick. I didn't put any seatbelts in the camper body. The only mechanical connections of the camper body to the subframe are the 6 safety latches. Maybe I'm reckless, but I've never required passengers to buckle-up in a motorhome for all sorts of reasons. It's inconsistent of me, since I'm Mr. AGATT when it comes to motorcycles.

I'll snap some photos of the latches and the cabover when I get back in town, as well uber-nice bathroom.
 

Dgurley2000

Adventurer
The cab can seat 6, which is our immediate family head count, with a ton of leg room. I've held off on upgrading the cab interior, as well as cutting the "crawl through" until I've convinced myself to stick with the Topkick. I didn't put any seatbelts in the camper body. The only mechanical connections of the camper body to the subframe are the 6 safety latches. Maybe I'm reckless, but I've never required passengers to buckle-up in a motorhome for all sorts of reasons. It's inconsistent of me, since I'm Mr. AGATT when it comes to motorcycles.

Appreciate the response. I have five in my family so I'm curious about seating arrangements.

Curious - I noticed your post that you're not an engineer or architect by profession. Sounds like you might run data centers? Just curious what your vocation is and how it adds to your obvious ability to architect/engineer an incredible camper?
 

LukeH

Adventurer
Hi,
Reacting late to the "bearings on a stick" solution because I've only just started looking at slides for mine.
Have you thought about using the little rollers you find on the fork end of pallet trucks? They have phenomenal load ratings and are smooth rolling with some kind of hard ploymer coating to not damage floors.
My version of your rear slide out is going to use them but with the beams underneath the box rather than on top.
The slide will also only contain a sideways bed, so much smaller.
HTH
Luke
 

NeverEnough

Adventurer
Appreciate the response. I have five in my family so I'm curious about seating arrangements.

Curious - I noticed your post that you're not an engineer or architect by profession. Sounds like you might run data centers? Just curious what your vocation is and how it adds to your obvious ability to architect/engineer an incredible camper?

I ended up in IT, but I made a lot of tree houses and forts when I was a kid. I like building stuff, for better or worse. This one has been a challenge, however- too many moving parts on a moving platform!

LukeH said:
Hi,
Reacting late to the "bearings on a stick" solution because I've only just started looking at slides for mine.
Have you thought about using the little rollers you find on the fork end of pallet trucks? They have phenomenal load ratings and are smooth rolling with some kind of hard ploymer coating to not damage floors.
My version of your rear slide out is going to use them but with the beams underneath the box rather than on top.
The slide will also only contain a sideways bed, so much smaller.

The roller bearings under the slide (PCB) actually work just fine, as the load is distributed over five assemblies. The beams that support the cantilever were far more challenging. The original design used two pairs of beams, lower and upper, to support the 102" extension, but it proved too difficult to to without binding issues. Beams underneath are a better solution for many reasons, but it would've required me to either reconfigure all of my "basement" components (tanks, plumbing, storage bays), or mount them on the truck chassis rails (which would eliminate the ability to deploy the slide-room unless it was on the truck). If I were to do it over again, I would've stuck with another of my first designs, which was a simple fold-down support frame with legs to deploy the slide on. I'll probably tweek the rig this fall to add that on as I work on the back platform.

If your slide is moving less than 50" and weighs less than 1500lbs, I would highly recommend using LCI/Schwintek's slide hardware. It is what I used for my side slides. Fast, light, and easy to install. PM me if you need more info. I only did custom for the big slide because nobody had an engineered solution for 102" travel stroke that would work easily or cost effectively in a camper.
 

NeverEnough

Adventurer
A few more pics, another enhancement...

It's been a while since I posted. The rig has been out on several trips to Flaming Gorge on the Utah/Wyoming border. We do 5-6 outings there every summer, and is the type of camping that I designed the rig for. So far, so good. Next week we'll start heading down to the Swell for fall riding and canyoneering. It is a very, very comfortable and functional setup for a large family and friends. I haven't made time to get the Topkick in for more diagnostics, however. As long as I don't push the hills at highway speeds, it does just fine. I still want to see if the situation can be improved before I cut the crawl-through.

I neglected to post shots of the bathroom and cabover, so here's a few. Sorry about the iPhone shots; I really need a wide-angle lens to do a decent job. It's a much larger bathroom than most, but it makes for a happy wife, so it's well worth the space! This is looking straight in the door:

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Over the years, I learned that my family rarely uses the shower- except my wife loves to use it for extra luggage storage. So I built the shower to hold to snap-in cargo shelves. The lower one is in place for this shot. They're held in using simple ball-catches and are easily popped out if someone wants to take a shower.

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The shower floor had to be about 7 inches above the main floor to accommodate the trap-less valve, as well as provide maintenance access, so I used the rest of the space for large drawer that holds all of the central vac accessories. The black bag on the shower floor holds 4 folding chairs for the dining area.

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Central vac, by the way, has been awesome. It makes keeping the rig clean a snap.

There's a ton of storage in the bathroom vanity. It also provides access to the water heater and propane furnace for maintenance/service.

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The upper cabinets are also very spacious and provide lots of extra storage.

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The pop-up cabover has become a favorite feature. It makes for a very comfortable, quiet bedroom, and makes accessing the roof deck a snap. There are inside and outside brush seals on all moving surfaces, and they do their job very well. The cabover is accessed with a swing-up, removable aluminum step assembly. It swings up to allow access to all of the storage cubbies, as well as to allow for the crawl-through to the cab (when it gets installed).

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The cabover can be closed off with it's own little door.

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Not a great shot, but you might be able to get a feel for the head-room, which is about 6'8" at the peak. I still need to cover the folding-wall hinge in nylon fabric, and the door isn't shut tight (it also needs to be painted). The console in the corner has the radiant floor thermostat, 120VAC and 12VDC outlets, ceiling fan controls, and light controls. The upper duct is for the A/C and the lower duct is for the propane furnace. Both work surprisingly well, even with single ducts. The step ladder is the current solution for roof access. I'll eventually fab up a more elegant solution, probably this winter.

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This shot is taken standing in the rear passenger corner of the room. There are two cushions stacked on top of each other, which are unstacked when you need a queen-size bed.

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And from the driver's side. The gas shocks make raising the roof easy. The red De Staco clamps on each side secure the roof in drive position.

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I also got to work, finally, on my combination motorcycle lift/carrier and slide-out support. This was part of the original design, and I've decided to give it a try. The frame is raised and lowered by two 2000lb. winches, which will also be the mechanisms for raising and lowering the motorcycle platform. The whole assembly bolts onto the camper body (not the chassis) and can be removed in about 20 minutes.

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The rear jacks, which are normally mounted on the back of the slide-out room, slip into "cuffs" that pivot 90 degrees. V-groove wheels mount where the jacks normally mount on the back of the slide room, and roll on the angle welded on top of the double Unistrut beams on each side of the frame.

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Now that I know the cable/winch assembly works just fine, the jacks rotate, slide, and support as intended, and the room moves in and out nice and smooth (way better than when it cantilevers), I can run the wiring, weld the corners and gussets, and fab up the motorcycle platform. Then another trip to the powder coating shop!
 
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Ford Prefect

Expedition Leader
I'm always impressed with this rig and how well it turned out

Ditto

I think that the cab over, and the steps are an excellent design.

I noticed on the top rear of the cab over roof there is a lot of light seeping in. Is there a way to seal that off? Do you expect wind to come in, IE cold wind and snow in the winter months?

Looks like a great room, and I think that your choice of the steps is a wonderful way to work it, perhaps the best I have seen as they can also add to the ability to seal the back of the truck off from the cab when you ship the truck, or even just have it into the shop for work.

That bath is amazing! I love the shower ideas, no one really uses that thing unless they are gone for a while anyhow. Plus the drawer under, wow, why doesn't everyone do that!!! It was a stroke of genius. People on here always talk about budgeting space and that you can never have enough. That is great.

Did you put in floor accessed cubbyholes? I have seen lots of those on trucks, between the frame rails, to have a few six inch deep boxes all along the truck to store more stuff and I do not recall if you did that or not.

Anyhow, brilliant work, and thanks again for sharing.
 

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