Yesterday, it was still raining and the weather service has extended the flood watch. I was definitely in a rainy day mood so I decided to work on this instead of trying to get anything done on the house. Unfortunately, as I was almost finished, the power went out, apparently taking everything I'd done with it. Fortunately, I'd been using Firefox, which was able recover all but the last thirty or so characters I'd typed. However, when the power came on, I was tired from what I'd done so far and stressed out over the apparent loss of work due to the power failure. So, I said, "Screw it," copied and saved everything Firefox had recovered in a text file, and instead just played a Wii game (Endless Ocean, Blue World) that I find relaxing.
Today, having rested, I decided to finish this off and post it.
First, something to consider. Worn kingpin bushings, as with worn ball joints, will cause accelerated tire wear, cutting tire life to as little as 1/3 what it should be. Considering the cost of new motorhome tires, several hundred for kingpin replacement will pay off in extended tire lifespan. (Assuming you have determined that worn kingpin bushings are the cause of your problems.)
So, assuming you greased the kingpins and are not satisfied with your motorhome's handling, what's next?
Take your motorhome to a
reputable shop for a front end alignment. An experienced alignment technician is best able to diagnose handling issues. Your issues may be due to misalignment, bad bearing, suspension problems, worn tierods, worn kingpin bushings, or other suspension and steering problems.
I'd recommend having a load and weight distribution representative of a typical trip in your motorhome when you take it in for the alignment. Although not as great as empty versus loaded in pickups and vans, a difference in load and weight distribution can affect the accuracy of the alignment and the vehicle's handling.
In addition to the usual load-out of food, clothing, gear and toys, you should have half full fuel tank(s), full fresh water tank, and empty black water tank. (Assuming your empty your black water tank regularly during and after trips.)
In particular, if you use one of those hitch-mounted cargo racks (which I hate), make sure it's on the motorhome and laden with a typical load. (Those can drastically change the vehicle's weight distribution on the axles and tires.)
Most shops that cater primarily to automobiles will refuse to do motorhomes. (And, probably shouldn't be doing pickups and vans.) The few that will take in a motorhome most likely do not actually know what they're doing when it comes to motorhomes and some light trucks.
With rare exceptions, those shops, and especially national and regional chains, do not employ good experienced mechanics. Instead, they employ less expensive people with a limited range of experience.
Two personal examples:
One time, I had the brakes bled on our 1970 Dodge Explorer Class A, on a M300 1-ton chassis. (That's classified as a light duty truck, like pickups and vans.) I found a shop, belonging to or affiliated with a national chain, that said they could and would do it. I specifically asked the manager if his people knew the right procedure for bleeding brakes on older motorhomes and he assured me they did. As it turned out, no, they didn't. They overlooked the bleeding the slave cylinders on the frame mounted brake boosters, resulting in air bubbles in the brake lines.
The brakes were actually much worse after they were done than before. Prior to taking it in, I had some initial braking power and had to pump them a couple of times to get full pressure. After they were done, I had absolutely no initial braking power and had to pump the brake pedal eight to ten times to get anything approaching full pressure.
I wound up redoing the job, spending some of my rare -- precious -- summer off-duty time bleeding the brakes again instead of taking my family camping. (I was especially annoyed because our duty section was tasked with supporting three back-to-back military exercises, each lasting ten to fourteen days. That meant a looong summertime stretch of 12+ hour shifts, seven days per week ... and I wanted to spend time with my family camping instead of working alone on the motorhome when we finally did get a break.)
The second example involved a different shop, with the same national chain but located 360 miles away from the first one.
I had retired from the military and was working as an in-residence tutor counselor for the Rural Alaska Honors Institute. My wife took our '90 Ford E-150 van (that's a 1/2-ton light duty truck) in to have the front end aligned. The mechanic told her the tierods were worn and needed to be replaced. Because she had been experiencing some handling issue, and because I wouldn't be able to get to it for several weeks, she told them to go ahead and replace the tierods.
When she stopped by the dorm to tell me what she had done, I told her to go back to the shop and get the old parts. According to her, they went through the dumpster and were only able to find one of the tierods they'd replaced, When I inspected it, it appears to be in good shape.
I can't say for sure whether or not they were trying to rip off a female customer but there was no apparent improvement in the van's steering and handling. As it turned out, the issues were due solely to worn out kingpin bushings. Apparently, their mechanic couldn't see any ball joints so he assumed it was the tierods. (The shop manager wound up eating the cost of the parts, labor, and alignment and refunded all our money.)
I had the kingpins, etc., replaced by a very experienced, semi-retired mechanic that lived a half mile from us and had the van re-aligned by a shop he recommended.
It's worth noting the original kingpins had plastic bushings and lasted around 150,000. The replacement kingpins had metallic bushing (at the insistence of the mechanic), reamed and installed by an experienced mechanic, and have lasted over 350,000 miles. Now, at over a half million miles on the van, the kingpin bushings need to be replaced again. (A different mechanic, who I trust, told me this while aligning the van recently ... and he was apologetic about not being able to do a better job on the alignment.)
So, in light of these horror tales, what do you do?
First of all, even the smallest motorhome, on 1-ton chassis, are really a medium duty truck, even though it's classified as a light duty truck. All other motorhomes are classified as medium duty trucks, just like most commercial trucks. That means you need to find a reputable shop that specializes in commercial medium and heavy duty trucks, rather than automobiles.
So, if, unlike me, you don't have a lot of experience and don't know people to turn to for advice, how do you go about finding such a shop?
The easiest way is to find out where commercial truck drivers go for coffee. It may be a truck stop, a diner, or just a coffee shop but there's always at least one in every town. Go there and hang out. Sooner or later, you'll be able to strike up a conversation and then ask their advice and recommendations. Be sure to insist on paying their tab. Even if the tab is for a full breakfast or lunch, what you get will be worth it in the long run. (Buying coffee, breakfast, or lunch for each other is standard protocol for truckers who know each other ... doing likewise will help you fit in.)
Alternatively, you can use social networking. Ask around until you find someone who knows someone who knows someone, etc., who knows older, larger trucks.
Finally, you could try asking the parts counter people at parts stores and dealers that specialize in commercial vehicles, although their recommendations may be biased, especially if they have their own shops. (As a former parts counter person, I was always hesitant to recommend shops because it could backfire. I would mention, by name, avoiding shops that were well known for shoddy work. However, at most, I'd tell customers, "You might want to check out so-and-so.")
Be sure to make note of the person's name and give it to the shop they recommended. This will tell the shop you're connected to a trucker network, rather than just someone wandering in off the street. Also, they will likely give that person better treatment, making his or her recommendation to you a beneficial act.
Most importantly, go with your gut feeling. If the shop appears organized, reasonable neat, and reasonably clean, there's a better chance their work will be better. I see very good work come out of some shops that are cluttered and messy, and vice versa, but the generality usually holds true.
In my next post, we'll assumed you've decided your kingpin bushings do need to be replaced and look at ways you can reduce the overall cost and possibly do the job yourself.
1970 Explorer Class A on a 1969 Dodge M300 chassis with 318 cu. in. (split year)
1972 Executive Class A on a Dodge M375 chassis with 413 cu. in.
1973 Explorer Class A on a Dodge RM350 (R4) chassis with 318 engine & tranny from 1970 Explorer Class A