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Tech Tips
Disclaimer
Mike's R.V. Repair, Inc. and its officers and employees assume no liability for any incidental or
consequential damages. Use these tips at your own discretion and risk.
Sanitizing Your Water System
(click here for a printer-friendly version)
It is recommended that your fresh water tank be sanitized periodically using a chlorine
solution followed by clear water rinses. Follow the steps below:
- Prepare a chlorine solution by adding 1/4 cup of liquid household chlorine-based bleach solution
to one gallon of potable drinking quality water.
- For every 15 gallons of tank capacity, add one (1) gallon of the chlorine solution
to the empty supply tank. (For example, a 30 gallon tank would require 2 gallons of solution.)
- Fill the remainder of the tank with potable water.
- With the water pump ON, open each faucet long enough for liquid to run out. This will
remove all air from the water system and lines.
- Allow the system (now filled with the chlorine solution) to stand for at least three (3) hours.
Before performing the next step, provisions should be made to allow for drainage of all water from the
fresh water tank.
- Flush the piping by running water through faucets for at least one minute each.
- Turn the water pump OFF.
- Drain the tank and pipes by opening the tank drain valve. Open each faucet to permit water to drain
from each pipe.
- When the tank is empty and each faucet has been opened, drained, and closed, close the tank drain
valve.
- Fill the system with clear, fresh water.
- Repeat steps 6 through 9.
- Partially fill the system with fresh water. Check the tank and system for any chlorine taste or odor.
If any traces of impurity remain, prepare a solution of one (1) quart vinegar in five (5) gallons
of water and place in water tank. Fill the system completely. Agitate the system by moving the vehicle,
then repeat steps 4 and 5.
- Repeat steps 6 through 9 to empty the system.
- If the system is to be used, fill with fresh water. If not, the system is ready for storage.
To help prevent algae and bacteria in your fresh water system, always drain the system (including the
water heater) when not in use.
Note: In addition to this method, there are products that will sanitize your fresh water tanks
without the use of chlorine. This product (part #25049358),
available from our online store, is advertised to kill 99.99% of harmful bacteria.
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State Regulations: RV Combinations (towing a fifth wheel + trailer)
Statues updated for 2008
Before towing a trailer behind a fifth wheel (or any other recreational vehicle combination), be sure to
read the traffic regulations for your state. The following information is from the Minnesota statutes,
section 169.81. For regulations in other states, please visit that state's web site. (A list of state legislature websites can be found
here.)
Minnesota Statutes 2005, 169.81
Subd. 3c. Recreational vehicle combination.
Notwithstanding subdivision 3, a recreational vehicle combination may be operated without a permit if:
- the combination does not consist of more than three vehicles, and the towing rating of the full-size pickup truck or recreational truck-tractor is equal to or greater than the total weight of all vehicles being towed;
- the combination does not exceed 70 feet in length;
- the operator of the combination is at least 18 years of age;
- the trailer is only carrying watercraft, motorcycles, motorized bicycles, off-highway motorcycles, snowmobiles, all-terrain vehicles, motorized golf carts, or equestrian equipment or supplies, and meets all requirements of law;
- the vehicles in the combination are connected to the full-size pickup truck or recreational truck-tractor and each other in conformity with section 169.82; and
- the combination is not operated within the seven-county metropolitan area, as defined in section 473.121, subdivision 2, during the hours of 6:00 a.m. to 9:00 a.m. and 4:00 p.m. to 7:00 p.m. on Mondays through Fridays.
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Erratic Brake Problems
Many times, erratic brake problems can be caused by wiring going through the axle tubes. Over time, the wire rubs bare and contacts the tube causing brake problems. Please contact us to resolve this issue and prevent dangerous driving conditions.
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Issues with Fluorescent Lighting and Dometic Refrigerators
If the ballast in fluorescent lighting has gone bad and requires replacement, it can cause erratic operation in Dometic refrigerators. If you suspect you’re having this problem, please contact us for service.
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Kwikee® Electric Steps
(click here for a printer-friendly version)
Most problems I encounter with electric steps result from a lack of lubrication. If the step doesn't
fall freely when you pull the clevis pin from the linkage arm, it is not lubricated properly.
Lubrication and Maintenance Schedule
NOTE: ALWAYS USE CAUTION AROUND MOVING PARTS!
Clean all mud, salt, and road grime from the step before lubricating. Lubricate all moving parts
(bearings, pivot points, slides, clevis pin, and drive linkage ball) every 30 days with a good
quality moisture and heat resistant penetrating grease. Kwik-Lube® spray grease is specially
formulated to lubricate Kwikee® electric steps and is recommended for lubricating all moving
parts. Check you owner's manual for additional information.
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Rubber Roofs and Branches
Use caution when navigating on roads with overhanging branches. If they hit the roof, they
can get stuck and cause tears in the thin rubber surface. If this happens to you,
contact me, and I can advise on repairs.
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Luke-warm Water and Bypass Valves
In the spring, always check the position of your bypass valves, located behind the
water heater. I receive many calls about luke-warm water, and often the problem is
that the center valve is not closed.
Also, many electrical elements get burned out due to the water system being empty
or near-empty with the valves in the wrong position. After winterizing, I always
turn the valves back to summer use to prevent this.
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Sewer Hose Storage
If you store your sewer hose in the rear bumper of your RV, be sure to protect
the hose by wrapping it in plastic. This prevents the vinyl from rubbing
against the metal bumper which can damage the hose. A better solution is to
use PVC pipe to cap the ends of the hose and store it elsewhere.
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Propane Detectors and Battery Discharge
Sometimes your RV battery may discharge for no apparent reason. In my
experience, the most common source of this is the propane detector. If you're not
using your RV within a week or so, unhook the wiring at the battery terminals.
(Mark the wires so you remember where they go.)
DO NOT UNHOOK THE PROPANE DETECTOR.
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Battery Maintenance
If you are plugged into 120 AC voltage all the time, be sure to check
the water level in your battery every month. Also, apply dielectric grease to
terminals and connections to prevent corrosion.
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Winterizing Tip
I never put RV antifreeze into the fresh water tank if I can access
the inlet of the fresh water pump (drain fresh water tank only). Either purchase
a water pump bypass kit or construct your own hose assembly to hook to the inlet of
the pump and suck the RV antifreeze out of the jug.
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Pilot Light Safety with RV Ovens
Most RV ovens don't use a
thermocouple (a safety device which turns off propane to an appliance if there is
a pilot outage). I recommend that you always turn the oven to pilot
off position when you are done cooking, and light the pilot when you need to use the oven again.
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Refrigerator Inoperable in Cold Weather
I receive many calls about RV refrigerators not lighting or functioning in cold weather
(below 40 degrees F). You need to have the RV heated above 40 degrees and the refrigerator
temperature above this also or the thermostat will prevent the unit from operating (since it is already at
its operating temperature due to the cold). If you use the refrigerator in extreme cold
(below 10 degrees F), you must partially cover the side vent. This is because the liquid
in the unit won't vaporize at such low temperatures.
WARNING: UNDER NO CIRCUMSTANCE BLOCK ANY VENTS IN WARMER TEMPERATURES (ABOVE 10 DEGREES).
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Fifth Wheel Front Landing Legs (Jacks)
When unhooking your fifth wheel, don't use blocking over 1 ½” thick under the front jack legs.
I have seen many trucks damaged by using thicker blocking. If the trailer wheels aren’t blocked,
the trailer could roll off the higher blocks and land on top of the truck box when hitching
up.
NOTE: Always block your tires.
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