Re: U320 chassis service
Reply #4 –
I suggest you get a set of safety blocks (look at how to work safely under your coach) and then get familiar with the chassis via lubrication points, trace out the basic air system, find all the filters (oil, air, water, fuel, etc.), ID the lubrication points on the disc brakes, which require special lube and procedure), locate the big sheet metal chase that houses coolant, fuel, wiring that runs north and south at the top of the storage bays (don't open it up). Find the start and coach batteries and look at the condition of the connections. Study the radiator and ID the two cooling fans run off the hydraulic pump that also does your power steering. Don't panic if you see some evidence of weeping around the hydraulic fan motors. Just keep an eye on the huge hydraulic oil reservoir at the back of the engine opening. If slowly losing oil check first at the power steering box in the most forward bay on the driver's side.
The search feature on the forum is your friend and nemesis. The more you use it the more refined your search becomes. Chuck from Chuck and Jeanne is the search whiz so PM him if you need a few tips on how to search.
Raising the coach: Start engine, run air up to cut off, push and hold raise button on HWH control panel. Watch the air gauges and when they start build back air to the normal cut off your coach is as high as it will ever get on the bags. Turn off the engine while keeping the raise button engaged, then install your safety stands between the frame rails. Maximum safety achieved by lowering coach to safety stands so they are engaged. Some coaches don't require you to keep holding the raise button until engine shut off, but that is the sure way to raise it.
Once you've found stuff and traced various system around the chassis you might want to find your two main set of 12 volt relays, passenger side of dash and in main storage bay. Find and record the engine and transmission serial numbers, you will need those. Now you are in a position to talk with a truck repair shop about chassis service, repair, or diagnosis. Also locate your data port under the dash for communicating with your engine computer if you have one.
Beware, your chassis batteries will go dead in about a week if you don't have a means of charging them. Foretravel did not provide a means for charging them while parked, but many owners have installed various charge systems. Your house batteries are easily charged with shore power, but the chassis batteries are another animal.
Good luck! You have a new hobby - comparative coach anatomy and forum surfing.
Topic: U320 chassis service