| Author | Message | ||
| John Lacey (Junkman42)
Registered Member Username: Junkman42 Post Number: 3 Registered: 3-2007 Posted From: 204.49.140.155 Rating: N/A |
Thanks for the input on the air bags. I now have a couple more questions. What tire pressure is proper for this mci 7. I have mich tires that say max pressure is 120 lbs. The next question is about My transmisson. The tranny is supposed to be a allison ht70. It is a 6 speed and when it goes into top gear it seems to be very abrupt. It appears to slam harder if You back out of it just before it shifts. Can anybody tell Me where I might find a manual. What fluid does this thing take. Thanks for the input in advance. | ||
| carl white (Carl_mci_9)
Registered Member Username: Carl_mci_9 Post Number: 11 Registered: 1-2007 Posted From: 208.108.100.213 Rating: N/A |
John: There will be a few opinions about what type of fuild to use. I have an allison ht 740. It is a four speed (seems like a 5 speed) and if this is the transmission you have the best advice I can give is make sure the fluid level is full. If it gets low the 4 gear clutch will go out and this also controls the reverse. I found this out the hard way. carl | ||
| Bob greenwood (Bob_greenwood)
Registered Member Username: Bob_greenwood Post Number: 774 Registered: 7-2006 Posted From: 64.136.49.228 Rating: N/A |
There will be arguements here about tire pressures.... if you can keep them all at 100 you are lucky....there will be people argue with me about this...you should 'bump' your tires EVERY time before you get in the bus....this means get something big... I use a 1/2 inch breakover bar...you should be able to hit the tred of a tore pretty hard & it will sing back to you...if it goes 'thud' you have a problem,you cannot | ||
| Chris Peters (Chris_85_rts)
Registered Member Username: Chris_85_rts Post Number: 11 Registered: 11-2006 Posted From: 66.194.150.45 Rating: N/A |
I don't see why there are agruements about tire pressure. Strictly speaking, each tire manufacturer will provide a table of tire pressures based on tire loading. You should weigh each corner of your coach when loaded as you expect it to be used, and then inflate to the manufacturers recommended tire pressure. If you then decide to change from the recommended tire pressure based on tire load, based on someone else opinion of what they like to run, and you have a blow out, don't expect the tire manufacturer to support you in any way. | ||
| Douglas Wotring (Tekebird)
Registered Member Username: Tekebird Post Number: 137 Registered: 10-2004 Posted From: 71.59.75.212 Rating: N/A |
exactly, inflate to manufacturer's specs based on load. | ||
| Cameron Jones (Crazy71)
Registered Member Username: Crazy71 Post Number: 47 Registered: 12-2006 Posted From: 75.179.153.89 Rating: N/A |
What Chris said is true and the proper way to do it.....but the tire manufacturer is not going to support you in any way regardless. The only chance you have is if you are a regular at a certain tire shop....and THEY decide to take care of you in an instance of an individual tire. They can defect it out and get credit pretty easy or just eat the cost as good customer service....but the manufacturer almost alway "weasels" and places blame somewhere so as to keep them from losing any profit. | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1212 Registered: 12-2000 Posted From: 71.195.112.181 Rating: N/A |
John - The HT70 is a five-speed transmission with a lock-up torque converter. What feels like another shift is the converter locking up. Does the shifter say "R-N-D-4-3-2-1" or similar? You can use either the same oil you use in the engine (Straight 40wt CF-2) or you can use Dexron ATF. Either/or, no mixing allowed. Transmission oil level should be checked with the engine idling in N. Bob's right. . . sort of. You can bump a tire with a bat of some type, and an inflated tire will "ring", whereas a deflated tire will thump. But that doesn't mean that the inflation pressure is correct for your coach based on the vehicle's weight! It just means that the tire's not flat. As others have stated, run your coach across a set of truck scales with the capability of weighing each axle individually, in "on the road" condition. Will probably cost you $6 - $10 or so. Based on axle weight, divide each weight by the number of tires on each axle, and that will give you the amount each tire's supporting. Add in a "fudge factor" (I use 200 lbs./tire), and then look up your tire's specs and load chart on either the website or at a dealer to find the correct inflation pressure for the weight being carried. Adding an additional 5 - 10 psi won't harm anything, unless you exceed the maximum rated inflation pressure, and some folk say that this slight increase has a small positive effect on fuel mileage (which is kind of a moot point when you've pushing a vehicle with the aerodynamics of a brick down the road at 70 mph). Finally, if you haven't already, pick up one of the little infrared hand-held thermometers. They're great for checking tire temperatures after a run, makes it really easy to spot a problem early. FWIW & HTH. . .  | ||
| larry currier (Larryc)
Registered Member Username: Larryc Post Number: 60 Registered: 2-2007 Posted From: 207.200.116.13 Rating: N/A |
John, when you check tire temps at the end of a run, cold is bad and hot is good. If your transmission isn't broken, Lucas makes a product for automatic transmissions that will help it shift smooth I use 1 quart. Also Allisons don't shift right if they are sucking any air. There is an O ring at the top of the pickup tube inside the pan. If it dries out or wears out it will present symptoms like hard shifts. | ||
| George M. Todd (George_mc6)
Registered Member Username: George_mc6 Post Number: 111 Registered: 8-2006 Posted From: 207.231.81.22 Rating: N/A |
What? | ||
| John Lacey (Junkman42)
Registered Member Username: Junkman42 Post Number: 4 Registered: 3-2007 Posted From: 204.49.140.133 Rating: N/A |
Thanks for the info, it is most appreciated. I have another question, so what else is new,right. I have the air cooled delco alternator which says to grease every 100,000 miles. I cannot find chevron brb-2 grease or anybody that even admits there was ever any such grease. Help John | ||
| Chris Peters (Chris_85_rts)
Registered Member Username: Chris_85_rts Post Number: 12 Registered: 11-2006 Posted From: 66.194.150.45 Rating: N/A |
John you might want to just start a new thread for the grease question, as people might not even look here again. | ||
| Chris Peters (Chris_85_rts)
Registered Member Username: Chris_85_rts Post Number: 13 Registered: 11-2006 Posted From: 66.194.150.45 Rating: N/A |
Never mind you beat me to it, sorry. |