UK Motorhome Information, Motorhome facts, American RV, Forums, Reviews, Sales, Campsites


 

Go Back   MotorhomeFun > NUTS & BOLTS & RECOURCES > TECH/MECH GENERAL
Register Forums Blogs FAQ Calendar Mark Forums Read

TECH/MECH GENERAL Discuss anything technical or mechanical that doesnt easily fit into the other sections.

Fiat/alko overheating rear steel wheels

Reply
 
LinkBack Thread Tools Display Modes
Old 04-11-2011, 15:26   #1 (permalink)
Read Only Funster
 
bjet's Avatar
 
Funster No : 18713
Join Date: Nov 2011
Location: england
MH Type: A class
Years Motorhoming: since 1990
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default Fiat/alko overheating rear steel wheels

Properly adjusted handbrake and disc systems yet wheels near their bolts reach 50 deg C after only 12 miles. Vehicle owned from new ( Dec 2007 ) and 20,000 miles covered. When rear jacked up and handbrake "off" , wheels rotate reasonably freely apart from slight initial "stickiness". There is no perceptible hub end-float present. Is it worth trying to adjust stub axle nut to give some end-float ? ( should be 0.025 - 0.10 mm according to Fiat )
bjet is offline   Reply With Quote
Sponsored Links
Old 04-11-2011, 15:34   #2 (permalink)
Funster
 
icantremember's Avatar
 
Funster No : 13512
Join Date: Sep 2010
Location: Nr Watton in Norfolk
Interests: Motorhoming , birding, walking
MH Type: Low profile
MH Model: Autocruise Augusta
Years Motorhoming: since 2005
Posts: 2,937
Thanks: 420
Thanked 536 Times in 498 Posts
Default

Hi and welcome to the fun.

With regard to your possible overheating bearing the Fiat figures will not be relevant in the slightest if you have an AlKo chasis......sorry I can't be of any real help. I would contact AlKo before attempting any adjustments.
Brian
__________________
Joyce & Brian


icantremember is online now   Reply With Quote
Old 04-11-2011, 15:38   #3 (permalink)
Funster
 
Popeye's Avatar
 
Funster No : 18072
Join Date: Sep 2011
Location: New Forest
About Me: Wed to Jackie for life, 2 sons 3 grandsons
Interests: Sailing / travelling / golf / DIY
MH Type: C class
MH Model: Geist Silver Spirit 700g
Years Motorhoming: On and off since 1983
Posts: 4,168
Thanks: 334
Thanked 561 Times in 511 Posts
Default

2 Things

1. Is there any noticeable blueing of the disc

2. Does it happen both sides of vehicle

If it ain't turning blue and it is the same both sides then I would say that 50degrees C sounds hot but I think you'll find that is acceptable.........Griff
__________________

...........
.....................Ain't no pockets in a shroud

.........................Sometimes the journey is as rewarding as the destination.

....................................Good judgment comes from experience, and a lot of that comes from bad judgment
Popeye is online now   Reply With Quote
Old 04-11-2011, 15:40   #4 (permalink)
Funster
 
wivvy's dad's Avatar
 
Funster No : 12229
Join Date: Jun 2010
Location: 48.066895,12.862673
MH Type: Transit LWB Hi-Top PVC
Years Motorhoming: On and Off since '98
Posts: 3,091
Thanks: 725
Thanked 1,108 Times in 626 Posts
Default

Wheel bearings could be on their way out?
Is it the same on both sides?
__________________


MEMOR ESTO

(\__/)
(='.'=)
(")_(")
wivvy's dad is offline   Reply With Quote
Old 04-11-2011, 16:06   #5 (permalink)
Funster
 
ScotJimland's Avatar
 
Funster No : 15
Join Date: Jul 2007
Location: Suffolk Coastal
About Me: ex fulltimer, now taking life easy
Interests: Sea Scouts, canoeing, Singers
MH Type: between vans
Years Motorhoming: long time
Posts: 19,180
Thanks: 3,891
Thanked 6,828 Times in 4,258 Posts
Default

Over greasing of the bearings will also cause them to heat up.
__________________
“Man with tool in hand is not necessarily a mechanic”.

I always cheer up immensely if an attack is particularly wounding because I think, well, if they attack one personally, it means they have not a single political argument left.
Margaret Thatcher


Singer Sewing Machine blog

French Aires, UK CLs & Sites suitable for RVs
ScotJimland is online now   Reply With Quote
Old 04-11-2011, 18:41   #6 (permalink)
Funster
 
SIFTA SAM's Avatar
 
Funster No : 5472
Join Date: Jan 2009
Location: Leyland Lancs
About Me: Retired
Interests: Re-applying for any EU/QUANGO post
MH Type: A class
MH Model: Hymer B544
Years Motorhoming: since 2001
Posts: 393
Thanks: 150
Thanked 74 Times in 60 Posts
Default

Quote:
Originally Posted by bjet View Post
Properly adjusted handbrake and disc systems yet wheels near their bolts reach 50 deg C after only 12 miles. Vehicle owned from new ( Dec 2007 ) and 20,000 miles covered. When rear jacked up and handbrake "off" , wheels rotate reasonably freely apart from slight initial "stickiness". There is no perceptible hub end-float present. Is it worth trying to adjust stub axle nut to give some end-float ? ( should be 0.025 - 0.10 mm according to Fiat )
Are the front brakes operating OK? Last year when I had overheating brakes, the problem was that the brakes on two wheels were trying to do the work of four, due to air in the other two brake cylinders.?
Just a thought!
SIFTA SAM is offline   Reply With Quote
Old 12-11-2011, 22:02   #7 (permalink)
Read Only Funster
 
bjet's Avatar
 
Funster No : 18713
Join Date: Nov 2011
Location: england
MH Type: A class
Years Motorhoming: since 1990
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default Hot steel wheels, problem solved !

[The heating WAS caused by the drum brakes. Testing with the wheels jacked-up after travelling showed that there WAS frictional contact between the shoes and their drums. The solution was to further adjust their clearance so that free wheel travel was obtained. Alko use the Fiat components mounted on to their swinging-arm torsion suspension with a different set-up to the standard X250 chassis, so "fine-tuning" after the basic Fiat adjustments is necessary to obtain proper handbrake operation WITHOUT the heating problems ! Incidentally, the rear wheel bearings are cassette types and NOT taper-rollers. They are fitted to the stub axles with nuts torqued to 45daNm.
My thanks to all who posted replies ! Bjet
bjet is offline   Reply With Quote
Old 12-11-2011, 22:12   #8 (permalink)
Funster
 
Popeye's Avatar
 
Funster No : 18072
Join Date: Sep 2011
Location: New Forest
About Me: Wed to Jackie for life, 2 sons 3 grandsons
Interests: Sailing / travelling / golf / DIY
MH Type: C class
MH Model: Geist Silver Spirit 700g
Years Motorhoming: On and off since 1983
Posts: 4,168
Thanks: 334
Thanked 561 Times in 511 Posts
Default

Quote:
Originally Posted by bjet View Post
[The heating WAS caused by the drum brakes. Testing with the wheels jacked-up after travelling showed that there WAS frictional contact between the shoes and their drums. The solution was to further adjust their clearance so that free wheel travel was obtained. Alko use the Fiat components mounted on to their swinging-arm torsion suspension with a different set-up to the standard X250 chassis, so "fine-tuning" after the basic Fiat adjustments is necessary to obtain proper handbrake operation WITHOUT the heating problems ! Incidentally, the rear wheel bearings are cassette types and NOT taper-rollers. They are fitted to the stub axles with nuts torqued to 45daNm.
My thanks to all who posted replies ! Bjet
I'm amazed, I was assuming you had discs on the back which is why I suggested looking for blueing on them. Spoke to my service manager and he said that 30 degrees is not unusual.

Glad you sorted it well done.
__________________

...........
.....................Ain't no pockets in a shroud

.........................Sometimes the journey is as rewarding as the destination.

....................................Good judgment comes from experience, and a lot of that comes from bad judgment
Popeye is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



Design by vBSkinworks
 
 
MotorhomeFun Shop
Autogas2000 -Refillable LPG solutions for the Motorhome
Get a free giffgaff Sim
Friendly professional service from qualified technicians
Pure Water From Your Tank
Free Fun Stickers
Don't buy a Motorhome before you read this guide
Johns Cross Motorcaravans
Garage run by Geo