Fontaine Ultra LT series, Service Manual

Page 1: ...Fontaine Fifth Wheel Ultra LT Service Manual Fontaine Fifth Wheel 7574 Commerce Circle Trussville AL 35173 2010 LT 156 August 2010 www fifthwheel com 800 874 9780 FONT AINE FIFTH WHEEL ...

Page 2: ... LT Series Inboard Adjustable plate mount Outboard Contents Identify your fifth wheel 2 3 Slides and brackets 4 5 Pre service procedures 6 8 Preventive maintenance 9 10 Uncoupling design 11 12 Troubleshooting 13 15 Rebuild 16 18 Disassembly 19 20 Assembly 21 22 Inboard models will be available in the future Indentifying features Fabricated pull handle Slide assemblies have center mounted air cylin...

Page 3: ...o minimum mileage between each stop The maximum total number of towed axles equals four 4 Road type must be maintained concrete asphalt gravel or crushed rock Gross Combination Weight GCW is less than 115 000 lbs or 52 000 kgs See Fontaine Application Guide LT 076 for specific application recommendations Product used in unapproved applications voids manufacture warranty Severe duty Fifth Wheel can...

Page 4: ...n 6 3 4 7 3 4 8 3 4 and 9 3 4 heights 12 16 24 36 and 48 slide travel LWO parts list Item no Description Part no Qty 1 Slide rail 1 2 Rear slide stop 2 3 Slide bracket 1 4 Bracket bushing BSH 3000 2 5 Air cylinder 1 6 Locking wedge 2 7 Hex bolt 3 8 16 x 1 1 4 gr5 2 8 Spacer bushing 2 9 Hex lock nut 3 8 16 gr5 2 10 Flat washer 1 2 2 11 Hex head bolt 1 2 13 x 1 2 Included in LWO LWI air cylinder kit...

Page 5: ...vailable for the LT family Manufactured with the durability and cost effectiveness of steel construction Brackets are welded to a 3 8 steel plate with six 5 8 bolt holes on each side for mounting versatility Plate has different cut out and different locations for rear rocker limit blocks Available in 6 1 4 7 1 4 8 1 4 and 9 1 4 heights APB weight chart Height 6 1 4 7 1 4 8 1 4 9 1 4 281 lbs 286 lb...

Page 6: ...ly to fill the reservoir Tilt the wheel to the rear rear of the wheel down and repeat the procedure Rock the top plate back and forth several times to spread the grease over the bearing surface Inspect the trailer kingpin plate and top surface of the fifth wheel to make sure each is properly greased A liberal coating of grease should be applied to the complete surfaces of both the trailer kingpin ...

Page 7: ...hould always be free of grease or any substance which could prevent a firm grip causing the handle to slip and possibly resulting in injury 4 Fontaine s air actuated Ultra LT fifth wheel is shown in Figure D A release valve located on the dash or in a lock box mounted on the rear of the cab is used to activate the release cylinder To open set the tractor parking brake and pull the release valve Ho...

Page 8: ...EL 8 Pre service procedures Black arrows are lube points when the fifth wheel is on a mount However for proper maintenance it is recommended you clean it and re grease the pivot points see white arrows Lubrication points Ultra LT Jaw and wedge see preservice and lubrication ...

Page 9: ...on of the secondary lock 4 Loose nuts and bolts in the fifth wheel and in the mounting hardware 5 Securely fastened and properly working springs 6 Check to see if both bracket pins are in place and secured by retainer pins and cotter pins 7 Check the locking jaw If dimension X is less than 0 8 20 25 mm replacement of the jaw and lockbar wedge is required See Figure A Check the fifth wheel operatio...

Page 10: ...ts become thick and binding at low temperatures In areas or regions that experience extreme and or prolonged freezing temperatures Fontaine recommends use of a cleaner or degreaser on the latching mechanism making sure that the moving parts operate freely This should be followed by an application of 90 weight oil diesel fuel kerosene motor oil etc to all moving parts This procedure may also be nec...

Page 11: ...w First pull of the handle rotates the secondary lock to clear the secondary lock stop Handle is pulled until notch is free to be placed on the latch catch block on the handle plate not shown Trailer holds the kingpin the jaw in the fifth wheel There is a portion of the lockbar that is in the throat of the fifth wheel As trailer pulls the kingpin away from the stationary jaw the rotating jaw moves...

Page 12: ...ushes the lockbar allowing the notch to become free of the lock catch The springs rotate the handle away from the lock catch allowing the fifth wheel to become set up for the next couple Fifth wheel is ready to couple There is some portion of the lockbar in the throat of the fifth wheel Fifth wheel is locked as shown by the handle notch being over the handle plate Fifth wheel is not closed since h...

Page 13: ...ents such as pull handle operating handle cover plate rotating locking jaw and secondary lock spring Will the pull handle move Finish or call Fontaine Parts Connection YES NO Hard to close Ultra LT Check for interference between top plate and base mount Make sure fifth wheel is in open position Make sure kingpin is at correct height Check for bent pull handle and or operating handle base Check tip...

Page 14: ... closed Is adjustment rod set correctly Is adjustment rod set correctly Finish or call Fontaine Parts Connection Finish or call Fontaine Parts Connection YES YES YES NO NO NO Will not latch open Ultra LT Check for interference between top plate and mount or other lower frame obstruction Check for missing or damaged operating handle pull handle or rotating jaw springs Check for excessive wear on pu...

Page 15: ...housing or broken internal spring Check air supply line for damage crushed or crimped Remove air cylinder and check for damage i e bent shaft exterior housing or broken internal spring Replace air line Is the wheel closing properly Is air supply line crushed or crimped Is air cylinder installed properly Finish or call Fontaine Parts Connection Finish or call Fontaine Parts Connection YES YES NO NO...

Page 16: ...KP Kingpin gauge MSC GAUGE Moly based lubricant such as Mobilgrease XHP320 or equivalent After inspection you may need to optionally order other kits See schematic on page18 Top plate rebuild kit Special tools Kingpin gauge MSC GAUGE Fontaine offers special tools for your fifth wheel to help your repairs go fast and easy KIT RPR UL L Inspect fifth wheel for damage Before rebuilding check to make s...

Page 17: ...d Ultra LT series part identification Pull handle Jaw spring Main springs Hex head bolt lock nut Adjustment rod nut Adjustment rod Bracket liner Rotating locking jaw Operating handle Pivot pin Pivot pin clip Locking wedge Pivot pin clip Pivot pin short Cover plate not shown for clarity ...

Page 18: ...acer bushing 1 24 Washer flat 5 8 1 25 Lock nut 5 8 11 1 Operating lever kit KIT OPR UL 19 Hex head bolt 5 8 11 x 1 75 1 20 Pivot pin short 1 23 Spacer bushing 1 24 Washer flat 5 8 1 25 Lock nut 5 8 11 1 31 Operating handle 1 32 Washer 3 4 1 33 Cotter Pin 1 Pull handle kit KIT PUL UL L 15 Lock nut 1 2 13 1 16 Washer 1 2 1 17 Bushing 5 16 1 18 Pull handle 1 22 Hex head bolt 1 2 13 x 1 5 1 Mounting ...

Page 19: ...e fifth wheel with a screw driver of adequate length to keep hands and fingers out of the throat of the wheel This will partially close the wheel Now pull out on the pull handle a small amount and complete the rotation of the jaw toward the front of the wheel Allow the pull handle to go in slowly for the wheel to completely close 1 Set the fifth wheel in the closed position 2 Remove the jaw spring...

Page 20: ... to the open position This will allow you to remove the operating handle from the wedge Remove the wedge item 30 and short pivot pin item 20 Turn the adjustment rod item 1 counter clockwise outward until it has moved about 2 from starting position This will eliminate interference when removing and installing the locking jaw 5 Remove the operating handle and locking wedge 6 Remove the pull handle a...

Page 21: ...ehind the locking jaw Before rebuilding the assembly check to make sure that there are no cracks in the crossmembers or other components Also check bracket pin holes to ensure they are not overly worn pins should fit snugly Refer to exploded view of assembly on page 18 to identify item numbers and parts Insert the rotating jaw item 28 after applying a light coating of grease Note Insert the jaw so...

Page 22: ...ithout binding or interference Attach the secondary lock latch item 21 to the operating handle item 31 using the 5 8 11 hex head bolt item 19 and new lock nut item 25 with flat washer and spacer items 23 24 Note the orientation of the bolt item 19 the threads should be facing up 5 Attach the secondary lock latch to the operating handle 6 Attach springs 7 Adjust fifth wheel 7 Adjust fifth wheel Ref...

Page 23: ...FONT AINE FIFTH WHEEL FONT AINE FIFTH WHEEL 800 874 9780 www fifthwheel com 23 ...

Page 24: ...800 874 9780 www fifthwheel com 24 www fifthwheel com 2010 Fontaine Fifth Wheel LT 156 September 2010 All specifications are subject to change without notice www fifthwheel com FONT AINE FIFTH WHEEL ...