Hello to all. I'm new to the world of Barth, and I need some help finding some parts (or part numbers at least) I just "inhereted" a 1991 30ft Barth coach with the 5.9 Cummins and AT Allison, mounted on an Oshkosh chassis. The fan /alternator belt is fried on this thing, and I need to replace it in order to drive her home. It wouldn't be an issue for me to go and take the old one off and find a new one, but its sitting 1.5 hrs away, with a limited parts supply around (small town). If I had a number, I could pick one up in the city before I head out. I dont think it has A/C on it, but I can make a phone call tomorrow. I do know it's a serpentine type of belt. Any help would be greatly appreciated!

The serpentine belt does not power the A/C compressor. If you had the engine number, on the cam cover side, you could call Cummins and they would give you the belt number.

The number that I had on my Cummins when it had the 105 amp alternator is:

5080560

That is a Cummins number and auto parts stores and particularly those that service trucks should be able to cross it.

I can say for sure that this belt would be the same because there may have been some fan differences between the earlier engines fitted with the 4 speed and the later fitted to the 6 speed but should be a good starting point.

HTH

quote:

1991 30ft Barth coach with the 5.9 Cummins and AT Allison, mounted on an Oshkosh chassis

Are you sure it's mounted on an Oshkosh? I think it might be on a Spartan Chassis.

you might find some useful information on the "Cummins, 6bt squeak I can't find (easily)" thread a few post down on the Tech Talk forum. There are even some color photo's!

If you have a Freightliner chassis, you should be able to go to a freighliner dealer, armed with the freightliner vin # and obtain a factory cummins belt. I just did this and the new belt cost me $65.00 american, but it is the cummins belt. I am sure there is cross reference to Gates or other aftermarket belt.
One thing to make sure of is the condition of the belt tensioner. Make sure it travels back and forth with a fair amount of tension. A bad tensioner may allow the belt to snap and break when the engine is turned off....I have seen this happen first hand, and I would not have believed it if I had not seen it since it is a pretty good size belt.

It is an Oshkosh Chassis. Below is a vin decoder for the first three digits of a chassis - His Vin Number is 4CDJ59M27M2104032

	VIN	Make/Manufacturer
	10T	Oshkosh
	11V	Ottawa
	137	AM General, Hummer
	15G	Gillig
	17N	John Deere
	18X	WRV
	19U	Acura
	1A4	Chrysler
	1A8	Chrysler
	1AC	AMC
	1AM	AMC
	1B3	Dodge
	1B4	Dodge
	1B6	Dodge
	1B7	Dodge
	1B7	Dodge
	1BA	Blue Bird
	1BB	Blue Bird
	1BD	Blue Bird
	1C3	Chrysler
	1C4	Chrysler
	1C8	Chrysler
	1C9	Chance
	1CY	Crane Carrier
	1D3	Dodge
	1D4	Dodge
	1D5	Dodge
	1D7	Dodge
	1D8	Dodge
	1EC	Fleetwood
	1F1	Ford
	1F6	Ford
	1FA	Ford
	1FB	Ford
	1FC	Ford
	1FD	Ford
	1FE	Ford
	1FM	Ford
	1FT	Ford
	1FU	Freightliner
	1FV	Freightliner
	1G1	Chevrolet
	1G2	Pontiac
	1G3	Oldsmobile
	1G4	Buick
	1G5	GMC, Pontiac
	1G6	Cadillac
	1G8	Chevrolet, Saturn
	1GA	Chevrolet
	1GB	Chevrolet
	1GC	Chevrolet
	1GD	GMC
	1GE	Cadillac
	1GF	Flexible
	1GG	Isuzu
	1GH	GMC, Oldsmobile
	1GJ	GMC
	1GK	GMC
	1GM	Pontiac
	1GN	Chevrolet
	1GT	GMC
	1GY	Cadillac
	1HG	Honda
	1HS	International
	1HT	International
	1HV	International
	1J4	Jeep
	1J7	Jeep
	1J8	Jeep
	1JC	AMC, Jeep
	1JD	AMC
	1JT	AMC, Jeep
	1L1	Lincoln
	1LN	Lincoln
	1M1	Mack
	1M2	Mack
	1M3	Mack
	1M8	MCI
	1ME	Mercury
	1MR	Lincoln
	1N4	Nissan
	1N6	Datsun, Nissan
	1N9	Neoplan
	1NK	Kenworth
	1NP	Peterbilt
	1NX	Toyota
	1P3	Plymouth
	1P4	Plymouth
	1P7	Plymouth
	1P9	Panoz
	1RF	Roadmaster
	1S9	Saleen
	177	Thomas
	1T8	Thomas
	1TU	TMC
	1V1	Volkswagen
	1VW	Volkswagen
	1WA	Autostar
	1WB	Autostar
	1WU	White Volvo
	1WV	Winnebago
	1XK	Kenworth
	1XM	AMC
	1XP	Peterbilt
	1Y1	Chevrolet, Geo
	1YV	Mazda
	1Z3	Mitsubishi
	1Z5	Mitsubishi
	1Z7	Mitsubishi
	1ZV	Ford
	1ZW	Mercury
	2A3	Chrysler
	2A4	Chrysler
	2A8	Chrysler
	2B1	Orion
	2B3	Dodge
	2B4	Dodge
	2B5	Dodge
	2B6	Dodge
	2B7	Dodge
	2B8	Dodge
	2BC	AMC, Jeep
	2C1	Chevrolet, Geo
	2C3	Chrysler
	2C4	Chrysler
	2C7	Pontiac
	2C8	Chrysler
	2CC	AMC, Eagle
	2CK	Geo, Pontiac
	2CM	AMC
	2CN	Chevrolet, Geo
	2D4	Dodge
	2D6	Dodge
	2D7	Dodge
	2D8	Dodge
	2E3	Eagle
	2FA	Ford
	2FD	Ford
	2FM	Ford
	2FT	Ford
	2FU	Freightliner
	2FV	Freightliner
	2FW	Sterling
	2FZ	Sterling
	2G0	GMC
	2G1	Chevrolet
	2G2	Pontiac
	2G3	Oldsmobile
	2G4	BuickX
	2G5	GMC
	2G7	Pontiac
	2G8	Chevrolet
	2GA	Chevrolet
	2GB	Chevrolet
	2GD	GMC
	2GJ	GMC
	2GK	GMC
	2GN	Chevrolet
	2GT	GMC
	2HG	Honda
	2HH	Acura
	2HJ	Honda
	2HK	Honda
	2HM	Hyundai
	2HN	Acura
	2HS	International
	2HT	International
	2J4	Jeep
	2LM	Lincoln
	2M2	Mack
	2ME	Mercury
	2MH	Mercury
	2MR	Mercury
	2NK	Kenworth
	2NP	Peterbilt
	2P3	Plymouth
	2P4	Plymouth
	2P5	Plymouth
	2P9	Prevost
	2PC	Prevost
	2S2	Suzuki
	2S3	Suzuki
	2T1	Toyota
	2T2	Lexus
	2WK	Western Star Trucks
	2WL	Western Star Trucks
	2XK	Kenworth
	2XM	Eagle
	2XP	Peterbilt
	3A4	Chrysler
	3A8	Chrysler
	3AB	Dina
	3AL	Freightliner
	3B3	Dodge
	3B4	Dodge
	3B6	Dodge
	3B7	Dodge
	3BK	Kenworth
	3BP	Peterbilt
	3C3	Chrysler
	3C4	Chrysler
	3C8	Chrysler
	3CA	Chrysler
	3D3	Dodge
	3D5	Dodge
	3D6	Dodge
	3D7	Dodge
	3FA	Ford
	3FC	Ford
	3FD	Ford
	3FE	Ford, Freightliner
	3FR	Ford
	3FT	Ford
	3G1	Chevrolet
	3G2	Pontiac
	3G4	Buick
	3G5	Buick
	3G7	Pontiac
	3GB	Chevrolet
	3GC	Chevrolet
	3GD	GMC
	3GE	Chevrolet
	3GK	GMC
	3GN	Chevrolet
	3GT	GMC
	3GY	Cadillac
	3HA	International
	3HG	Honda
	3HM	Honda
	3HS	International
	3HT	International
	3LN	Lincoln
	3MA	Mercury
	3ME	Mercury
	3N1	Nissan
	3NK	Kenworth
	3NM	Peterbilt
	3P3	Plymouth
	3TM	Toyota
	3VW	Volkswagen
	3WK	Kenworth
	45V	Utilimaster
	46G	Gillig
	49H	Sterling
	4A3	Mitsubishi
	4A4	Mitsubishi
	4B3	Dodge
	4C3	Chrysler
	4CD	Oshkosh
	4DR	Genesis, International
	4E3	Eagle
	4F2	Mazda
	4F4	Mazda
	4G1	Chevrolet
	4G2	Pontiac
	4GD	GMC
	4GT	Isuzu, WhiteGMC
	4JG	Mercedes-Benz
	4KB	Chevrolet
	4KD	GMC
	4KL	Isuzu
	4M2	Mercury
	4N1	Nissan
	4N2	Nissan
	4NU	Isuzu
	4P3	Plymouth
	4S1	Isuzu
	4S2	Isuzu
	4S3	Subaru
	4S4	Subaru
	4S6	Honda
	4S7	Spartan
	4SL	Magnum
	4T1	Toyota
	4T3	Toyota
	4TA	Toyota
	4US	BMW
	4UZ	Freightliner
	4V1	Volvo, WhiteGMC
	4V2	Volvo, WhiteGMC
	4V4	Volvo, WhiteGMC
	4V5	Volvo, WhiteGMC
	4VA	Volvo
	4VG	Volvo, WhiteGMC
	4VH	Volvo
	4VL	Volvo
	4VM	Volvo
	4VZ	Spartan
	5AS	GEM
	5B4	Workhorse
	5CK	Western Star Trucks
	5FN	Honda
	5FY	New Flyer
	5GA	Buick
	5GR	Hummer
	5GT	Hummer
	5GZ	Saturn
	5J6	Honda
	5J8	Acura
	5KJ	Western Star Trucks
	5KK	Western Star Trucks
	5LM	Lincoln
	5LT	Lincoln
	5N1	Nissan
	5N3	Infiniti
	5NM	Hyundai
	5NP	Hyundai
	5PV	Hino
	5S3	Saab
	5SX	Amercian LeFrance
	5T4	Workhorse
	5TB	Toyota
	5TD	Toyota
	5TE	Toyota
	5TF	Toyota
	5UM	BMW
	5UX	BMW
	5Y2	Pontiac
	6G2	Pontiac
	6MM	Mitsubishi
	6MP	Mercury
	9BF	Ford
	9BW	Volkswagen
	9DW	Volkswagen
	J81	Chevrolet,Geo
	J87	Isuzu
	J8B	Chevrolet
	J8D	GMC
	J8Z	Chevrolet
	JA3	Mitsubishi
	JA4	Mitsubishi
	JA7	Mitsubishi
	JAA	Isuzu
	JAB	Isuzu
	JAC	Isuzu
	JAE	Acura
	JAL	Isuzu
	JB3	Dodge
	JB4	Dodge
	JB7	Dodge
	JC2	Ford
	JD1	Daihatsu
	JD2	Daihatsu
	JE3	Eagle
	JF1	Subaru
	JF2	Subaru
	JF3	Subaru
	JF4	Saab
	JG1	Chevrolet, Geo
	JG7	Pontiac
	JGC	Geo
	JH4	Acura
	JHB	Hino
	JHL	Honda
	JHM	Honda
	JJ3	Chrysler
	JL6	Mitsubishi
	JLS	Sterling
	JM1	Mazda
	JM2	Mazda
	JM3	Mazda
	JN1	Datsun, Nissan
	JN3	Nissan
	JN4	Nissan
	JN6	Datsun, Nissan
	JN8	Nissan
	JNA	Nissan
	JNK	Infiniti
	JNR	Infiniti
	JNX	Infiniti
	JP3	Plymouth
	JP4	Plymouth
	JP7	Plymouth
	JR2X	Isuzu
	JS2	Suzuki
	JS3	Suzuki
	JS4	Suzuki
	JT2	Toyota
	JT3	Toyota
	JT4	Toyota
	JT5	Toyota
	JT6	Lexus
	JT8	Lexus
	JTD	Toyota
	JTE	Toyota
	JTH	Lexus
	JTJ	Lexus
	JTK	Scion
	JTL	Scion
	JTM	Toyota
	JTN	Toyota
	JW6	Mitsubishi
	JW7	Mitsubishi
	KL1	Chevrolet
	KL2	Pontiac
	KL5	Suzuki
	KL7	Asuna
	KLA	Daewoo
	KM8	Hyundai
	KMF	Hyundai
	KMH	Hyundai
	KNA	Kia
	KND	Hyundai, Kia
	KNJ	Ford
	KPH	Mitsubishi
	LES	Isuzu
	LM5	Isuzu
	ML3	Dodge
	SA9	Morgan
	SAJ	Jaguar
	SAL	Land Rover
	SAT	Triumph
	SAX	Sterling
	SCA	Rolls-Royce
	SCB	Bentley
	SCC	Lotus
	SCF	Aston Martin
	SHH	Honda
	SHS	Honda
	TRU	Audi
	VF1	Eagle
	VF3	Peugeot
	VG6	Mack
	W06	Cadillac
	WA1	Audi
	WAU	Audi
	WBA	BMW
	WBS	BMW
	WBX	BMW
	WD0	Dodge
	WD1	Dodge
	WD2	Dodge
	WD5	Dodge
	WD8	Dodge
	WDB	Maybach, Mercedes-Benz
	WDC	Mercedes-Benz
	WDD	Mercedes-Benz
	WDP	Dodge
	WDX	Dodge
	WDY	Dodge
	WF1	Merkur
	WKK	Fahrzeugwerke
	WME	Mercedes-Benz
	WMW	Mini
	WP0	Porsche
	WP1	Porsche
	WUA	Audi
	WV2	Volkswagen
	WV3	Volkswagen
	WVG	Volkswagen
	WVW	Volkswagen
	XTA	Lada
	YB3	Volvo
	YS3	Saab
	YV1	Volvo
	YV2	Volvo
	YV4	Volvo
	YV5	Volvo
	ZA9	Lamborghini
	ZAM	Maserati
	ZAR	Alfa Romeo
	ZC2	Chrysler
	ZFA	Fiat
	ZFF	Ferrari
	ZHWX	Lamborghini

Oshkosh was taken over by Freightliner sometime in the early 90's. My coach (sob ) is a Oshkosh XC18RD chassis, 18,000 lbs, rear Diesel, 190hp (upgraded to 230hp) with Allison 542 4 speed auto, 3.31:1 rear end that allows it to cuise at 70mph, (if you want to buy the fuel....)

I can take my vin to freightliner and recieve great service on parts, at very resonable prices too.

Thanks for the great info. I will check with Freightliner in the morning.

Might also check the vibration damper for a wobble. If the coach has sat for a long time (without running) the belt tension can cause the rubber isolator in the damper to shift and the damper will visibly wobble. If left to long with the wobble, it can cause crankshaft damage.

That was one of the first things I had to replace on my Cummins with only 75K miles.

NAPA also has the belt as it is also used on the Dodge PU

Thanks for the great resource guys. I called Freightliner this am and found they can get a parts listing on this unit. Found my belt number, and I will put it on this weekend. One question though: this unit has A/C on it that takes its drive from the fan hub via a V belt. Do I need to remove this belt to install the serpentine fan belt? Thanks.

Yes, you will have to remove the A/C belt. That belt part number (Cummins) is 17455. Just loosen the compressor to get enough belt slack to remove from the compressor and then fish the serpentine belt around the fan and replace.

If you replace the belt, make sure you get the equivalent heavy duty belt, not just a replacement for the length

Thanks MWrench, i will take my multi purpose, fix all olfa knife with me so I can "remove" the A/C comp belt before installing the new fan belt. It can wait till I get her home to put that belt on. Not really hot enough for A/C, or cold enough to need defrost, so no worries on taking drastic measures to make life easier. TTFN

I notice that the unit has the cummins up front (according a prior post.
I am interested if it has a thermostatic fan clutch rather than the fixed fan used on rear diesels.

Rear diesels push the air through the radiator, so a thermostat fan clutch can not be used but the front end diesel should be different.

Pictures...we like pictures!