Title: OC-3/46 Clutch slipping
Post by: Dianne on April 22, 2006, 12:07:15 AM
Post by: Dianne on April 22, 2006, 12:07:15 AM
Hi ya'll!
I restored a 1952 OC-46 with the 3 cylinder Herc gas engine a few years ago but it hadn't seen much use until the past week. The clutch looked good so I didn't replace the disks when I restored it.
Last weekend I was working it pretty hard, digging up a rock that was really too big for it and the clutch started slipping a bit. Now it seems the clutch is weak. I should be able to slip the tracks in 1st gear or pull the engine down off the governor but it seems the clutch is slipping under heavy load.
I checked the pedal linkage and it's fine but it seems like as soon as I put a bit of pressure on the pedal/linkage, the clutch starts to disengage.
I checked my service manual but the illustrations aren't very clear and I honestly can't remember the internal arrangement of the clutch operating linkages. So, before I go to all the work of pulling the floorboards, aux. transmission, and bell housing, is there something inside the bell housing that may need adjustment or had I better order new disks and pressure springs before I pull it apart?
I have a fair amount of excavating and grading to do in the next 8 weeks so I need my little Ollie running RIGHT!
Thanks gang!
Dianne
The crazy old woman with a crawler
I restored a 1952 OC-46 with the 3 cylinder Herc gas engine a few years ago but it hadn't seen much use until the past week. The clutch looked good so I didn't replace the disks when I restored it.
Last weekend I was working it pretty hard, digging up a rock that was really too big for it and the clutch started slipping a bit. Now it seems the clutch is weak. I should be able to slip the tracks in 1st gear or pull the engine down off the governor but it seems the clutch is slipping under heavy load.
I checked the pedal linkage and it's fine but it seems like as soon as I put a bit of pressure on the pedal/linkage, the clutch starts to disengage.
I checked my service manual but the illustrations aren't very clear and I honestly can't remember the internal arrangement of the clutch operating linkages. So, before I go to all the work of pulling the floorboards, aux. transmission, and bell housing, is there something inside the bell housing that may need adjustment or had I better order new disks and pressure springs before I pull it apart?
I have a fair amount of excavating and grading to do in the next 8 weeks so I need my little Ollie running RIGHT!
Thanks gang!
Dianne
The crazy old woman with a crawler
Title: Clutch
Post by: John Schwiebert on April 22, 2006, 12:46:18 AM
Post by: John Schwiebert on April 22, 2006, 12:46:18 AM
Back up here, is this an OC-46 with a double disk clutch or a 1952 crawler which would be an OC-3 with a single plate clutch. Set me straight on that. How much free travel do you have? How about a tractor serial number? Start there. John
Title: clutch
Post by: walter hudson on April 22, 2006, 12:50:06 AM
Post by: walter hudson on April 22, 2006, 12:50:06 AM
if you have free travel in the pedal and the linkage is not binding ,the problem would have to be inside the bell housing . it has a double disc clutch and they usually give more trouble with not releasing than slipping .your best bet is to pull the bellhousing off and see where your problem is .
good luck
good luck
Title:
Post by: Dianne on April 22, 2006, 11:16:23 AM
Post by: Dianne on April 22, 2006, 11:16:23 AM
John: It's an OC-46, serial 1WR712, with a double disk clutch and a Ware loader. (As near as I could figure, it was 1952, the first year they produced a gas version - gas serial numbers started at 1WR700 or 701.)
Walter: Free-travel is good and the (external) linkage is loose with the pedal up so I am sure the problem is inside the bell housing
I seem to remember this clutch having lots of "grab" when I first rebuilt it. I'm afraid I may have damaged it working that one BIG rock. I know you are not supposed to ride the clutch but the only way I could move that xxxxx rock was by "bumping it".
(Almost buried the little Ollie in the mud in the bottom of a hole yesterday! Had to use my bucket to work my way out of the mud. Must pay more attention to what's under the tracks instead of being totally focused on what's in front of the bucket!)
Walter: Free-travel is good and the (external) linkage is loose with the pedal up so I am sure the problem is inside the bell housing
I seem to remember this clutch having lots of "grab" when I first rebuilt it. I'm afraid I may have damaged it working that one BIG rock. I know you are not supposed to ride the clutch but the only way I could move that xxxxx rock was by "bumping it".(Almost buried the little Ollie in the mud in the bottom of a hole yesterday! Had to use my bucket to work my way out of the mud. Must pay more attention to what's under the tracks instead of being totally focused on what's in front of the bucket!)
Title:
Post by: mikegt4 on April 22, 2006, 03:54:59 PM
Post by: mikegt4 on April 22, 2006, 03:54:59 PM
Your serial # shows it to be a 1959, hence John's confusion about the year as neither the OC4(6) or the 3 cyl. engine were made in 1952.
Dianne, I enjoyed looking at your restoration web page several years back, interesting story but those photos are pretty small for these old eyes.
http://www.ytmag.com/cgi-bin/snlookup.c ... d=OC-4-3-G (http://www.ytmag.com/cgi-bin/snlookup.cgi?mf=OLC&md=OC-4-3-G)
Dianne, I enjoyed looking at your restoration web page several years back, interesting story but those photos are pretty small for these old eyes.
http://www.ytmag.com/cgi-bin/snlookup.c ... d=OC-4-3-G (http://www.ytmag.com/cgi-bin/snlookup.cgi?mf=OLC&md=OC-4-3-G)
Title:
Post by: Dianne on April 23, 2006, 01:03:34 AM
Post by: Dianne on April 23, 2006, 01:03:34 AM
Maybe I have the date wrong but that list looks like the one from the Crestline book and I did find that book to be in error - well, "superficial" really. I did a lot of research to date my crawler and did determine it was from the first year gas tractors were built and that the gas serial numbers started at 1WR700 or 1WR701. The vintage of the serial number of the crawler also matched the vintage of the engine serial number.
Fact remains, it IS an OC-46 with a 3 cylinder Hercules, and a 2-disk clutch.
Sorry about the small pictures but I had to take the large ones off my Web page due to space limitations.
Dianne
Fact remains, it IS an OC-46 with a 3 cylinder Hercules, and a 2-disk clutch.
Sorry about the small pictures but I had to take the large ones off my Web page due to space limitations.
Dianne