M4900 help

JSCHMELZ

New member

Equipment
M4900 and zd21
Jul 23, 2022
8
0
1
Maryland
My tractor will start in gear and I can come to complete stop by depressing clutch. But I can not shift gears when running. Any help would be greatly appreciated.
 

woodman55

Well-known member

Equipment
L6060HSTC, RTV 1100
May 15, 2022
927
721
93
canada
Check your owners manual for clutch pedal play. Also, did this happen suddenly, or was it a gradual thing. If gradual, then probably just needs adjusting, if suddenly, then something has broken or came disconnected.
 

JSCHMELZ

New member

Equipment
M4900 and zd21
Jul 23, 2022
8
0
1
Maryland
Check your owners manual for clutch pedal play. Also, did this happen suddenly, or was it a gradual thing. If gradual, then probably just needs adjusting, if suddenly, then something has broken or came disconnected.

Work fine but sat for a month and when I started it it would not go In gear. So I shut it off and started in gear. Once running if you take out ov gear it won't go back In.
 

dvcochran

Active member

Equipment
Kubota M9000, New Holland TN90, Deere 2640, Vermeer 504N, Vermeer 504SI, more
Feb 23, 2011
212
44
28
Dickson, TN
If it is started in gear and you let out on the clutch what happens? Does it appear to act the same regardless of the gear? Does it pull? If running and in gear, what happens when you try to slip it into neutral? It could be as simple as a clutch adjustment, or it could be synchronizers in the tranny.
 

Russell King

Well-known member
Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
5,367
1,415
113
Austin, Texas
Did the clutch plate rust to the flywheel while sitting in wet or humid conditions?

Sounds like that except for the “I can stop by pushing the clutch pedal “

Try cleaning it by slipping the clutch during a few take offs

Then adjust it if needed
 

JSCHMELZ

New member

Equipment
M4900 and zd21
Jul 23, 2022
8
0
1
Maryland
If it is started in gear and you let out on the clutch what happens? Does it appear to act the same regardless of the gear? Does it pull? If running and in gear, what happens when you try to slip it into neutral? It could be as simple as a clutch adjustment, or it could be synchronizers in the tranny.

It has 4 gears and hi range low range and reverse. When started in gear it works fine but does feel like its pulling a little not enough to move but it rocks When I press clutch once its running I can stop like normal. But when I change gears or go from hi low or reverse it acts like I dont have the clutch pressed down
 

woodman55

Well-known member

Equipment
L6060HSTC, RTV 1100
May 15, 2022
927
721
93
canada
Sounds like the disk is sticking to the input shaft splines, and not sliding that tiny little bit to release from the flywheel fully. If that's the case, there's not much you can do except cycle the pedal a bunch of times or take it apart and clean the splines. Check/ adjust your pedal and keep using it for a while and hopefully it frees up.
 

JSCHMELZ

New member

Equipment
M4900 and zd21
Jul 23, 2022
8
0
1
Maryland
Sounds like the disk is sticking to the input shaft splines, and not sliding that tiny little bit to release from the flywheel fully. If that's the case, there's not much you can do except cycle the pedal a bunch of times or take it apart and clean the splines. Check/ adjust your pedal and keep using it for a while and hopefully it frees up.

Ok thanks I will be changing the oil and filter on Monday and try that.
 

Russell King

Well-known member
Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
5,367
1,415
113
Austin, Texas
Ok thanks I will be changing the oil and filter on Monday and try that.
That will do nothing for the clutch.

There may be a grease zerk behind a cover on the side of the transmission/clutch housing by the brake pedal, that zerk is to put grease between the shaft and throw bearing carrier tube.
 

Tx Jim

Well-known member
Lifetime Member

Equipment
M7040 HDC-1,JD 4255,Ford 6700
Apr 30, 2013
1,199
128
63
Coyote Flats,Texas
Does clutch operating pedal have at least 1'' of free travel? Have you lubricated trans shift linkage lately? Several yrs ago I owned a M4900 that reverser synchronizers failed & trans was stuck(hung) in reverse but trans could still be shifted
 

dvcochran

Active member

Equipment
Kubota M9000, New Holland TN90, Deere 2640, Vermeer 504N, Vermeer 504SI, more
Feb 23, 2011
212
44
28
Dickson, TN
It has 4 gears and hi range low range and reverse. When started in gear it works fine but does feel like its pulling a little not enough to move but it rocks When I press clutch once its running I can stop like normal. But when I change gears or go from hi low or reverse it acts like I dont have the clutch pressed down
Hard to say from my screen, but it does sound like a clutch issue. You really need the manuals (usually a free download with a little online searching). Follow the clutch pedal mechanism. If it is like my M9, there are two screw adjusters just past the pivot point of the pedal. You could try adjusting to see if it makes any change. Just measure and make certain you can put it back where it was.