OutdoorKing Repair Forum Forums General Discussion Forum Events - Past & Present rover rancher 28166 clutch

Evening i have this rover rancher 28166 with the clutch pulled out of it.
I have put it back in with a new belt and it seems like it is set in forward.AND NO NEUTRAL OR REVERSE
My question is what do yyou need to do to set the clutch up and get in forward and reverse

Thanks in advance

Hi Ian,

If you have forward but not reverse for the auto drive you would think that there is something wrong with the cork clutch for reverse
or the linkage isn't working.The belt tension could be too loose.

I would set up the adjustments as per the manual and check the cork thickness.

https://www.outdoorking-forum.com.a...cher%2028166%20/%2028168%20/%2028151.pdf

https://www.outdoorking-forum.com.a...180%20Rancher%2013_30%20Auto%20Drive.pdf

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=7306

Cheers
Max.

Hello Max

the mower is locked into forward gear.
it has new clutch cork and new drive belt is tight.
would you have any diagrams of the clutch adjustment please

Thanks Ian

Hi Ian,

I haven't had a look at one of these Rovers but it was a similar setup to Greenfield.

There were adjustments in the last manuals I posted starting with https ,but this section Events - Past & Present
is the wrong part to post on so links won't work and images can't be posted here.

The right place is Forums Repairs and Maintenance Questions On Ride On Mowers Questions on Rover Ride On Mower

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/120994/rover-rancher-28166-auto-drive.html#Post120994

In this part of the forum to get the links to work you need to high light the whole link then right click on the link and select open
in new tab. , or just copy the link and paste it into the address bar.

Neutral:
When the foot pedal is in neutral, the friction drive disc is not in contact with either of the two pulleys on the drive axle. The drive belt from the engine is still spinning the friction drive disc, but no power is being transferred to the wheels.

Forward:
When you press the toe of the foot pedal:
The pedal system moves the friction drive disc into direct contact with one of the two pulleys on the drive axle.
This pulley is set up to spin the drive axle in the forward direction when driven by the friction disc.
The further you press the pedal, the harder the friction disc is pressed against the pulley, increasing the engagement and thus the speed (and torque) in the forward direction.

Reverse:
When you press the heel of the foot pedal:
The pedal system moves the friction drive disc away from the forward pulley and into contact with the other pulley on the drive axle.
This "reverse" pulley is designed such that when the friction disc engages it, it causes the drive axle to spin in the opposite direction

In the manual there is an Auto belt tension adjustment so I can't see why a tight belt would stop reverse working when
it needs the belt tension for forward and reverse.

Cheers
Max.

Thanks max

I have one before same machine.
That link is mainley for the belt tension which is correct

When the hole clutch was removed it was still in forward (i forgot to say)




Would you have pics when the clutch is in neutral,forward ond reverse

Thanks ian

Sounds like the friction material may be stuck and not disengaging or the linkage isn't working Ian



With the two large rear drive pulleys when the v belt is connected , one will always spin in the opposite direction to the other ,
hence forward and reverse is applied by locking one pulleys at a time to the shaft and neutral is when no pulleys are locked to
the shaft,the clutch friction material is used to lock one pulley at a time to the shaft.


Basic drawings below shows the patent for this drive setup so you can see how neutral,forward and reverse work.(copy and paste link)

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/78614/GREENFIELD_-_Theo_Reinhold_Pat.html#Post78614


Cheers
Max.

It could have a broken clutch spring on reverse that
Is stopping pressure being applied to the reverse clutch,
To fix that the whole rear clutch drive unit would need
To be removed.

Hi Ian.
If you disconnect the rod at the foot pedal you should be able to move the clutch plates from one side to the other

Max thanks for your helpi tried to find the clutch spring the parts manuel but couldnt find it.
would you have a diagram of it or parts number.

Thanks Normk will also look at that

Hi Ian,

Here are the springs on a Greenfield.

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/45818/greenfield-12-32-clutch-plates.html

I can't see a spring in the rover parts diagram.

The pulley assembly may have shifted on the hub , usually they have a grub screw
to locate the pulleys in the correct spot.

Thanks Max

I did have a look at the greenfield with the springs and as you said in the diagram parts there are no clutch springs there.

I am going to pull the whwole clutch assembly apart today and see what goes on I will let you know what i found if any

Ian

I have pulled the clutch apart and found the cork is stuffed.

Also i found there should be a shim A12110 behind the bearing in the friction plate and mine didnt have it on both sides( is it necessery. Icould find shim A12110)
would that make it stuff the cork . It wasnt like that when i looked at it proir to put on

I'd be putting the shim back in Ian,

The shim usually provides a few benefits....
Provide proper spacing between the bearing and the pulley
Prevent undue stress or uneven load on the pulley material
Reduce the risk of premature wear or failure of the alloy pulley

Yes it's possible without the shim it could wear the clutch material prematurely .


Cheers
Max.

Thanks Max

would you know the size of them, I cannot find the shims online
I have found the cork online

The exact thickness usually depends on the specific fit and tolerances required by your application Ian.

Thinner is usually better for fine adjustments: A shim that is too thick can cause misalignment, excessive preload, or bearing damage.

Common shim thickness is 1, 2 ,3 ,5, 10, thousandths of an inch.

If you can fit a 10 thou thick shim in start with that. Greenfield use a 10 thou thick shim.

It's just that you don't want end float and you don't want pre load on the bearings.

Repco sells shim steel 6 inches by 6 inches ,you get a few different thicknesses but it's about $79. and you can cut
your own from that.

It's a lot cheaper to buy from eBay and they have lots of shim washers all different sizes and thicknesses ,so you just
measure the shaft and the outer bearing ,if you can't find a shim washer to fit in you will need to buy the shim steel
sheets and cut your own.

Greenfield have the shim in the same position, I haven't measured the Rover to see if you can use the Greenfield shim
but the Greenfield shim is about $5 each ,possibly cheaper online.


There are a lot of Greenfield shims online using google. GT 00539 shim sale

GREENFIELD SHIM OD 31.8mm, ID 20.5mm
Description:
Non-Genuine Greenfield Drive Shaft Shim 31.8 mm O.D x 20.5 mm I.D x .010" Thick
Replaces OEM:
Greenfield GT00539, GT 00539, GT 539, GT 539,
Deck (inches)
25", 28", 30", 32", 34", 38" & 42" Cut
Deck (mm)
635 mm, 711 mm, 762 mm, 812 mm, 870 mm, 965 mm & 1067 mm Cut
Deck (cm)
63.5 cm, 71 cm, 76 cm, 81 cm, 87 cm, 96 cm & 107 cm Cut
Inside Diameter: (inches)
0.807"
Inside Diameter: (mm)
20.5 mm
Outside Diameter: (inches)
1.251"


Cheers
Max.

thanks Max

they be to small. The bearing is outside 52mm and inside is 19.5mm.
I cannot find any or info on the size of the original shim.

Does the shim cover the whole bearing?

Yes I'd just make the shims the same size as the whole side of the bearing.

I probably wouldn't buy a shim steel sheet if it was just for this job ,you could cut the side off a paint spray can
to make a shim as long as you deburr the shim after it's made.

Stainless steel would be a better shim ,you could make one from a Stainless Steel Food Storage Container etc.

A few shims made from a coke can would be better than none.

The Rover Drive system has been covered a few times on this site ,but only odd bits of info.

"Unlike greenfield rover decided they needed a spring return to neutral on the pedal. This can get out of adjustment to the drive neutral position limiting the pedal travel and therefore the pressure it can put on the clutch."

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/65001/rover-rancher-drive-system.html

Cheers
Max.