Hydraulic motor keeps pushing seal out.

[4570Man]

This is the wheel drive motor on a zero turn mower ( my 428D Grasshopper). There’s a hub that presses on that spindle. I’ll check the other side for a snap ring but I think I’d have noticed a grove cut last time I had it apart.

 

[guitarman]

locktite makes products for retaining seals
Pratley Thread-Locker Grade BRG Bearing/Retainer - Locks, Retains, Seals
by Pratley
Be the first to review this item
Price: $4.99 Free Shipping for Prime Members
Medium/High strength thread locker, 10 Grams
Low viscosity retaining grade for retaining bearings onto shafts, into housings or for bushes and other cylindrical close tolerance assemblies
Use this grade to replace press fits with slip fits.
probably find at local auto parts store.

 

[currierej]

locktite makes products for retaining seals
Pratley Thread-Locker Grade BRG Bearing/Retainer - Locks, Retains, Seals
by Pratley
Be the first to review this item
Price:$4.99 Free Shipping for Prime Members
Medium/High strength thread locker, 10 Grams
Low viscosity retaining grade for retaining bearings onto shafts, into housings or for bushes and other cylindrical close tolerance assemblies
Use this grade to replace press fits with slip fits.
probably find at local auto parts store.

Look to the far right at PN# 3, I'm pretty sure that's the missing C-clip.

I found the picture on Google, wasn't able to pull up the parts list, but I bet its available....nice heavy duty mower!

 

[oldnslo]

Try doing a search for the mower shop. They have parts diagrams listed for the 428D. I did a quick look at did not see any snap ring. Looks that is considered a dust seal and the main seals are O-rings. I believe I looked at the 2004

 

[guitarman]

28 428D Wheel Motor Breakdown - Grasshopper Mower PartsThe Mower Shop, Inc.

this place has schematic also has parts

 

[4570Man]

There doesn’t appear to be a snap ring based on that parts diagram. The possibility exists that the 3rd party seal isn’t the right one but I’d guess the more likely scenario is the o-ring is leaking behind the seal and oil pressure is pushing it out.

 

[guitarman]

I don't see a lock ring of any kind think you might be right about an o-ring. Something has to pushing seal out hope you can figure it out.

 

[4570Man]

It doesn’t leak that bad to the tune of maybe 4 gallons last season but it’s enough to make a mess and create a safety hazard on my steel deck trailer. I’d like it to be leak free. That might be a tall order for a tired 2200 hour machine.

 

[currierej]

There doesn’t appear to be a snap ring based on that parts diagram. The possibility exists that the 3rd party seal isn’t the right one but I’d guess the more likely scenario is the o-ring is leaking behind the seal and oil pressure is pushing it out.

Yeah, looking back I was looking at the pump, not the motor, it still looks like there should be a snap ring, but maybe it is just a friction fit.

 

[guitarman]

I don't see a snap ring just the seal then the nut for the hub so try the lock tire or worst case use a punch and go around where the seal fits in and stake it after you push seal back in. I would try seal lock first, I had same problem on a steering pump on an old JD 400