G1800 dynamo belt - how to remove

bstauss

New member

Equipment
G1800
Aug 12, 2020
15
0
1
70070
I've read the forums about how to replace the belt by removing the three bolts holding the drive shaft to the pulley on the flywheel. What I haven't figured out is how to hold the driveshaft so it won't turn in order to get the three bolts loose. I'd also prefer to do this without removing the mower deck. Hoping someone on this forum has a solution for me. Thanks.
 

lugbolt

Well-known member

Equipment
ZG127S-54
Oct 15, 2015
4,866
1,607
113
Mid, South, USA
take the deck out. Not any better way to do it. while it's out, you can clean underneath-they get dirty and the transmission dont' have no cooler, just the fins on the transmission itself with a fan blowing air over it, just like a BX tractor. Degrease it while you have the deck out. Also while the deck is out, you can change the deck gearbox oil and grease all the fittings that you can't see with the deck under the tractor.

you can do it with the deck still on it but you'll fight yourself, and if you're like the other techs I worked with, invent new words. That was always interesting. Personally I like to work smart, not hard.

When I get one of these dinosaurs in for service, I give customer the option to pay a little extra labor for me to do all that and then a little more, or do it the cheap way. 80% of the time (or more) they want it done right. You can tell who is proud of their equipment and who isn't. I used to own one (G1900S) and got real familiar with it. 1300 hours when I sold it. I didn't want to sell it but a guy made me an offer that I'd have been really stupid to pass up....plus I had another/newer mower already. But I still miss some things about the G1900. 5 gal of diesel ran all season with it. This newer mower? I've put 20 gal of gasoline in it already and probably have a month & a half of mowing season left.....not counting leaf mulching in Nov/Dec assuming it's not too wet.

insert a screwdriver or pry stick in the rear u-joint and let it spin against the frame, then whack the 12mm wrench to bust it loose from the flange on the engine. Rotate engine using your prys on the back, repeat two more times. Reinstall the same way, use some thread locking agent on them.
 
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bstauss

New member

Equipment
G1800
Aug 12, 2020
15
0
1
70070
take the deck out. Not any better way to do it. while it's out, you can clean underneath-they get dirty and the transmission dont' have no cooler, just the fins on the transmission itself with a fan blowing air over it, just like a BX tractor. Degrease it while you have the deck out. Also while the deck is out, you can change the deck gearbox oil and grease all the fittings that you can't see with the deck under the tractor.

you can do it with the deck still on it but you'll fight yourself, and if you're like the other techs I worked with, invent new words. That was always interesting. Personally I like to work smart, not hard.

When I get one of these dinosaurs in for service, I give customer the option to pay a little extra labor for me to do all that and then a little more, or do it the cheap way. 80% of the time (or more) they want it done right. You can tell who is proud of their equipment and who isn't. I used to own one (G1900S) and got real familiar with it. 1300 hours when I sold it. I didn't want to sell it but a guy made me an offer that I'd have been really stupid to pass up....plus I had another/newer mower already. But I still miss some things about the G1900. 5 gal of diesel ran all season with it. This newer mower? I've put 20 gal of gasoline in it already and probably have a month & a half of mowing season left.....not counting leaf mulching in Nov/Dec assuming it's not too wet.

insert a screwdriver or pry stick in the rear u-joint and let it spin against the frame, then whack the 12mm wrench to bust it loose from the flange on the engine. Rotate engine using your prys on the back, repeat two more times. Reinstall the same way, use some thread locking agent on them.
Thanks Lugbolt! Great advice. I always take care of my equipment and appreciate your suggestions. You mention gear box oil. I didn't know there was gear box oil on the deck. I definitely need to change it out. Would you know what weight oil, and how do you drain it? Thanks.
 

Delmar

Member

Equipment
G1900 / Kubota BX
Sep 24, 2015
180
11
18
Bluegrass State
Inspect your oil seals on the mower deck gearbox. Since the pulley obscures your view of the bottom one unless you remove the gearbox, check for excess oil. The only place for oil to escape is the seals. The gearboxes will last practically forever IF oil in the box is maintained. Leaking oil seal is the cause for 100% of gearbox failures I've seen.
 

bstauss

New member

Equipment
G1800
Aug 12, 2020
15
0
1
70070
Inspect your oil seals on the mower deck gearbox. Since the pulley obscures your view of the bottom one unless you remove the gearbox, check for excess oil. The only place for oil to escape is the seals. The gearboxes will last practically forever IF oil in the box is maintained. Leaking oil seal is the cause for 100% of gearbox failures I've seen.
Will do. Thanks for the tip.