Installation, Repair and Replacement of John Deere Scotts 1642H Hydro Drive Belt

Left-hand and right-hand are referenced from the point of view of the tractor operator.The flat backside of the belt rides on flat idlers; the inside vee rides in v-idlers and pulleys. These John Deere products use belt part number GX10851 which is 95.87" long, 0.5" wide, HA section, 0.31 thick, 32 deg., KEVLAR


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#1. Overall view

Overall view of the drive belt layout (#1). The engine pulley is off to the right and the transmission pulley is to the left.

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#2. Disconnect tie rod

The tie rod (#2, yellow) must be disconnected and the parking brake latch handle (#2, blue) must be removed to change the belt. The latch spring extends from a hole in the latch rod (#2, white) to a bracket just forward of the flat idler. The belt can now be looped over the brake latch rod and around the steering shaft (#2, green).

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#3. Engine pulley

Remove the belt guide from the engine stack pulley and bring the belt around the upper pulley (#3).

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#4. Transmission pulley

Remove the rear v-idler and loop the belt around the transmission pulley. Position the belt in the v-idler and re-install it (#4).


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#5. Idler tension spring

Unhook the front end of the idler tensioning spring from the frame (#5, white) just forward of the steering shaft (#5, yellow).

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#6. Tensioning idlers

Route the belt around the tensioning idlers (#6) and re-hook the spring to the frame. The back end of the spring hooks into a notch on the idler arm (#6, blue). The back end of the brake latch spring hooks to the frame at #6, green.

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#7. Deere Scotts 1642H diagram

Deere Scotts 1642H diagram (#7). The engine stack pulley is at the right; transmission pulley at left.