John Deere — Belt/Pulley Drive Installation
Installation · Pulleys / belts
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Shaft rotation is counterclockwise as viewed from the shaft; be sure to drive the pump in the proper direction.
Procedure
- Mount pulleys as close to pump and motor/engine shaft bearings as possible.
- Check alignment with a straight edge.
- Make sure the belt has proper tension; too much tension causes bearing wear, too little causes slippage.
- Figure proper pump pulley diameter: multiply motor/engine rpm by motor/engine pulley diameter and divide by desired pump speed.
Tools required
- straight edge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Pump Pulley Size = Motor RPM x Motor Pulley Size / Desired Pump Speed
Source: John Deere service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.