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2009 DURATECH TUB GRINDER OPERATING INSTRUCTIONS
6.2 Electro-hydraulic valve calibration (for S.N. Up to 20-4-DJ0019)
IMPORTANT: Stay clear of all moving parts while calibrating the electro‑hydraulic valve. The tub
will be rotating during this adjustment.
To calibrate the electro‑hydraulic valve coil after following the three steps above, perform the following steps:
1. Remove the rubber end cap from the end of the electro‑hydraulic valve. This will reveal a jam nut and an
adjusting stud with a screwdriver slot.
2. Disconnect the wiring harness from the electro‑hydraulic valve coil, and loosen the jam nut.
3. Start the engine, and engage the tub drive in the forward direction. Throttle the engine up to a fast idle.
Do not engage the clutch!
4. If the tub is not rotating, turn the adjusting screw clockwise until it bottoms out. Turn the adjusting screw
counterclockwise until the tub stops. The electro-hydraulic valve is now calibrated.
5. Lock the adjusting screw with the jam nut and replace the rubber cap. Shut down the machine using the
normal shutdown procedure in this manual. Reconnect the wiring harness to the electro‑hydraulic valve
coil.
electro-hydraulic valve
location of adjusting nut and jam nut
found under rubber cap end
( REV. 02-11 )
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